merge trunkmig_alloc_reform

98 files changed, 1628 insertions, 1109 deletions

diff --git a/ChangeLog b/ChangeLog
index 83e7053..64d80c1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,23 +1,147 @@
+2013-02-11  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/tclZlib.c (ZlibTransformOutput): [Bug 3603553]: Ensure that
+	data gets written to the underlying stream by compressing transforms
+	when the amount of data to be written is one buffer's-worth; problem
+	was particularly likely to occur when compressing large quantities of
+	not-very-compressible data. Many thanks to Piera Poggio (vampiera) for
+	reporting.
+
+2013-02-09  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/tclOOBasic.c (TclOO_Object_VarName): [Bug 3603695]: Change
+	the way that the 'varname' method is implemented so that there are no
+	longer problems with interactions due to the resolver. Thanks to
+	Taylor Venable <tcvena@gmail.com> for identifying the problem.
+
+2013-02-08  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/regc_nfa.c (duptraverse): [Bug 3603557]: Increase the
+	maximum depth of recursion used when duplicating an automaton in
+	response to encountering a "wild" RE that hit the previous limit.
+	Allow the limit (DUPTRAVERSE_MAX_DEPTH) to be set by defining its
+	value in the Makefile. Problem reported by Jonathan Mills.
+
+2013-02-05  Don Porter  <dgp@users.sourceforge.net>
+
+	* win/tclWinFile.c:	[Bug 3603434] Make sure TclpObjNormalizePath() 
+	properly declares "a:/" to be normalized, even when no "A:" drive is
+	present on the system.
+
+2013-02-05  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/tclLoadNone.c (TclpLoadMemory): [Bug 3433012]: Added dummy
+	version of this function to use in the event that a platform thinks it
+	can load from memory but cannot actually do so due to it being
+	disabled at configuration time.
+
+2013-02-04  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/tclCompCmds.c (TclCompileArraySetCmd): [Bug 3603163]: Stop
+	crash in weird case where [eval] is used to make [array set] get
+	confused about whether there is a local variable table or not. Thanks
+	to Poor Yorick for identifying a reproducible crashing case.
+
+2013-01-30  Andreas Kupries  <andreask@activestate.com>
+
+	* library/platform/platform.tcl (::platform::LibcVersion): See
+	* library/platform/pkgIndex.tcl: [Bug 3599098]: Fixed the RE
+	* unix/Makefile.in: extracting the version to avoid issues with
+	* win/Makefile.in: recent changes to the glibc banner. Now
+	  targeting a less variable part of the string. Bumped package to
+	  version 1.0.11.
+
+2013-01-28  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/tclCompCmds.c (TclCompileArraySetCmd)
+	(TclCompileArrayUnsetCmd, TclCompileDictAppendCmd)
+	(TclCompileDictCreateCmd, CompileDictEachCmd, TclCompileDictIncrCmd)
+	(TclCompileDictLappendCmd, TclCompileDictMergeCmd)
+	(TclCompileDictUnsetCmd, TclCompileDictUpdateCmd)
+	(TclCompileDictWithCmd, TclCompileInfoCommandsCmd):
+	* generic/tclCompCmdsSZ.c (TclCompileStringMatchCmd)
+	(TclCompileStringMapCmd): Improve the code generation in cases where
+	full compilation is impossible but a full ensemble invoke is provably
+	not necessary.
+
+2013-01-26  Jan Nijtmans  <nijtmans@users.sf.net>
+
+	* unix/tclUnixCompat.c: [Bug 3601804]: platformCPUID segmentation
+	fault on Darwin.
+
+2013-01-23  Donal K. Fellows  <dkf@users.sf.net>
+
+	* library/http/http.tcl (http::geturl): [Bug 2911139]: Do not do vwait
+	for connect to avoid reentrancy problems (except when operating
+	without a -command option). Internally, this means that all sockets
+	created by the http package will always be operated in asynchronous
+	mode.
+
+2013-01-21  Jan Nijtmans  <nijtmans@users.sf.net>
+
+	* generic/tclInt.decls: Put back Tcl[GS]etStartupScript(Path|FileName)
+	in private stub table, so extensions using this (like Tk 8.4) will
+	continue to work in all Tcl 8.x versions. Extensions using this
+	still cannot be compiled against Tcl 8.6 headers.
+
+2013-01-18  Jan Nijtmans  <nijtmans@users.sf.net>
+
+	* generic/tclPort.h: [Bug 3598300]: unix: tcl.h does not include
+	sys/stat.h
+
+2013-01-17  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/tclCompCmds.c (PushVarName): [Bug 3600328]: Added mechanism
+	for suppressing compilation of variables when we couldn't cope with
+	the results. Useful for some [array] subcommands.
+	* generic/tclEnsemble.c (CompileToCompiledCommand): Must restore the
+	compilation environment when a command compiler fails.
+
+2013-01-16  Donal K. Fellows  <dkf@users.sf.net>
+
+	* generic/tclZlib.c (TclZlibInit): [Bug 3601086]: Register the config
+	info in the iso8859-1 encoding as that is guaranteed to be present.
+
+2013-01-16  Jan Nijtmans  <nijtmans@users.sf.net>
+
+	* Makefile.in:   Allow win32 build with -DTCL_NO_DEPRECATED, just as
+	* generic/tcl.h: in the UNIX build. Define Tcl_EvalObj and
+	* generic/tclDecls.h: Tcl_GlobalEvalObj as macros, even when
+	* generic/tclBasic.c: TCL_NO_DEPRECATED is defined, so Tk can benefit
+	from it too.
+
+2013-01-14  Jan Nijtmans  <nijtmans@users.sf.net>
+
+	* win/tcl.m4: More flexible search for win32 tclConfig.sh, backported
+	from TEA (not actually used in Tcl, only for Tk)
+
+2013-01-14  Jan Nijtmans  <nijtmans@users.sf.net>
+
+	* generic/tclInt.decls: Put back Tcl_[GS]etStartupScript in internal
+	stub table, so extensions using this, compiled against 8.5 headers
+	still run in Tcl 8.6.
+
 2013-01-13  Alexandre Ferrieux  <ferrieux@users.sourceforge.net>
-	* doc/fileevent.n: Clarify readable fileevent "false positives" in
-	the case of multibyte encodings/transforms [Bug 3436609].
+
+	* doc/fileevent.n: [Bug 3436609]: Clarify readable fileevent "false
+	positives" in the case of multibyte encodings/transforms.
 
 2013-01-13  Jan Nijtmans  <nijtmans@users.sf.net>
 
-	* generic/tclIntDecls.h: If TCL_NO_DEPRECATED is defined, make
-	sure that TIP #139 functions all are taken from the public stub
-	table, even if the inclusion is through tclInt.h.
+	* generic/tclIntDecls.h: If TCL_NO_DEPRECATED is defined, make sure
+	that TIP #139 functions all are taken from the public stub table, even
+	if the inclusion is through tclInt.h.
 
 2013-01-12  Jan Nijtmans  <nijtmans@users.sf.net>
 
-	* generic/tclInt.decls: Put back TclBackgroundException in
-	internal stub table, so extensions using this, compiled
-	against 8.5 headers still run in Tcl 8.6.
+	* generic/tclInt.decls: Put back TclBackgroundException in internal
+	stub table, so extensions using this, compiled against 8.5 headers
+	still run in Tcl 8.6.
 
 2013-01-09  Jan Nijtmans  <nijtmans@users.sf.net>
 
-	* library/http/http.tcl: [Bug 3599395]: http assumes status line
-	is a proper tcl list.
+	* library/http/http.tcl: [Bug 3599395]: http assumes status line is a
+	proper Tcl list.
 
 2013-01-08  Jan Nijtmans  <nijtmans@users.sf.net>
 
@@ -28,10 +152,10 @@
 2013-01-07  Jan Nijtmans  <nijtmans@users.sf.net>
 
 	* generic/tclOOStubLib.c: Restrict the stub library to only use
-	* generic/tclTomMathStubLib.c: Tcl_PkgRequireEx, Tcl_ResetResult
-	and Tcl_AppendResult, not any other function. This puts least
-	restrictions on eventual Tcl 9 stubs re-organization, and it
-	works on the widest range of Tcl versions.
+	* generic/tclTomMathStubLib.c: Tcl_PkgRequireEx, Tcl_ResetResult and
+	Tcl_AppendResult, not any other function. This puts least restrictions
+	on eventual Tcl 9 stubs re-organization, and it works on the widest
+	range of Tcl versions.
 
 2013-01-06  Jan Nijtmans  <nijtmans@users.sf.net>
 
@@ -4128,6 +4252,7 @@
 	* generic/*Decls.h:   (regenerated)
 
 2010-08-18  Miguel Sofer  <msofer@users.sf.net>
+
 	* generic/tclBasic.c:   New redesign of [tailcall]: find
 	* generic/tclExecute.c: errors early on, so that errorInfo
 	* generic/tclInt.h:     contains the proper info [Bug 3047235]
diff --git a/doc/namespace.n b/doc/namespace.n
index b06d27a..f2812b2 100644
--- a/doc/namespace.n
+++ b/doc/namespace.n
@@ -287,7 +287,7 @@ This command is the complement of the \fBnamespace qualifiers\fR command.
 It does not check whether the namespace names are, in fact,
 the names of currently defined namespaces.
 .TP
-\fBnamespace upvar\fR \fInamespace\fR ?\fIotherVar myVar \fR...
+\fBnamespace upvar\fR \fInamespace\fR ?\fIotherVar myVar \fR...?
 .
 This command arranges for zero or more local variables in the current
 procedure to refer to variables in \fInamespace\fR. The namespace name is
diff --git a/doc/string.n b/doc/string.n
index f5eae39..351c865 100644
--- a/doc/string.n
+++ b/doc/string.n
@@ -19,7 +19,7 @@ string \- Manipulate strings
 Performs one of several string operations, depending on \fIoption\fR.
 The legal \fIoption\fRs (which may be abbreviated) are:
 .TP
-\fBstring compare\fR ?\fB\-nocase\fR? ?\fB\-length int\fR? \fIstring1 string2\fR
+\fBstring compare\fR ?\fB\-nocase\fR? ?\fB\-length\fI length\fR? \fIstring1 string2\fR
 .
 Perform a character-by-character comparison of strings \fIstring1\fR
 and \fIstring2\fR.  Returns \-1, 0, or 1, depending on whether
@@ -29,7 +29,7 @@ first \fIlength\fR characters are used in the comparison.  If
 \fB\-length\fR is negative, it is ignored.  If \fB\-nocase\fR is
 specified, then the strings are compared in a case-insensitive manner.
 .TP
-\fBstring equal\fR ?\fB\-nocase\fR? ?\fB\-length int\fR? \fIstring1 string2\fR
+\fBstring equal\fR ?\fB\-nocase\fR? ?\fB\-length\fI length\fR? \fIstring1 string2\fR
 .
 Perform a character-by-character comparison of strings \fIstring1\fR
 and \fIstring2\fR.  Returns 1 if \fIstring1\fR and \fIstring2\fR are
diff --git a/doc/try.n b/doc/try.n
index 393fe5b..78a006d 100644
--- a/doc/try.n
+++ b/doc/try.n
@@ -87,7 +87,7 @@ Handle different reasons for a file to not be openable for reading:
 .PP
 .CS
 \fBtry\fR {
-    set f [open /some/file/name]
+    set f [open /some/file/name w]
 } \fBtrap\fR {POSIX EISDIR} {} {
     puts "failed to open /some/file/name: it's a directory"
 } \fBtrap\fR {POSIX ENOENT} {} {
diff --git a/generic/regc_nfa.c b/generic/regc_nfa.c
index 4fb3ea6..2c2397f 100644
--- a/generic/regc_nfa.c
+++ b/generic/regc_nfa.c
@@ -759,7 +759,9 @@ duptraverse(
      * Arbitrary depth limit. Needs tuning, but this value is sufficient to
      * make all normal tests (not reg-33.14) pass.
      */
-#define DUPTRAVERSE_MAX_DEPTH 500
+#ifndef DUPTRAVERSE_MAX_DEPTH
+#define DUPTRAVERSE_MAX_DEPTH 700
+#endif
 
     if (depth++ > DUPTRAVERSE_MAX_DEPTH) {
 	NERR(REG_ESPACE);
diff --git a/generic/tcl.h b/generic/tcl.h
index 3003abf..2556a9a 100644
--- a/generic/tcl.h
+++ b/generic/tcl.h
@@ -472,7 +472,7 @@ typedef unsigned TCL_WIDE_INT_TYPE	Tcl_WideUInt;
 	struct {long tv_sec;} st_ctim;
 	/* Here is a 4-byte gap */
     } Tcl_StatBuf;
-#elif defined(HAVE_STRUCT_STAT64)
+#elif defined(HAVE_STRUCT_STAT64) && !defined(__APPLE__)
     typedef struct stat64 Tcl_StatBuf;
 #else
     typedef struct stat Tcl_StatBuf;
@@ -2602,13 +2602,6 @@ EXTERN void		Tcl_GetMemoryInfo(Tcl_DString *dsPtr);
  */
 
 #ifndef TCL_NO_DEPRECATED
-#   undef  Tcl_EvalObj
-#   define Tcl_EvalObj(interp,objPtr) \
-	Tcl_EvalObjEx((interp),(objPtr),0)
-#   undef  Tcl_GlobalEvalObj
-#   define Tcl_GlobalEvalObj(interp,objPtr) \
-	Tcl_EvalObjEx((interp),(objPtr),TCL_EVAL_GLOBAL)
-
 /*
  * These function have been renamed. The old names are deprecated, but we
  * define these macros for backwards compatibilty.
diff --git a/generic/tclAssembly.c b/generic/tclAssembly.c
index 0674e87..6e62d4d 100644
--- a/generic/tclAssembly.c
+++ b/generic/tclAssembly.c
@@ -798,12 +798,10 @@ TclNRAssembleObjCmd(
 
     if (codePtr == NULL) {
 	Tcl_AddErrorInfo(interp, "\n    (\"");
-	Tcl_AddErrorInfo(interp, Tcl_GetString(objv[0]));
+	Tcl_AppendObjToErrorInfo(interp, objv[0]);
 	Tcl_AddErrorInfo(interp, "\" body, line ");
 	backtrace = Tcl_NewIntObj(Tcl_GetErrorLine(interp));
-	Tcl_IncrRefCount(backtrace);
-	Tcl_AddErrorInfo(interp, Tcl_GetString(backtrace));
-	Tcl_DecrRefCount(backtrace);
+	Tcl_AppendObjToErrorInfo(interp, backtrace);
 	Tcl_AddErrorInfo(interp, ")");
 	return TCL_ERROR;
     }
@@ -860,7 +858,7 @@ CompileAssembleObj(
 
     if (objPtr->typePtr == &assembleCodeType) {
 	namespacePtr = iPtr->varFramePtr->nsPtr;
-	codePtr = objPtr->internalRep.otherValuePtr;
+	codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 	if (((Interp *) *codePtr->interpHandle == iPtr)
 		&& (codePtr->compileEpoch == iPtr->compileEpoch)
 		&& (codePtr->nsPtr == namespacePtr)
@@ -945,7 +943,7 @@ CompileAssembleObj(
      * Record the local variable context to which the bytecode pertains
      */
 
-    codePtr = objPtr->internalRep.otherValuePtr;
+    codePtr = objPtr->internalRep.twoPtrValue.ptr1;
     if (iPtr->varFramePtr->localCachePtr) {
 	codePtr->localCachePtr = iPtr->varFramePtr->localCachePtr;
 	codePtr->localCachePtr->refCount++;
@@ -4263,11 +4261,11 @@ AddBasicBlockRangeToErrorInfo(
     Tcl_AddErrorInfo(interp, "\n    in assembly code between lines ");
     lineNo = Tcl_NewIntObj(bbPtr->startLine);
     Tcl_IncrRefCount(lineNo);
-    Tcl_AddErrorInfo(interp, Tcl_GetString(lineNo));
+    Tcl_AppendObjToErrorInfo(interp, lineNo);
     Tcl_AddErrorInfo(interp, " and ");
     if (bbPtr->successor1 != NULL) {
 	Tcl_SetIntObj(lineNo, bbPtr->successor1->startLine);
-	Tcl_AddErrorInfo(interp, Tcl_GetString(lineNo));
+	Tcl_AppendObjToErrorInfo(interp, lineNo);
     } else {
 	Tcl_AddErrorInfo(interp, "end of assembly code");
     }
@@ -4331,14 +4329,13 @@ static void
 FreeAssembleCodeInternalRep(
     Tcl_Obj *objPtr)
 {
-    ByteCode *codePtr = objPtr->internalRep.otherValuePtr;
+    ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 
     codePtr->refCount--;
     if (codePtr->refCount <= 0) {
 	TclCleanupByteCode(codePtr);
     }
     objPtr->typePtr = NULL;
-    objPtr->internalRep.otherValuePtr = NULL;
 }
 
 /*
diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index f437bde..b32f5b1 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -4173,9 +4173,6 @@ TclNREvalObjv(
     }
     cmdPtrPtr = (Command **) &(callbackPtr->data[0]);
 
-    callbackPtr->data[2] = INT2PTR(objc);
-    callbackPtr->data[3] = (ClientData) objv;
-
     iPtr->numLevels++;
     result = TclInterpReady(interp);
 
@@ -5840,7 +5837,6 @@ Tcl_Eval(
  *----------------------------------------------------------------------
  */
 
-#undef Tcl_EvalObj
 int
 Tcl_EvalObj(
     Tcl_Interp *interp,
@@ -5848,7 +5844,6 @@ Tcl_EvalObj(
 {
     return Tcl_EvalObjEx(interp, objPtr, 0);
 }
-#undef Tcl_GlobalEvalObj
 int
 Tcl_GlobalEvalObj(
     Tcl_Interp *interp,
diff --git a/generic/tclBinary.c b/generic/tclBinary.c
index 455b5a6..3e9ab01 100644
--- a/generic/tclBinary.c
+++ b/generic/tclBinary.c
@@ -204,9 +204,10 @@ typedef struct ByteArray {
 #define BYTEARRAY_SIZE(len) \
 		((unsigned) (TclOffset(ByteArray, bytes) + (len)))
 #define GET_BYTEARRAY(objPtr) \
-		((ByteArray *) (objPtr)->internalRep.otherValuePtr)
+		((ByteArray *) (objPtr)->internalRep.twoPtrValue.ptr1)
 #define SET_BYTEARRAY(objPtr, baPtr) \
-		(objPtr)->internalRep.otherValuePtr = (void *) (baPtr)
+		(objPtr)->internalRep.twoPtrValue.ptr1 = (VOID *) (baPtr)
+
 
 /*
  *----------------------------------------------------------------------
@@ -325,7 +326,7 @@ Tcl_SetByteArrayObj(
 	Tcl_Panic("%s called with shared object", "Tcl_SetByteArrayObj");
     }
     TclFreeIntRep(objPtr);
-    Tcl_InvalidateStringRep(objPtr);
+    TclInvalidateStringRep(objPtr);
 
     if (length < 0) {
 	length = 0;
@@ -420,7 +421,7 @@ Tcl_SetByteArrayLength(
 	byteArrayPtr->allocated = length;
 	SET_BYTEARRAY(objPtr, byteArrayPtr);
     }
-    Tcl_InvalidateStringRep(objPtr);
+    TclInvalidateStringRep(objPtr);
     byteArrayPtr->used = length;
     return byteArrayPtr->bytes;
 }
@@ -691,7 +692,7 @@ TclAppendBytesToByteArray(
     if (len > 0) {
 	memcpy(byteArrayPtr->bytes + byteArrayPtr->used, bytes, len);
 	byteArrayPtr->used += len;
-	Tcl_InvalidateStringRep(objPtr);
+	TclInvalidateStringRep(objPtr);
     }
 }
 
diff --git a/generic/tclCkalloc.c b/generic/tclCkalloc.c
index 2973678..ce57cd5 100644
--- a/generic/tclCkalloc.c
+++ b/generic/tclCkalloc.c
@@ -156,6 +156,10 @@ TclInitDbCkalloc(void)
     if (!ckallocInit) {
 	ckallocInit = 1;
 	ckallocMutexPtr = Tcl_GetAllocMutex();
+#ifndef TCL_THREADS
+	/* Silence compiler warning */
+	(void)ckallocMutexPtr;
+#endif
     }
 }
 
diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index d5acc05..ae4113c 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -1540,7 +1540,8 @@ StringIsCmd(
     case STR_IS_BOOL:
     case STR_IS_TRUE:
     case STR_IS_FALSE:
-	if (TCL_OK != Tcl_ConvertToType(NULL, objPtr, &tclBooleanType)) {
+	if ((objPtr->typePtr != &tclBooleanType)
+		&& (TCL_OK != TclSetBooleanFromAny(NULL, objPtr))) {
 	    if (strict) {
 		result = 0;
 	    } else {
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c
index b4e517f..c7cfb97 100644
--- a/generic/tclCompCmds.c
+++ b/generic/tclCompCmds.c
@@ -107,6 +107,7 @@ static int		CompileDictEachCmd(Tcl_Interp *interp,
  */
 
 #define TCL_NO_LARGE_INDEX 1	/* Do not return localIndex value > 255 */
+#define TCL_NO_ELEMENT 2	/* Do not push the array element. */
 
 /*
  * The structures below define the AuxData types defined in this file.
@@ -259,7 +260,7 @@ TclCompileArrayExistsCmd(
     }
 
     tokenPtr = TokenAfter(parsePtr->tokenPtr);
-    PushVarNameWord(interp, tokenPtr, envPtr, 0,
+    PushVarNameWord(interp, tokenPtr, envPtr, TCL_NO_ELEMENT,
 	    &localIndex, &simpleVarName, &isScalar, 1);
     if (!isScalar) {
 	return TCL_ERROR;
@@ -283,7 +284,7 @@ TclCompileArraySetCmd(
     CompileEnv *envPtr)		/* Holds resulting instructions. */
 {
     DefineLineInformation;	/* TIP #280 */
-    Tcl_Token *tokenPtr;
+    Tcl_Token *varTokenPtr, *dataTokenPtr;
     int simpleVarName, isScalar, localIndex;
     int dataVar, iterVar, keyVar, valVar, infoIndex;
     int back, fwd, offsetBack, offsetFwd, savedStackDepth;
@@ -293,20 +294,21 @@ TclCompileArraySetCmd(
 	return TCL_ERROR;
     }
 
-    tokenPtr = TokenAfter(parsePtr->tokenPtr);
-    PushVarNameWord(interp, tokenPtr, envPtr, 0,
+    varTokenPtr = TokenAfter(parsePtr->tokenPtr);
+    PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_ELEMENT,
 	    &localIndex, &simpleVarName, &isScalar, 1);
+    dataTokenPtr = TokenAfter(varTokenPtr);
     if (!isScalar) {
 	return TCL_ERROR;
     }
-    tokenPtr = TokenAfter(tokenPtr);
 
     /*
      * Special case: literal empty value argument is just an "ensure array"
      * operation.
      */
 
-    if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD && tokenPtr[1].size == 0) {
+    if (dataTokenPtr->type == TCL_TOKEN_SIMPLE_WORD
+	    && dataTokenPtr[1].size == 0) {
 	if (localIndex >= 0) {
 	    TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex,	envPtr);
 	    TclEmitInstInt1(INST_JUMP_TRUE1, 7,			envPtr);
@@ -329,14 +331,38 @@ TclCompileArraySetCmd(
      * Prepare for the internal foreach.
      */
 
-    if (envPtr->procPtr == NULL) {
-	return TCL_ERROR;
-    }
     dataVar = TclFindCompiledLocal(NULL, 0, 1, envPtr);
     iterVar = TclFindCompiledLocal(NULL, 0, 1, envPtr);
     keyVar = TclFindCompiledLocal(NULL, 0, 1, envPtr);
     valVar = TclFindCompiledLocal(NULL, 0, 1, envPtr);
 
+    if (dataVar < 0) {
+	/*
+	 * Right number of arguments, but not compilable as we can't allocate
+	 * (unnamed) local variables to manage the internal iteration.
+	 */
+
+	Tcl_Obj *objPtr = Tcl_NewObj();
+	char *bytes;
+	int length, cmdLit;
+
+	Tcl_GetCommandFullName(interp, (Tcl_Command) cmdPtr, objPtr);
+	bytes = Tcl_GetStringFromObj(objPtr, &length);
+	cmdLit = TclRegisterNewCmdLiteral(envPtr, bytes, length);
+	TclSetCmdNameObj(interp, envPtr->literalArrayPtr[cmdLit].objPtr,
+		cmdPtr);
+	TclEmitPush(cmdLit, envPtr);
+	TclDecrRefCount(objPtr);
+	if (localIndex >= 0) {
+	    CompileWord(envPtr, varTokenPtr, interp, 1);
+	} else {
+	    TclEmitInstInt4(INST_REVERSE, 2,			envPtr);
+	}
+	CompileWord(envPtr, dataTokenPtr, interp, 2);
+	TclEmitInstInt1(INST_INVOKE_STK1, 3,			envPtr);
+	return TCL_OK;
+    }
+
     infoPtr = ckalloc(sizeof(ForeachInfo) + sizeof(ForeachVarList *));
     infoPtr->numLists = 1;
     infoPtr->firstValueTemp = dataVar;
@@ -351,7 +377,7 @@ TclCompileArraySetCmd(
      * Start issuing instructions to write to the array.
      */
 
-    CompileWord(envPtr, tokenPtr, interp, 2);
+    CompileWord(envPtr, dataTokenPtr, interp, 2);
     TclEmitOpcode(	INST_DUP,				envPtr);
     TclEmitOpcode(	INST_LIST_LENGTH,			envPtr);
     PushLiteral(envPtr, "1", 1);
@@ -434,10 +460,10 @@ TclCompileArrayUnsetCmd(
     int simpleVarName, isScalar, localIndex, savedStackDepth;
 
     if (parsePtr->numWords != 2) {
-	return TCL_ERROR;
+	return TclCompileBasic2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
-    PushVarNameWord(interp, tokenPtr, envPtr, 0,
+    PushVarNameWord(interp, tokenPtr, envPtr, TCL_NO_ELEMENT,
 	    &localIndex, &simpleVarName, &isScalar, 1);
     if (!isScalar) {
 	return TCL_ERROR;
@@ -928,7 +954,7 @@ TclCompileDictIncrCmd(
 
 	incrTokenPtr = TokenAfter(keyTokenPtr);
 	if (incrTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	    return TCL_ERROR;
+	    return TclCompileBasic2Or3ArgCmd(interp, parsePtr,cmdPtr, envPtr);
 	}
 	word = incrTokenPtr[1].start;
 	numBytes = incrTokenPtr[1].size;
@@ -938,7 +964,7 @@ TclCompileDictIncrCmd(
 	code = TclGetIntFromObj(NULL, intObj, &incrAmount);
 	TclDecrRefCount(intObj);
 	if (code != TCL_OK) {
-	    return TCL_ERROR;
+	    return TclCompileBasic2Or3ArgCmd(interp, parsePtr,cmdPtr, envPtr);
 	}
     } else {
 	incrAmount = 1;
@@ -951,16 +977,16 @@ TclCompileDictIncrCmd(
      */
 
     if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	return TCL_ERROR;
+	return TclCompileBasic2Or3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     name = varTokenPtr[1].start;
     nameChars = varTokenPtr[1].size;
     if (!TclIsLocalScalar(name, nameChars)) {
-	return TCL_ERROR;
+	return TclCompileBasic2Or3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr);
     if (dictVarIndex < 0) {
-	return TCL_ERROR;
+	return TclCompileBasic2Or3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
@@ -1078,16 +1104,16 @@ TclCompileDictUnsetCmd(
 
     tokenPtr = TokenAfter(parsePtr->tokenPtr);
     if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     name = tokenPtr[1].start;
     nameChars = tokenPtr[1].size;
     if (!TclIsLocalScalar(name, nameChars)) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr);
     if (dictVarIndex < 0) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
@@ -1178,7 +1204,7 @@ TclCompileDictCreateCmd(
   nonConstant:
     worker = TclFindCompiledLocal(NULL, 0, 1, envPtr);
     if (worker < 0) {
-	return TCL_ERROR;
+	return TclCompileBasicMin0ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     PushLiteral(envPtr,		"", 0);
@@ -1239,7 +1265,7 @@ TclCompileDictMergeCmd(
 
     workerIndex = TclFindCompiledLocal(NULL, 0, 1, envPtr);
     if (workerIndex < 0) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     infoIndex = TclFindCompiledLocal(NULL, 0, 1, envPtr);
 
@@ -1365,11 +1391,11 @@ CompileDictEachCmd(
     Tcl_DString buffer;
 
     /*
-     * There must be at least three argument after the command.
+     * There must be three arguments after the command.
      */
 
     if (parsePtr->numWords != 4) {
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     varsTokenPtr = TokenAfter(parsePtr->tokenPtr);
@@ -1377,7 +1403,7 @@ CompileDictEachCmd(
     bodyTokenPtr = TokenAfter(dictTokenPtr);
     if (varsTokenPtr->type != TCL_TOKEN_SIMPLE_WORD ||
 	    bodyTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
@@ -1389,7 +1415,7 @@ CompileDictEachCmd(
 	collectVar = TclFindCompiledLocal(NULL, /*nameChars*/ 0, /*create*/ 1,
 		envPtr);
 	if (collectVar < 0) {
-	    return TCL_ERROR;
+	    return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
 	}
     }
 
@@ -1403,31 +1429,31 @@ CompileDictEachCmd(
     if (Tcl_SplitList(NULL, Tcl_DStringValue(&buffer), &numVars,
 	    &argv) != TCL_OK) {
 	Tcl_DStringFree(&buffer);
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     Tcl_DStringFree(&buffer);
     if (numVars != 2) {
 	ckfree(argv);
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     nameChars = strlen(argv[0]);
     if (!TclIsLocalScalar(argv[0], nameChars)) {
 	ckfree(argv);
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     keyVarIndex = TclFindCompiledLocal(argv[0], nameChars, 1, envPtr);
 
     nameChars = strlen(argv[1]);
     if (!TclIsLocalScalar(argv[1], nameChars)) {
 	ckfree(argv);
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     valueVarIndex = TclFindCompiledLocal(argv[1], nameChars, 1, envPtr);
     ckfree(argv);
 
     if ((keyVarIndex < 0) || (valueVarIndex < 0)) {
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
@@ -1439,7 +1465,7 @@ CompileDictEachCmd(
 
     infoIndex = TclFindCompiledLocal(NULL, 0, 1, envPtr);
     if (infoIndex < 0) {
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
@@ -1636,16 +1662,16 @@ TclCompileDictUpdateCmd(
 
     dictVarTokenPtr = TokenAfter(parsePtr->tokenPtr);
     if (dictVarTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     name = dictVarTokenPtr[1].start;
     nameChars = dictVarTokenPtr[1].size;
     if (!TclIsLocalScalar(name, nameChars)) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     dictIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr);
     if (dictIndex < 0) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
@@ -1695,7 +1721,7 @@ TclCompileDictUpdateCmd(
     failedUpdateInfoAssembly:
 	ckfree(duiPtr);
 	ckfree(keyTokenPtrs);
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     bodyTokenPtr = tokenPtr;
 
@@ -1793,17 +1819,17 @@ TclCompileDictAppendCmd(
 
     tokenPtr = TokenAfter(parsePtr->tokenPtr);
     if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     } else {
 	register const char *name = tokenPtr[1].start;
 	register int nameChars = tokenPtr[1].size;
 
 	if (!TclIsLocalScalar(name, nameChars)) {
-	    return TCL_ERROR;
+	    return TclCompileBasicMin2ArgCmd(interp, parsePtr,cmdPtr, envPtr);
 	}
 	dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr);
 	if (dictVarIndex < 0) {
-	    return TCL_ERROR;
+	    return TclCompileBasicMin2ArgCmd(interp, parsePtr,cmdPtr, envPtr);
 	}
     }
 
@@ -1854,16 +1880,16 @@ TclCompileDictLappendCmd(
     keyTokenPtr = TokenAfter(varTokenPtr);
     valueTokenPtr = TokenAfter(keyTokenPtr);
     if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     name = varTokenPtr[1].start;
     nameChars = varTokenPtr[1].size;
     if (!TclIsLocalScalar(name, nameChars)) {
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr);
     if (dictVarIndex < 0) {
-	return TCL_ERROR;
+	return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
     CompileWord(envPtr, keyTokenPtr, interp, 3);
     CompileWord(envPtr, valueTokenPtr, interp, 4);
@@ -1907,7 +1933,7 @@ TclCompileDictWithCmd(
 	tokenPtr = TokenAfter(tokenPtr);
     }
     if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	return TCL_ERROR;
+	return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
@@ -1919,7 +1945,8 @@ TclCompileDictWithCmd(
     for (ptr=tokenPtr[1].start,end=ptr+tokenPtr[1].size ; ptr!=end ; ptr++) {
 	if (*ptr!=' ' && *ptr!='\t' && *ptr!='\n' && *ptr!='\r') {
 	    if (envPtr->procPtr == NULL) {
-		return TCL_ERROR;
+		return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr,
+			envPtr);
 	    }
 	    bodyIsEmpty = 0;
 	    break;
@@ -3745,7 +3772,9 @@ TclCompileInfoCommandsCmd(
      * We require one compile-time known argument for the case we can compile.
      */
 
-    if (parsePtr->numWords != 2) {
+    if (parsePtr->numWords == 1) {
+	return TclCompileBasic0ArgCmd(interp, parsePtr, cmdPtr, envPtr);
+    } else if (parsePtr->numWords != 2) {
 	return TCL_ERROR;
     }
     tokenPtr = TokenAfter(parsePtr->tokenPtr);
@@ -3782,7 +3811,7 @@ TclCompileInfoCommandsCmd(
 
   notCompilable:
     Tcl_DecrRefCount(objPtr);
-    return TCL_ERROR;
+    return TclCompileBasic1ArgCmd(interp, parsePtr, cmdPtr, envPtr);
 }
 
 int
@@ -6004,7 +6033,7 @@ PushVarName(
     Tcl_Interp *interp,		/* Used for error reporting. */
     Tcl_Token *varTokenPtr,	/* Points to a variable token. */
     CompileEnv *envPtr,		/* Holds resulting instructions. */
-    int flags,			/* TCL_NO_LARGE_INDEX. */
+    int flags,			/* TCL_NO_LARGE_INDEX | TCL_NO_ELEMENT. */
     int *localIndexPtr,		/* Must not be NULL. */
     int *simpleVarNamePtr,	/* Must not be NULL. */
     int *isScalarPtr,		/* Must not be NULL. */
@@ -6185,10 +6214,11 @@ PushVarName(
 	}
 
 	/*
-	 * Compile the element script, if any.
+	 * Compile the element script, if any, and only if not inhibited. [Bug
+	 * 3600328]
 	 */
 
-	if (elName != NULL) {
+	if (elName != NULL && !(flags & TCL_NO_ELEMENT)) {
 	    if (elNameChars) {
 		envPtr->line = line;
 		envPtr->clNext = clNext;
diff --git a/generic/tclCompCmdsSZ.c b/generic/tclCompCmdsSZ.c
index 5333fcf..5c1e6eb 100644
--- a/generic/tclCompCmdsSZ.c
+++ b/generic/tclCompCmdsSZ.c
@@ -448,7 +448,7 @@ TclCompileStringMatchCmd(
 
     if (parsePtr->numWords == 4) {
 	if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
-	    return TCL_ERROR;
+	    return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
 	}
 	str = tokenPtr[1].start;
 	length = tokenPtr[1].size;
@@ -457,7 +457,7 @@ TclCompileStringMatchCmd(
 	     * Fail at run time, not in compilation.
 	     */
 
-	    return TCL_ERROR;
+	    return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr);
 	}
 	nocase = 1;
 	tokenPtr = TokenAfter(tokenPtr);
@@ -578,13 +578,13 @@ TclCompileStringMapCmd(
     Tcl_IncrRefCount(mapObj);
     if (!TclWordKnownAtCompileTime(mapTokenPtr, mapObj)) {
 	Tcl_DecrRefCount(mapObj);
-	return TCL_ERROR;
+	return TclCompileBasic2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     } else if (Tcl_ListObjGetElements(NULL, mapObj, &len, &objv) != TCL_OK) {
 	Tcl_DecrRefCount(mapObj);
-	return TCL_ERROR;
+	return TclCompileBasic2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     } else if (len != 2) {
 	Tcl_DecrRefCount(mapObj);
-	return TCL_ERROR;
+	return TclCompileBasic2ArgCmd(interp, parsePtr, cmdPtr, envPtr);
     }
 
     /*
diff --git a/generic/tclCompExpr.c b/generic/tclCompExpr.c
index ab5de1c..0938e3b 100644
--- a/generic/tclCompExpr.c
+++ b/generic/tclCompExpr.c
@@ -2207,7 +2207,7 @@ ExecConstantExprTree(
     TclInitByteCodeObj(byteCodeObj, envPtr);
     TclFreeCompileEnv(envPtr);
     ckfree(envPtr);
-    byteCodePtr = byteCodeObj->internalRep.otherValuePtr;
+    byteCodePtr = byteCodeObj->internalRep.twoPtrValue.ptr1;
     TclNRExecuteByteCode(interp, byteCodePtr);
     code = TclNRRunCallbacks(interp, TCL_OK, rootPtr);
     Tcl_DecrRefCount(byteCodeObj);
diff --git a/generic/tclCompile.c b/generic/tclCompile.c
index 30e7d34..e8f778a 100644
--- a/generic/tclCompile.c
+++ b/generic/tclCompile.c
@@ -789,8 +789,7 @@ SetByteCodeFromAny(
     if (interp == NULL) {
 	return TCL_ERROR;
     }
-    TclSetByteCodeFromAny(interp, objPtr, NULL, NULL);
-    return TCL_OK;
+    return TclSetByteCodeFromAny(interp, objPtr, NULL, NULL);
 }
 
 /*
@@ -844,10 +843,9 @@ static void
 FreeByteCodeInternalRep(
     register Tcl_Obj *objPtr)	/* Object whose internal rep to free. */
 {
-    register ByteCode *codePtr = objPtr->internalRep.otherValuePtr;
+    register ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 
     objPtr->typePtr = NULL;
-    objPtr->internalRep.otherValuePtr = NULL;
     codePtr->refCount--;
     if (codePtr->refCount <= 0) {
 	TclCleanupByteCode(codePtr);
@@ -867,9 +865,8 @@ FreeByteCodeInternalRep(
  *	None.
  *
  * Side effects:
- *	Frees objPtr's bytecode internal representation and sets its type and
- *	objPtr->internalRep.otherValuePtr NULL. Also releases its literals and
- *	frees its auxiliary data items.
+ *	Frees objPtr's bytecode internal representation and sets its type NULL
+ *	Also releases its literals and frees its auxiliary data items.
  *
  *----------------------------------------------------------------------
  */
@@ -1144,7 +1141,7 @@ CompileSubstObj(
 	objPtr->typePtr = &substCodeType;
 	TclFreeCompileEnv(&compEnv);
 
-	codePtr = objPtr->internalRep.otherValuePtr;
+	codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 	objPtr->internalRep.ptrAndLongRep.ptr = codePtr;
 	objPtr->internalRep.ptrAndLongRep.value = flags;
 	if (iPtr->varFramePtr->localCachePtr) {
@@ -1183,7 +1180,6 @@ FreeSubstCodeInternalRep(
     register ByteCode *codePtr = objPtr->internalRep.ptrAndLongRep.ptr;
 
     objPtr->typePtr = NULL;
-    objPtr->internalRep.otherValuePtr = NULL;
     codePtr->refCount--;
     if (codePtr->refCount <= 0) {
 	TclCleanupByteCode(codePtr);
@@ -2639,7 +2635,7 @@ TclInitByteCodeObj(
      */
 
     TclFreeIntRep(objPtr);
-    objPtr->internalRep.otherValuePtr = codePtr;
+    objPtr->internalRep.twoPtrValue.ptr1 = codePtr;
     objPtr->typePtr = &tclByteCodeType;
 
     /*
@@ -4058,7 +4054,7 @@ Tcl_Obj *
 TclDisassembleByteCodeObj(
     Tcl_Obj *objPtr)		/* The bytecode object to disassemble. */
 {
-    ByteCode *codePtr = objPtr->internalRep.otherValuePtr;
+    ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1;
     unsigned char *codeStart, *codeLimit, *pc;
     unsigned char *codeDeltaNext, *codeLengthNext;
     unsigned char *srcDeltaNext, *srcLengthNext;
diff --git a/generic/tclDecls.h b/generic/tclDecls.h
index 2801102..fe9ba2b 100644
--- a/generic/tclDecls.h
+++ b/generic/tclDecls.h
@@ -3803,4 +3803,16 @@ extern const TclStubs *tclStubsPtr;
 #undef TCL_STORAGE_CLASS
 #define TCL_STORAGE_CLASS DLLIMPORT
 
+/*
+ * Deprecated Tcl procedures:
+ */
+#if defined(USE_TCL_STUBS) && !defined(USE_TCL_STUB_PROCS)
+#   undef Tcl_EvalObj
+#   define Tcl_EvalObj(interp,objPtr) \
+	Tcl_EvalObjEx((interp),(objPtr),0)
+#   undef Tcl_GlobalEvalObj
+#   define Tcl_GlobalEvalObj(interp,objPtr) \
+	Tcl_EvalObjEx((interp),(objPtr),TCL_EVAL_GLOBAL)
+#endif
+
 #endif /* _TCLDECLS */
diff --git a/generic/tclDictObj.c b/generic/tclDictObj.c
index 3c3e0b1..891f07a 100644
--- a/generic/tclDictObj.c
+++ b/generic/tclDictObj.c
@@ -361,7 +361,7 @@ DupDictInternalRep(
     Tcl_Obj *srcPtr,
     Tcl_Obj *copyPtr)
 {
-    Dict *oldDict = srcPtr->internalRep.otherValuePtr;
+    Dict *oldDict = srcPtr->internalRep.twoPtrValue.ptr1;
     Dict *newDict = ckalloc(sizeof(Dict));
     ChainEntry *cPtr;
 
@@ -396,7 +396,7 @@ DupDictInternalRep(
      * Store in the object.
      */
 
-    copyPtr->internalRep.otherValuePtr = newDict;
+    copyPtr->internalRep.twoPtrValue.ptr1 = newDict;
     copyPtr->typePtr = &tclDictType;
 }
 
@@ -422,14 +422,12 @@ static void
 FreeDictInternalRep(
     Tcl_Obj *dictPtr)
 {
-    Dict *dict = dictPtr->internalRep.otherValuePtr;
+    Dict *dict = dictPtr->internalRep.twoPtrValue.ptr1;
 
     dict->refcount--;
     if (dict->refcount <= 0) {
 	DeleteDict(dict);
     }
-
-    dictPtr->internalRep.otherValuePtr = NULL;	/* Belt and braces! */
     dictPtr->typePtr = NULL;
 }
 
@@ -489,7 +487,7 @@ UpdateStringOfDict(
 {
 #define LOCAL_SIZE 20
     int localFlags[LOCAL_SIZE], *flagPtr = NULL;
-    Dict *dict = dictPtr->internalRep.otherValuePtr;
+    Dict *dict = dictPtr->internalRep.twoPtrValue.ptr1;
     ChainEntry *cPtr;
     Tcl_Obj *keyPtr, *valuePtr;
     int i, length, bytesNeeded = 0;
@@ -715,7 +713,7 @@ SetDictFromAny(
     dict->epoch = 0;
     dict->chain = NULL;
     dict->refcount = 1;
-    objPtr->internalRep.otherValuePtr = dict;
+    objPtr->internalRep.twoPtrValue.ptr1 = dict;
     objPtr->typePtr = &tclDictType;
     return TCL_OK;
 
@@ -784,7 +782,7 @@ TclTraceDictPath(
 	    return NULL;
 	}
     }
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     if (flags & DICT_PATH_UPDATE) {
 	dict->chain = NULL;
     }
@@ -827,7 +825,7 @@ TclTraceDictPath(
 	    }
 	}
 
-	newDict = tmpObj->internalRep.otherValuePtr;
+	newDict = tmpObj->internalRep.twoPtrValue.ptr1;
 	if (flags & DICT_PATH_UPDATE) {
 	    if (Tcl_IsShared(tmpObj)) {
 		TclDecrRefCount(tmpObj);
@@ -835,7 +833,7 @@ TclTraceDictPath(
 		Tcl_IncrRefCount(tmpObj);
 		Tcl_SetHashValue(hPtr, tmpObj);
 		dict->epoch++;
-		newDict = tmpObj->internalRep.otherValuePtr;
+		newDict = tmpObj->internalRep.twoPtrValue.ptr1;
 	    }
 
 	    newDict->chain = dictPtr;
@@ -870,17 +868,17 @@ static void
 InvalidateDictChain(
     Tcl_Obj *dictObj)
 {
-    Dict *dict = dictObj->internalRep.otherValuePtr;
+    Dict *dict = dictObj->internalRep.twoPtrValue.ptr1;
 
     do {
-	Tcl_InvalidateStringRep(dictObj);
+	TclInvalidateStringRep(dictObj);
 	dict->epoch++;
 	dictObj = dict->chain;
 	if (dictObj == NULL) {
 	    break;
 	}
 	dict->chain = NULL;
-	dict = dictObj->internalRep.otherValuePtr;
+	dict = dictObj->internalRep.twoPtrValue.ptr1;
     } while (dict != NULL);
 }
 
@@ -927,9 +925,9 @@ Tcl_DictObjPut(
     }
 
     if (dictPtr->bytes != NULL) {
-	Tcl_InvalidateStringRep(dictPtr);
+	TclInvalidateStringRep(dictPtr);
     }
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     hPtr = CreateChainEntry(dict, keyPtr, &isNew);
     Tcl_IncrRefCount(valuePtr);
     if (!isNew) {
@@ -980,7 +978,7 @@ Tcl_DictObjGet(
 	}
     }
 
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     hPtr = Tcl_FindHashEntry(&dict->table, keyPtr);
     if (hPtr == NULL) {
 	*valuePtrPtr = NULL;
@@ -1029,9 +1027,9 @@ Tcl_DictObjRemove(
     }
 
     if (dictPtr->bytes != NULL) {
-	Tcl_InvalidateStringRep(dictPtr);
+	TclInvalidateStringRep(dictPtr);
     }
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     if (DeleteChainEntry(dict, keyPtr)) {
 	dict->epoch++;
     }
@@ -1071,7 +1069,7 @@ Tcl_DictObjSize(
 	}
     }
 
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     *sizePtr = dict->table.numEntries;
     return TCL_OK;
 }
@@ -1126,7 +1124,7 @@ Tcl_DictObjFirst(
 	}
     }
 
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     cPtr = dict->entryChainHead;
     if (cPtr == NULL) {
 	searchPtr->epoch = -1;
@@ -1301,7 +1299,7 @@ Tcl_DictObjPutKeyList(
 	return TCL_ERROR;
     }
 
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     hPtr = CreateChainEntry(dict, keyv[keyc-1], &isNew);
     Tcl_IncrRefCount(valuePtr);
     if (!isNew) {
@@ -1357,7 +1355,7 @@ Tcl_DictObjRemoveKeyList(
 	return TCL_ERROR;
     }
 
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
     DeleteChainEntry(dict, keyv[keyc-1]);
     InvalidateDictChain(dictPtr);
     return TCL_OK;
@@ -1397,13 +1395,13 @@ Tcl_NewDictObj(void)
     Dict *dict;
 
     TclNewObj(dictPtr);
-    Tcl_InvalidateStringRep(dictPtr);
+    TclInvalidateStringRep(dictPtr);
     dict = ckalloc(sizeof(Dict));
     InitChainTable(dict);
     dict->epoch = 0;
     dict->chain = NULL;
     dict->refcount = 1;
-    dictPtr->internalRep.otherValuePtr = dict;
+    dictPtr->internalRep.twoPtrValue.ptr1 = dict;
     dictPtr->typePtr = &tclDictType;
     return dictPtr;
 #endif
@@ -1446,13 +1444,13 @@ Tcl_DbNewDictObj(
     Dict *dict;
 
     TclDbNewObj(dictPtr, file, line);
-    Tcl_InvalidateStringRep(dictPtr);
+    TclInvalidateStringRep(dictPtr);
     dict = ckalloc(sizeof(Dict));
     InitChainTable(dict);
     dict->epoch = 0;
     dict->chain = NULL;
     dict->refcount = 1;
-    dictPtr->internalRep.otherValuePtr = dict;
+    dictPtr->internalRep.twoPtrValue.ptr1 = dict;
     dictPtr->typePtr = &tclDictType;
     return dictPtr;
 #else /* !TCL_MEM_DEBUG */
@@ -2064,7 +2062,7 @@ DictInfoCmd(
 	    return result;
 	}
     }
-    dict = dictPtr->internalRep.otherValuePtr;
+    dict = dictPtr->internalRep.twoPtrValue.ptr1;
 
     statsStr = Tcl_HashStats(&dict->table);
     Tcl_SetObjResult(interp, Tcl_NewStringObj(statsStr, -1));
@@ -2179,7 +2177,7 @@ DictIncrCmd(
 	}
     }
     if (code == TCL_OK) {
-	Tcl_InvalidateStringRep(dictPtr);
+	TclInvalidateStringRep(dictPtr);
 	valuePtr = Tcl_ObjSetVar2(interp, objv[1], NULL,
 		dictPtr, TCL_LEAVE_ERR_MSG);
 	if (valuePtr == NULL) {
@@ -2268,7 +2266,7 @@ DictLappendCmd(
     if (allocatedValue) {
 	Tcl_DictObjPut(interp, dictPtr, objv[2], valuePtr);
     } else if (dictPtr->bytes != NULL) {
-	Tcl_InvalidateStringRep(dictPtr);
+	TclInvalidateStringRep(dictPtr);
     }
 
     resultPtr = Tcl_ObjSetVar2(interp, objv[1], NULL, dictPtr,
diff --git a/generic/tclEncoding.c b/generic/tclEncoding.c
index 7a55724..2cc55d6 100644
--- a/generic/tclEncoding.c
+++ b/generic/tclEncoding.c
@@ -270,7 +270,7 @@ static int		Iso88591ToUtfProc(ClientData clientData,
 			    int *dstCharsPtr);
 
 /*
- * A Tcl_ObjType for holding a cached Tcl_Encoding in the otherValuePtr field
+ * A Tcl_ObjType for holding a cached Tcl_Encoding in the twoPtrValue.ptr1 field
  * of the intrep. This should help the lifetime of encodings be more useful.
  * See concerns raised in [Bug 1077262].
  */
@@ -313,7 +313,7 @@ Tcl_GetEncodingFromObj(
 	    return TCL_ERROR;
 	}
 	TclFreeIntRep(objPtr);
-	objPtr->internalRep.otherValuePtr = encoding;
+	objPtr->internalRep.twoPtrValue.ptr1 = encoding;
 	objPtr->typePtr = &encodingType;
     }
     *encodingPtr = Tcl_GetEncoding(NULL, name);
@@ -334,7 +334,7 @@ static void
 FreeEncodingIntRep(
     Tcl_Obj *objPtr)
 {
-    Tcl_FreeEncoding(objPtr->internalRep.otherValuePtr);
+    Tcl_FreeEncoding(objPtr->internalRep.twoPtrValue.ptr1);
     objPtr->typePtr = NULL;
 }
 
@@ -353,7 +353,7 @@ DupEncodingIntRep(
     Tcl_Obj *srcPtr,
     Tcl_Obj *dupPtr)
 {
-    dupPtr->internalRep.otherValuePtr = Tcl_GetEncoding(NULL, srcPtr->bytes);
+    dupPtr->internalRep.twoPtrValue.ptr1 = Tcl_GetEncoding(NULL, srcPtr->bytes);
 }
 
 /*
diff --git a/generic/tclEnsemble.c b/generic/tclEnsemble.c
index 058590a..bf9dac2 100644
--- a/generic/tclEnsemble.c
+++ b/generic/tclEnsemble.c
@@ -1718,7 +1718,7 @@ NsEnsembleImplementationCmdNR(
 
 	if (objv[1+ensemblePtr->numParameters]->typePtr==&tclEnsembleCmdType){
 	    EnsembleCmdRep *ensembleCmd = objv[1+ensemblePtr->numParameters]
-		    ->internalRep.otherValuePtr;
+		    ->internalRep.twoPtrValue.ptr1;
 
 	    if (ensembleCmd->nsPtr == ensemblePtr->nsPtr &&
 		    ensembleCmd->epoch == ensemblePtr->epoch &&
@@ -2196,7 +2196,7 @@ EnsembleUnknownCallback(
 	    }
 	    Tcl_AddErrorInfo(interp, "\n    result of "
 		    "ensemble unknown subcommand handler: ");
-	    Tcl_AddErrorInfo(interp, TclGetString(unknownCmd));
+	    Tcl_AppendObjToErrorInfo(interp, unknownCmd);
 	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "UNKNOWN_RESULT",
 		    NULL);
 	} else {
@@ -2238,7 +2238,7 @@ MakeCachedEnsembleCommand(
     int length;
 
     if (objPtr->typePtr == &tclEnsembleCmdType) {
-	ensembleCmd = objPtr->internalRep.otherValuePtr;
+	ensembleCmd = objPtr->internalRep.twoPtrValue.ptr1;
 	Tcl_DecrRefCount(ensembleCmd->realPrefixObj);
 	TclNsDecrRefCount(ensembleCmd->nsPtr);
 	ckfree(ensembleCmd->fullSubcmdName);
@@ -2250,7 +2250,7 @@ MakeCachedEnsembleCommand(
 
 	TclFreeIntRep(objPtr);
 	ensembleCmd = ckalloc(sizeof(EnsembleCmdRep));
-	objPtr->internalRep.otherValuePtr = ensembleCmd;
+	objPtr->internalRep.twoPtrValue.ptr1 = ensembleCmd;
 	objPtr->typePtr = &tclEnsembleCmdType;
     }
 
@@ -2645,7 +2645,7 @@ static void
 FreeEnsembleCmdRep(
     Tcl_Obj *objPtr)
 {
-    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.otherValuePtr;
+    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.twoPtrValue.ptr1;
 
     Tcl_DecrRefCount(ensembleCmd->realPrefixObj);
     ckfree(ensembleCmd->fullSubcmdName);
@@ -2677,12 +2677,12 @@ DupEnsembleCmdRep(
     Tcl_Obj *objPtr,
     Tcl_Obj *copyPtr)
 {
-    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.otherValuePtr;
+    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.twoPtrValue.ptr1;
     EnsembleCmdRep *ensembleCopy = ckalloc(sizeof(EnsembleCmdRep));
     int length = strlen(ensembleCmd->fullSubcmdName);
 
     copyPtr->typePtr = &tclEnsembleCmdType;
-    copyPtr->internalRep.otherValuePtr = ensembleCopy;
+    copyPtr->internalRep.twoPtrValue.ptr1 = ensembleCopy;
     ensembleCopy->nsPtr = ensembleCmd->nsPtr;
     ensembleCopy->epoch = ensembleCmd->epoch;
     ensembleCopy->token = ensembleCmd->token;
@@ -2715,7 +2715,7 @@ static void
 StringOfEnsembleCmdRep(
     Tcl_Obj *objPtr)
 {
-    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.otherValuePtr;
+    EnsembleCmdRep *ensembleCmd = objPtr->internalRep.twoPtrValue.ptr1;
     int length = strlen(ensembleCmd->fullSubcmdName);
 
     objPtr->length = length;
@@ -3056,6 +3056,9 @@ CompileToCompiledCommand(
     Tcl_Parse synthetic;
     Tcl_Token *tokenPtr;
     int result, i;
+    int savedNumCmds = envPtr->numCommands;
+    int savedStackDepth = envPtr->currStackDepth;
+    unsigned savedCodeNext = envPtr->codeNext - envPtr->codeStart;
 
     if (cmdPtr->compileProc == NULL) {
 	return TCL_ERROR;
@@ -3110,6 +3113,17 @@ CompileToCompiledCommand(
     result = cmdPtr->compileProc(interp, &synthetic, cmdPtr, envPtr);
 
     /*
+     * If our target fails to compile, revert the number of commands and the
+     * pointer to the place to issue the next instruction. [Bug 3600328]
+     */
+
+    if (result != TCL_OK) {
+	envPtr->numCommands = savedNumCmds;
+	envPtr->currStackDepth = savedStackDepth;
+	envPtr->codeNext = envPtr->codeStart + savedCodeNext;
+    }
+
+    /*
      * Clean up if necessary.
      */
 
diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index 0b72eb7..2004f4c 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -261,8 +261,11 @@ VarHashCreateVar(
 
 #if TCL_COMPILE_DEBUG
 #define CHECK_STACK()							\
-    ValidatePcAndStackTop(codePtr, pc, CURR_DEPTH, \
-	    /*checkStack*/ auxObjList == NULL)
+    do {								\
+	ValidatePcAndStackTop(codePtr, pc, CURR_DEPTH,			\
+		/*checkStack*/ !(starting || auxObjList));		\
+	starting = 0;							\
+    } while (0)
 #else
 #define CHECK_STACK()
 #endif
@@ -1090,7 +1093,7 @@ CompileExprObj(
     if (objPtr->typePtr == &exprCodeType) {
 	Namespace *namespacePtr = iPtr->varFramePtr->nsPtr;
 
-	codePtr = objPtr->internalRep.otherValuePtr;
+	codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 	if (((Interp *) *codePtr->interpHandle != iPtr)
 		|| (codePtr->compileEpoch != iPtr->compileEpoch)
 		|| (codePtr->nsPtr != namespacePtr)
@@ -1130,7 +1133,7 @@ CompileExprObj(
 	TclInitByteCodeObj(objPtr, &compEnv);
 	objPtr->typePtr = &exprCodeType;
 	TclFreeCompileEnv(&compEnv);
-	codePtr = objPtr->internalRep.otherValuePtr;
+	codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 	if (iPtr->varFramePtr->localCachePtr) {
 	    codePtr->localCachePtr = iPtr->varFramePtr->localCachePtr;
 	    codePtr->localCachePtr->refCount++;
@@ -1202,10 +1205,9 @@ static void
 FreeExprCodeInternalRep(
     Tcl_Obj *objPtr)
 {
-    ByteCode *codePtr = objPtr->internalRep.otherValuePtr;
+    ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 
     objPtr->typePtr = NULL;
-    objPtr->internalRep.otherValuePtr = NULL;
     codePtr->refCount--;
     if (codePtr->refCount <= 0) {
 	TclCleanupByteCode(codePtr);
@@ -1263,7 +1265,7 @@ TclCompileObj(
 	 * here.
 	 */
 
-	codePtr = objPtr->internalRep.otherValuePtr;
+	codePtr = objPtr->internalRep.twoPtrValue.ptr1;
 	if (((Interp *) *codePtr->interpHandle != iPtr)
 		|| (codePtr->compileEpoch != iPtr->compileEpoch)
 		|| (codePtr->nsPtr != namespacePtr)
@@ -1391,7 +1393,7 @@ TclCompileObj(
     iPtr->invokeWord = word;
     TclSetByteCodeFromAny(interp, objPtr, NULL, NULL);
     iPtr->invokeCmdFramePtr = NULL;
-    codePtr = objPtr->internalRep.otherValuePtr;
+    codePtr = objPtr->internalRep.twoPtrValue.ptr1;
     if (iPtr->varFramePtr->localCachePtr) {
 	codePtr->localCachePtr = iPtr->varFramePtr->localCachePtr;
 	codePtr->localCachePtr->refCount++;
@@ -1694,7 +1696,8 @@ TEBCresume(
     Tcl_Obj **tosPtr;		/* Cached pointer to top of evaluation
 				 * stack. */
     const unsigned char *pc;	/* The current program counter. */
-
+    unsigned char inst;         /* The currently running instruction */
+    
     /*
      * Transfer variables - needed only between opcodes, but not while
      * executing an instruction.
@@ -1719,6 +1722,7 @@ TEBCresume(
 #endif
 
 #ifdef TCL_COMPILE_DEBUG
+    int starting = 1;
     traceInstructions = (tclTraceExec == 3);
 #endif
 
@@ -1860,23 +1864,6 @@ TEBCresume(
     }
   cleanup0:
 
-#ifdef TCL_COMPILE_DEBUG
-    /*
-     * Skip the stack depth check if an expansion is in progress.
-     */
-
-    CHECK_STACK();
-    if (traceInstructions) {
-	fprintf(stdout, "%2d: %2d ", iPtr->numLevels, (int) CURR_DEPTH);
-	TclPrintInstruction(codePtr, pc);
-	fflush(stdout);
-    }
-#endif /* TCL_COMPILE_DEBUG */
-
-#ifdef TCL_COMPILE_STATS
-    iPtr->stats.instructionCount[*pc]++;
-#endif
-
     /*
      * Check for asynchronous handlers [Bug 746722]; we do the check every
      * ASYNC_CHECK_COUNT_MASK instruction, of the form (2**n-1).
@@ -1907,8 +1894,6 @@ TEBCresume(
 	checkInterp = 1;
     }
 
-    TCL_DTRACE_INST_NEXT();
-
     /*
      * These two instructions account for 26% of all instructions (according
      * to measurements on tclbench by Ben Vitale
@@ -1918,13 +1903,53 @@ TEBCresume(
      * reduces total obj size.
      */
 
-    if (*pc == INST_LOAD_SCALAR1) {
-	goto instLoadScalar1;
-    } else if (*pc == INST_PUSH1) {
-	goto instPush1Peephole;
+    inst = *pc;
+    
+    peepholeStart:
+#ifdef TCL_COMPILE_STATS
+    iPtr->stats.instructionCount[*pc]++;
+#endif
+
+#ifdef TCL_COMPILE_DEBUG
+    /*
+     * Skip the stack depth check if an expansion is in progress.
+     */
+
+    CHECK_STACK();
+    if (traceInstructions) {
+	fprintf(stdout, "%2d: %2d ", iPtr->numLevels, (int) CURR_DEPTH);
+	TclPrintInstruction(codePtr, pc);
+	fflush(stdout);
     }
+#endif /* TCL_COMPILE_DEBUG */
 
-    switch (*pc) {
+    TCL_DTRACE_INST_NEXT();
+    
+    if (inst == INST_LOAD_SCALAR1) {
+	goto instLoadScalar1;
+    } else if (inst == INST_PUSH1) {
+	PUSH_OBJECT(codePtr->objArrayPtr[TclGetUInt1AtPtr(pc+1)]);
+	TRACE_WITH_OBJ(("%u => ", TclGetInt1AtPtr(pc+1)), OBJ_AT_TOS);
+	inst = *(pc += 2);
+	goto peepholeStart;
+    } else if (inst == INST_START_CMD) {
+	/*
+	 * Peephole: do not run INST_START_CMD, just skip it
+	 */
+	
+	iPtr->cmdCount += TclGetUInt4AtPtr(pc+5);
+	if (checkInterp) {
+	    checkInterp = 0;
+	    if ((codePtr->compileEpoch != iPtr->compileEpoch)
+		    || (codePtr->nsEpoch != iPtr->varFramePtr->nsPtr->resolverEpoch)) {
+		goto instStartCmdFailed;
+	    }
+	}
+	inst = *(pc += 9);
+	goto peepholeStart;
+    }
+    
+    switch (inst) {
     case INST_SYNTAX:
     case INST_RETURN_IMM: {
 	int code = TclGetInt4AtPtr(pc+1);
@@ -2074,23 +2099,6 @@ TEBCresume(
 	(void) POP_OBJECT();
 	goto abnormalReturn;
 
-    case INST_PUSH1:
-    instPush1Peephole:
-	PUSH_OBJECT(codePtr->objArrayPtr[TclGetUInt1AtPtr(pc+1)]);
-	TRACE_WITH_OBJ(("%u => ", TclGetInt1AtPtr(pc+1)), OBJ_AT_TOS);
-	pc += 2;
-#if !TCL_COMPILE_DEBUG
-	/*
-	 * Runtime peephole optimisation: check if we are pushing again.
-	 */
-
-	if (*pc == INST_PUSH1) {
-	    TCL_DTRACE_INST_NEXT();
-	    goto instPush1Peephole;
-	}
-#endif
-	NEXT_INST_F(0, 0, 0);
-
     case INST_PUSH4:
 	objResultPtr = codePtr->objArrayPtr[TclGetUInt4AtPtr(pc+1)];
 	TRACE_WITH_OBJ(("%u => ", TclGetUInt4AtPtr(pc+1)), objResultPtr);
@@ -2100,68 +2108,10 @@ TEBCresume(
 	TRACE_WITH_OBJ(("=> discarding "), OBJ_AT_TOS);
 	objPtr = POP_OBJECT();
 	TclDecrRefCount(objPtr);
-
-	/*
-	 * Runtime peephole optimisation: an INST_POP is scheduled at the end
-	 * of most commands. If the next instruction is an INST_START_CMD,
-	 * fall through to it.
-	 */
-
-	pc++;
-#if !TCL_COMPILE_DEBUG
-	if (*pc == INST_START_CMD) {
-	    TCL_DTRACE_INST_NEXT();
-	    goto instStartCmdPeephole;
-	}
-#endif
-	NEXT_INST_F(0, 0, 0);
-
-    case INST_START_CMD:
-#if !TCL_COMPILE_DEBUG
-    instStartCmdPeephole:
-#endif
-	/*
-	 * Remark that if the interpreter is marked for deletion its
-	 * compileEpoch is modified, so that the epoch check also verifies
-	 * that the interp is not deleted. If no outside call has been made
-	 * since the last check, it is safe to omit the check.
-	 */
-
-	iPtr->cmdCount += TclGetUInt4AtPtr(pc+5);
-	if (!checkInterp) {
-	    goto instStartCmdOK;
-	} else if (((codePtr->compileEpoch == iPtr->compileEpoch)
-		&& (codePtr->nsEpoch == iPtr->varFramePtr->nsPtr->resolverEpoch))
-		|| (codePtr->flags & TCL_BYTECODE_PRECOMPILED)) {
-	    checkInterp = 0;
-	instStartCmdOK:
-	    NEXT_INST_F(9, 0, 0);
-	} else {
-	    const char *bytes;
-
-	    length = 0;
-
-	    /*
-	     * We used to switch to direct eval; for NRE-awareness we now
-	     * compile and eval the command so that this evaluation does not
-	     * add a new TEBC instance. [Bug 2910748]
-	     */
-
-	    if (TclInterpReady(interp) == TCL_ERROR) {
-		goto gotError;
-	    }
-
-	    codePtr->flags |= TCL_BYTECODE_RECOMPILE;
-	    bytes = GetSrcInfoForPc(pc, codePtr, &length, NULL);
-	    opnd = TclGetUInt4AtPtr(pc+1);
-	    pc += (opnd-1);
-	    PUSH_OBJECT(Tcl_NewStringObj(bytes, length));
-	    goto instEvalStk;
-	}
+	NEXT_INST_F(1, 0, 0);
 
     case INST_NOP:
-	pc += 1;
-	goto cleanup0;
+	NEXT_INST_F(1, 0, 0);
 
     case INST_DUP:
 	objResultPtr = OBJ_AT_TOS;
@@ -3116,8 +3066,8 @@ TEBCresume(
 	varPtr = TclObjLookupVarEx(interp, objPtr, part2Ptr,
 		TCL_LEAVE_ERR_MSG, "read", 1, 1, &arrayPtr);
 	if (!varPtr) {
-	    Tcl_AddObjErrorInfo(interp,
-		    "\n    (reading value of variable to increment)", -1);
+	    Tcl_AddErrorInfo(interp,
+		    "\n    (reading value of variable to increment)");
 	    TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp))));
 	    Tcl_DecrRefCount(incrPtr);
 	    goto gotError;
@@ -6657,6 +6607,42 @@ TEBCresume(
     ckfree(TD);	/* free my stack */
 
     return result;
+
+    /*
+     * INST_START_CMD failure case removed where it doesn't bother that much
+     *
+     * Remark that if the interpreter is marked for deletion its
+     * compileEpoch is modified, so that the epoch check also verifies
+     * that the interp is not deleted. If no outside call has been made
+     * since the last check, it is safe to omit the check.
+
+     * case INST_START_CMD:
+     */
+
+	instStartCmdFailed:
+	{
+	    const char *bytes;
+
+	    checkInterp = 1;
+	    length = 0;
+
+	    /*
+	     * We used to switch to direct eval; for NRE-awareness we now
+	     * compile and eval the command so that this evaluation does not
+	     * add a new TEBC instance. [Bug 2910748]
+	     */
+
+	    if (TclInterpReady(interp) == TCL_ERROR) {
+		goto gotError;
+	    }
+
+	    codePtr->flags |= TCL_BYTECODE_RECOMPILE;
+	    bytes = GetSrcInfoForPc(pc, codePtr, &length, NULL);
+	    opnd = TclGetUInt4AtPtr(pc+1);
+	    pc += (opnd-1);
+	    PUSH_OBJECT(Tcl_NewStringObj(bytes, length));
+	    goto instEvalStk;
+	}
 }
 
 #undef codePtr
diff --git a/generic/tclGet.c b/generic/tclGet.c
index 4c19b55..97e8c7b 100644
--- a/generic/tclGet.c
+++ b/generic/tclGet.c
@@ -137,7 +137,7 @@ Tcl_GetBoolean(
     obj.length = strlen(src);
     obj.typePtr = NULL;
 
-    code = Tcl_ConvertToType(interp, &obj, &tclBooleanType);
+    code = TclSetBooleanFromAny(interp, &obj);
     if (obj.refCount > 1) {
 	Tcl_Panic("invalid sharing of Tcl_Obj on C stack");
     }
diff --git a/generic/tclIO.c b/generic/tclIO.c
index 715c1ef..f340d59 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -221,9 +221,9 @@ static const Tcl_ObjType tclChannelType = {
 };
 
 #define GET_CHANNELSTATE(objPtr) \
-    ((ChannelState *) (objPtr)->internalRep.otherValuePtr)
+    ((ChannelState *) (objPtr)->internalRep.twoPtrValue.ptr1)
 #define SET_CHANNELSTATE(objPtr, storePtr) \
-    ((objPtr)->internalRep.otherValuePtr = (void *) (storePtr))
+    ((objPtr)->internalRep.twoPtrValue.ptr1 = (void *) (storePtr))
 #define GET_CHANNELINTERP(objPtr) \
     ((Interp *) (objPtr)->internalRep.twoPtrValue.ptr2)
 #define SET_CHANNELINTERP(objPtr, storePtr) \
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c
index ab08353..25ed57c 100644
--- a/generic/tclIOUtil.c
+++ b/generic/tclIOUtil.c
@@ -18,9 +18,6 @@
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  */
 
-#if defined(HAVE_SYS_STAT_H) && !defined _WIN32
-#   include <sys/stat.h>
-#endif
 #include "tclInt.h"
 #ifdef __WIN32__
 #   include "tclWinInt.h"
diff --git a/generic/tclIndexObj.c b/generic/tclIndexObj.c
index a023401..057246b 100644
--- a/generic/tclIndexObj.c
+++ b/generic/tclIndexObj.c
@@ -53,7 +53,7 @@ static const Tcl_ObjType indexType = {
 
 /*
  * The definition of the internal representation of the "index" object; The
- * internalRep.otherValuePtr field of an object of "index" type will be a
+ * internalRep.twoPtrValue.ptr1 field of an object of "index" type will be a
  * pointer to one of these structures.
  *
  * Keep this structure declaration in sync with tclTestObj.c
@@ -69,12 +69,12 @@ typedef struct {
  * The following macros greatly simplify moving through a table...
  */
 
-#define STRING_AT(table, offset, index) \
-	(*((const char *const *)(((char *)(table)) + ((offset) * (index)))))
+#define STRING_AT(table, offset) \
+	(*((const char *const *)(((char *)(table)) + (offset))))
 #define NEXT_ENTRY(table, offset) \
-	(&(STRING_AT(table, offset, 1)))
+	(&(STRING_AT(table, offset)))
 #define EXPAND_OF(indexRep) \
-	STRING_AT((indexRep)->tablePtr, (indexRep)->offset, (indexRep)->index)
+	STRING_AT((indexRep)->tablePtr, (indexRep)->offset*(indexRep)->index)
 
 /*
  *----------------------------------------------------------------------
@@ -121,7 +121,7 @@ Tcl_GetIndexFromObj(
      */
 
     if (objPtr->typePtr == &indexType) {
-	IndexRep *indexRep = objPtr->internalRep.otherValuePtr;
+	IndexRep *indexRep = objPtr->internalRep.twoPtrValue.ptr1;
 
 	/*
 	 * Here's hoping we don't get hit by unfortunate packing constraints
@@ -238,7 +238,7 @@ GetIndexFromObjList(
  *	a proper match, then TCL_ERROR is returned and an error message is
  *	left in interp's result (unless interp is NULL). The msg argument is
  *	used in the error message; for example, if msg has the value "option"
- *	then the error message will say something flag 'bad option "foo": must
+ *	then the error message will say something like 'bad option "foo": must
  *	be ...'
  *
  * Side effects:
@@ -270,12 +270,16 @@ Tcl_GetIndexFromObjStruct(
     Tcl_Obj *resultPtr;
     IndexRep *indexRep;
 
+    /* Protect against invalid values, like -1 or 0. */
+    if (offset < (int)sizeof(char *)) {
+	offset = (int)sizeof(char *);
+    }
     /*
      * See if there is a valid cached result from a previous lookup.
      */
 
     if (objPtr->typePtr == &indexType) {
-	indexRep = objPtr->internalRep.otherValuePtr;
+	indexRep = objPtr->internalRep.twoPtrValue.ptr1;
 	if (indexRep->tablePtr==tablePtr && indexRep->offset==offset) {
 	    *indexPtr = indexRep->index;
 	    return TCL_OK;
@@ -336,11 +340,11 @@ Tcl_GetIndexFromObjStruct(
      */
 
     if (objPtr->typePtr == &indexType) {
-	indexRep = objPtr->internalRep.otherValuePtr;
+	indexRep = objPtr->internalRep.twoPtrValue.ptr1;
     } else {
 	TclFreeIntRep(objPtr);
 	indexRep = ckalloc(sizeof(IndexRep));
-	objPtr->internalRep.otherValuePtr = indexRep;
+	objPtr->internalRep.twoPtrValue.ptr1 = indexRep;
 	objPtr->typePtr = &indexType;
     }
     indexRep->tablePtr = (void *) tablePtr;
@@ -443,7 +447,7 @@ static void
 UpdateStringOfIndex(
     Tcl_Obj *objPtr)
 {
-    IndexRep *indexRep = objPtr->internalRep.otherValuePtr;
+    IndexRep *indexRep = objPtr->internalRep.twoPtrValue.ptr1;
     register char *buf;
     register unsigned len;
     register const char *indexStr = EXPAND_OF(indexRep);
@@ -478,11 +482,11 @@ DupIndex(
     Tcl_Obj *srcPtr,
     Tcl_Obj *dupPtr)
 {
-    IndexRep *srcIndexRep = srcPtr->internalRep.otherValuePtr;
+    IndexRep *srcIndexRep = srcPtr->internalRep.twoPtrValue.ptr1;
     IndexRep *dupIndexRep = ckalloc(sizeof(IndexRep));
 
     memcpy(dupIndexRep, srcIndexRep, sizeof(IndexRep));
-    dupPtr->internalRep.otherValuePtr = dupIndexRep;
+    dupPtr->internalRep.twoPtrValue.ptr1 = dupIndexRep;
     dupPtr->typePtr = &indexType;
 }
 
@@ -507,7 +511,7 @@ static void
 FreeIndex(
     Tcl_Obj *objPtr)
 {
-    ckfree(objPtr->internalRep.otherValuePtr);
+    ckfree(objPtr->internalRep.twoPtrValue.ptr1);
     objPtr->typePtr = NULL;
 }
 
@@ -948,13 +952,13 @@ Tcl_WrongNumArgs(
 
 	    if (origObjv[i]->typePtr == &indexType) {
 		register IndexRep *indexRep =
-			origObjv[i]->internalRep.otherValuePtr;
+			origObjv[i]->internalRep.twoPtrValue.ptr1;
 
 		elementStr = EXPAND_OF(indexRep);
 		elemLen = strlen(elementStr);
 	    } else if (origObjv[i]->typePtr == &tclEnsembleCmdType) {
 		register EnsembleCmdRep *ecrPtr =
-			origObjv[i]->internalRep.otherValuePtr;
+			origObjv[i]->internalRep.twoPtrValue.ptr1;
 
 		elementStr = ecrPtr->fullSubcmdName;
 		elemLen = strlen(elementStr);
@@ -1002,12 +1006,12 @@ Tcl_WrongNumArgs(
 	 */
 
 	if (objv[i]->typePtr == &indexType) {
-	    register IndexRep *indexRep = objv[i]->internalRep.otherValuePtr;
+	    register IndexRep *indexRep = objv[i]->internalRep.twoPtrValue.ptr1;
 
 	    Tcl_AppendStringsToObj(objPtr, EXPAND_OF(indexRep), NULL);
 	} else if (objv[i]->typePtr == &tclEnsembleCmdType) {
 	    register EnsembleCmdRep *ecrPtr =
-		    objv[i]->internalRep.otherValuePtr;
+		    objv[i]->internalRep.twoPtrValue.ptr1;
 
 	    Tcl_AppendStringsToObj(objPtr, ecrPtr->fullSubcmdName, NULL);
 	} else {
diff --git a/generic/tclInt.decls b/generic/tclInt.decls
index af6cc6e..a18517a 100644
--- a/generic/tclInt.decls
+++ b/generic/tclInt.decls
@@ -626,14 +626,14 @@ declare 156 {
 declare 157 {
     Var *TclVarTraceExists(Tcl_Interp *interp, const char *varName)
 }
-# REMOVED - use public Tcl_SetStartupScript()
-#declare 158 {
-#    void TclSetStartupScriptFileName(const char *filename)
-#}
-# REMOVED - use public Tcl_GetStartupScript()
-#declare 159 {
-#    const char *TclGetStartupScriptFileName(void)
-#}
+# REMOVED (except from stub table) - use public Tcl_SetStartupScript()
+declare 158 {
+    void TclSetStartupScriptFileName(const char *filename)
+}
+# REMOVED (except from stub table) - use public Tcl_GetStartupScript()
+declare 159 {
+    const char *TclGetStartupScriptFileName(void)
+}
 #declare 160 {
 #    int TclpMatchFilesTypes(Tcl_Interp *interp, char *separators,
 #	    Tcl_DString *dirPtr, char *pattern, char *tail,
@@ -678,14 +678,14 @@ declare 166 {
 }
 
 # VFS-aware versions of Tcl*StartupScriptFileName (158 and 159 above)
-# REMOVED - use public Tcl_SetStartupScript()
-#declare 167 {
-#    void TclSetStartupScriptPath(Tcl_Obj *pathPtr)
-#}
-# REMOVED - use public Tcl_GetStartupScript()
-#declare 168 {
-#    Tcl_Obj *TclGetStartupScriptPath(void)
-#}
+# REMOVED (except from stub table) - use public Tcl_SetStartupScript()
+declare 167 {
+    void TclSetStartupScriptPath(Tcl_Obj *pathPtr)
+}
+# REMOVED (except from stub table) - use public Tcl_GetStartupScript()
+declare 168 {
+    Tcl_Obj *TclGetStartupScriptPath(void)
+}
 # variant of Tcl_UtfNCmp that takes n as bytes, not chars
 declare 169 {
     int TclpUtfNcmp2(const char *s1, const char *s2, unsigned long n)
@@ -731,13 +731,13 @@ declare 177 {
     void TclVarErrMsg(Tcl_Interp *interp, const char *part1, const char *part2,
 	    const char *operation, const char *reason)
 }
-# TIP 338 made these public - now declared in tcl.h
-#declare 178 {
-#    void Tcl_SetStartupScript(Tcl_Obj *pathPtr, const char *encodingName)
-#}
-#declare 179 {
-#    Tcl_Obj *Tcl_GetStartupScript(const char **encodingNamePtr)
-#}
+# TIP 338 made these public - now declared in tcl.h too
+declare 178 {
+    void Tcl_SetStartupScript(Tcl_Obj *pathPtr, const char *encodingName)
+}
+declare 179 {
+    Tcl_Obj *Tcl_GetStartupScript(const char **encodingNamePtr)
+}
 
 # REMOVED
 # Allocate lists without copying arrays
diff --git a/generic/tclInt.h b/generic/tclInt.h
index 2a9ffc4..45550e2 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -396,7 +396,7 @@ struct NamespacePathEntry {
 
 /*
  * The data cached in an ensemble subcommand's Tcl_Obj rep (reference in
- * otherValuePtr field). This structure is not shared between Tcl_Objs
+ * twoPtrValue.ptr1 field). This structure is not shared between Tcl_Objs
  * referring to the same subcommand, even where one is a duplicate of another.
  */
 
@@ -3069,6 +3069,7 @@ MODULE_SCOPE void	TclSetBgErrorHandler(Tcl_Interp *interp,
 			    Tcl_Obj *cmdPrefix);
 MODULE_SCOPE void	TclSetBignumIntRep(Tcl_Obj *objPtr,
 			    mp_int *bignumValue);
+MODULE_SCOPE int	TclSetBooleanFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
 MODULE_SCOPE void	TclSetCmdNameObj(Tcl_Interp *interp, Tcl_Obj *objPtr,
 			    Command *cmdPtr);
 MODULE_SCOPE void	TclSetDuplicateObj(Tcl_Obj *dupPtr, Tcl_Obj *objPtr);
diff --git a/generic/tclIntDecls.h b/generic/tclIntDecls.h
index 7981c18..5569c79 100644
--- a/generic/tclIntDecls.h
+++ b/generic/tclIntDecls.h
@@ -41,6 +41,8 @@
 #undef Tcl_FindCommand
 #undef Tcl_GetCommandFromObj
 #undef Tcl_GetCommandFullName
+#undef Tcl_SetStartupScript
+#undef Tcl_GetStartupScript
 
 /*
  * WARNING: This file is automatically generated by the tools/genStubs.tcl
@@ -390,8 +392,10 @@ EXTERN void		TclRegError(Tcl_Interp *interp, const char *msg,
 /* 157 */
 EXTERN Var *		TclVarTraceExists(Tcl_Interp *interp,
 				const char *varName);
-/* Slot 158 is reserved */
-/* Slot 159 is reserved */
+/* 158 */
+EXTERN void		TclSetStartupScriptFileName(const char *filename);
+/* 159 */
+EXTERN const char *	TclGetStartupScriptFileName(void);
 /* Slot 160 is reserved */
 /* 161 */
 EXTERN int		TclChannelTransform(Tcl_Interp *interp,
@@ -409,8 +413,10 @@ EXTERN void		TclpSetInitialEncodings(void);
 EXTERN int		TclListObjSetElement(Tcl_Interp *interp,
 				Tcl_Obj *listPtr, int index,
 				Tcl_Obj *valuePtr);
-/* Slot 167 is reserved */
-/* Slot 168 is reserved */
+/* 167 */
+EXTERN void		TclSetStartupScriptPath(Tcl_Obj *pathPtr);
+/* 168 */
+EXTERN Tcl_Obj *	TclGetStartupScriptPath(void);
 /* 169 */
 EXTERN int		TclpUtfNcmp2(const char *s1, const char *s2,
 				unsigned long n);
@@ -442,8 +448,11 @@ EXTERN void		TclCleanupVar(Var *varPtr, Var *arrayPtr);
 EXTERN void		TclVarErrMsg(Tcl_Interp *interp, const char *part1,
 				const char *part2, const char *operation,
 				const char *reason);
-/* Slot 178 is reserved */
-/* Slot 179 is reserved */
+/* 178 */
+EXTERN void		Tcl_SetStartupScript(Tcl_Obj *pathPtr,
+				const char *encodingName);
+/* 179 */
+EXTERN Tcl_Obj *	Tcl_GetStartupScript(const char **encodingNamePtr);
 /* Slot 180 is reserved */
 /* Slot 181 is reserved */
 /* 182 */
@@ -757,8 +766,8 @@ typedef struct TclIntStubs {
     void (*reserved155)(void);
     void (*tclRegError) (Tcl_Interp *interp, const char *msg, int status); /* 156 */
     Var * (*tclVarTraceExists) (Tcl_Interp *interp, const char *varName); /* 157 */
-    void (*reserved158)(void);
-    void (*reserved159)(void);
+    void (*tclSetStartupScriptFileName) (const char *filename); /* 158 */
+    const char * (*tclGetStartupScriptFileName) (void); /* 159 */
     void (*reserved160)(void);
     int (*tclChannelTransform) (Tcl_Interp *interp, Tcl_Channel chan, Tcl_Obj *cmdObjPtr); /* 161 */
     void (*tclChannelEventScriptInvoker) (ClientData clientData, int flags); /* 162 */
@@ -766,8 +775,8 @@ typedef struct TclIntStubs {
     void (*tclExpandCodeArray) (void *envPtr); /* 164 */
     void (*tclpSetInitialEncodings) (void); /* 165 */
     int (*tclListObjSetElement) (Tcl_Interp *interp, Tcl_Obj *listPtr, int index, Tcl_Obj *valuePtr); /* 166 */
-    void (*reserved167)(void);
-    void (*reserved168)(void);
+    void (*tclSetStartupScriptPath) (Tcl_Obj *pathPtr); /* 167 */
+    Tcl_Obj * (*tclGetStartupScriptPath) (void); /* 168 */
     int (*tclpUtfNcmp2) (const char *s1, const char *s2, unsigned long n); /* 169 */
     int (*tclCheckInterpTraces) (Tcl_Interp *interp, const char *command, int numChars, Command *cmdPtr, int result, int traceFlags, int objc, Tcl_Obj *const objv[]); /* 170 */
     int (*tclCheckExecutionTraces) (Tcl_Interp *interp, const char *command, int numChars, Command *cmdPtr, int result, int traceFlags, int objc, Tcl_Obj *const objv[]); /* 171 */
@@ -777,8 +786,8 @@ typedef struct TclIntStubs {
     int (*tclCallVarTraces) (Interp *iPtr, Var *arrayPtr, Var *varPtr, const char *part1, const char *part2, int flags, int leaveErrMsg); /* 175 */
     void (*tclCleanupVar) (Var *varPtr, Var *arrayPtr); /* 176 */
     void (*tclVarErrMsg) (Tcl_Interp *interp, const char *part1, const char *part2, const char *operation, const char *reason); /* 177 */
-    void (*reserved178)(void);
-    void (*reserved179)(void);
+    void (*tcl_SetStartupScript) (Tcl_Obj *pathPtr, const char *encodingName); /* 178 */
+    Tcl_Obj * (*tcl_GetStartupScript) (const char **encodingNamePtr); /* 179 */
     void (*reserved180)(void);
     void (*reserved181)(void);
     struct tm * (*tclpLocaltime) (const time_t *clock); /* 182 */
@@ -1119,8 +1128,10 @@ extern const TclIntStubs *tclIntStubsPtr;
 	(tclIntStubsPtr->tclRegError) /* 156 */
 #define TclVarTraceExists \
 	(tclIntStubsPtr->tclVarTraceExists) /* 157 */
-/* Slot 158 is reserved */
-/* Slot 159 is reserved */
+#define TclSetStartupScriptFileName \
+	(tclIntStubsPtr->tclSetStartupScriptFileName) /* 158 */
+#define TclGetStartupScriptFileName \
+	(tclIntStubsPtr->tclGetStartupScriptFileName) /* 159 */
 /* Slot 160 is reserved */
 #define TclChannelTransform \
 	(tclIntStubsPtr->tclChannelTransform) /* 161 */
@@ -1134,8 +1145,10 @@ extern const TclIntStubs *tclIntStubsPtr;
 	(tclIntStubsPtr->tclpSetInitialEncodings) /* 165 */
 #define TclListObjSetElement \
 	(tclIntStubsPtr->tclListObjSetElement) /* 166 */
-/* Slot 167 is reserved */
-/* Slot 168 is reserved */
+#define TclSetStartupScriptPath \
+	(tclIntStubsPtr->tclSetStartupScriptPath) /* 167 */
+#define TclGetStartupScriptPath \
+	(tclIntStubsPtr->tclGetStartupScriptPath) /* 168 */
 #define TclpUtfNcmp2 \
 	(tclIntStubsPtr->tclpUtfNcmp2) /* 169 */
 #define TclCheckInterpTraces \
@@ -1153,8 +1166,10 @@ extern const TclIntStubs *tclIntStubsPtr;
 	(tclIntStubsPtr->tclCleanupVar) /* 176 */
 #define TclVarErrMsg \
 	(tclIntStubsPtr->tclVarErrMsg) /* 177 */
-/* Slot 178 is reserved */
-/* Slot 179 is reserved */
+#define Tcl_SetStartupScript \
+	(tclIntStubsPtr->tcl_SetStartupScript) /* 178 */
+#define Tcl_GetStartupScript \
+	(tclIntStubsPtr->tcl_GetStartupScript) /* 179 */
 /* Slot 180 is reserved */
 /* Slot 181 is reserved */
 #define TclpLocaltime \
@@ -1276,9 +1291,19 @@ extern const TclIntStubs *tclIntStubsPtr;
 #undef TCL_STORAGE_CLASS
 #define TCL_STORAGE_CLASS DLLIMPORT
 
+#undef TclGetStartupScriptFileName
+#undef TclSetStartupScriptFileName
+#undef TclGetStartupScriptPath
+#undef TclSetStartupScriptPath
 #undef TclBackgroundException
 
 #if defined(USE_TCL_STUBS) && defined(TCL_NO_DEPRECATED)
+#   undef Tcl_SetStartupScript
+#   define Tcl_SetStartupScript \
+	    (tclStubsPtr->tcl_SetStartupScript) /* 622 */
+#   undef Tcl_GetStartupScript
+#   define Tcl_GetStartupScript \
+	    (tclStubsPtr->tcl_GetStartupScript) /* 623 */
 #   undef Tcl_CreateNamespace
 #   define Tcl_CreateNamespace \
 	   (tclStubsPtr->tcl_CreateNamespace) /* 506 */
diff --git a/generic/tclListObj.c b/generic/tclListObj.c
index 07d2644..fccec0a 100644
--- a/generic/tclListObj.c
+++ b/generic/tclListObj.c
@@ -243,7 +243,7 @@ Tcl_NewListObj(
      * Now create the object.
      */
 
-    Tcl_InvalidateStringRep(listPtr);
+    TclInvalidateStringRep(listPtr);
     ListSetIntRep(listPtr, listRepPtr);
     return listPtr;
 }
@@ -308,7 +308,7 @@ Tcl_DbNewListObj(
      * Now create the object.
      */
 
-    Tcl_InvalidateStringRep(listPtr);
+    TclInvalidateStringRep(listPtr);
     ListSetIntRep(listPtr, listRepPtr);
 
     return listPtr;
@@ -368,7 +368,7 @@ Tcl_SetListObj(
      */
 
     TclFreeIntRep(objPtr);
-    Tcl_InvalidateStringRep(objPtr);
+    TclInvalidateStringRep(objPtr);
 
     /*
      * Set the object's type to "list" and initialize the internal rep.
@@ -704,7 +704,7 @@ Tcl_ListObjAppendElement(
      * representation has changed.
      */
 
-    Tcl_InvalidateStringRep(listPtr);
+    TclInvalidateStringRep(listPtr);
     return TCL_OK;
 }
 
@@ -1064,7 +1064,7 @@ Tcl_ListObjReplace(
      * reflects the list's internal representation.
      */
 
-    Tcl_InvalidateStringRep(listPtr);
+    TclInvalidateStringRep(listPtr);
     return TCL_OK;
 }
 
@@ -1530,7 +1530,7 @@ TclLsetFlat(
 	     * containing lists.
 	     */
 
-	    Tcl_InvalidateStringRep(objPtr);
+	    TclInvalidateStringRep(objPtr);
 	}
 
 	/*
@@ -1566,7 +1566,7 @@ TclLsetFlat(
     } else {
 	TclListObjSetElement(NULL, subListPtr, index, valuePtr);
     }
-    Tcl_InvalidateStringRep(subListPtr);
+    TclInvalidateStringRep(subListPtr);
     Tcl_IncrRefCount(retValuePtr);
     return retValuePtr;
 }
@@ -1743,8 +1743,6 @@ FreeListInternalRep(
 	ckfree(listRepPtr);
     }
 
-    listPtr->internalRep.twoPtrValue.ptr1 = NULL;
-    listPtr->internalRep.twoPtrValue.ptr2 = NULL;
     listPtr->typePtr = NULL;
 }
 
diff --git a/generic/tclLoadNone.c b/generic/tclLoadNone.c
index f030d89..5a2dc53 100644
--- a/generic/tclLoadNone.c
+++ b/generic/tclLoadNone.c
@@ -82,6 +82,39 @@ TclGuessPackageName(
 }
 
 /*
+ * These functions are fallbacks if we somehow determine that the platform can
+ * do loading from memory but the user wishes to disable it. They just report
+ * (gracefully) that they fail.
+ */
+
+#ifdef TCL_LOAD_FROM_MEMORY
+
+MODULE_SCOPE void *
+TclpLoadMemoryGetBuffer(
+    Tcl_Interp *interp,		/* Dummy: unused by this implementation */
+    int size)			/* Dummy: unused by this implementation */
+{
+    return NULL;
+}
+
+MODULE_SCOPE int
+TclpLoadMemory(
+    Tcl_Interp *interp,		/* Used for error reporting. */
+    void *buffer,		/* Dummy: unused by this implementation */
+    int size,			/* Dummy: unused by this implementation */
+    int codeSize,		/* Dummy: unused by this implementation */
+    Tcl_LoadHandle *loadHandle,	/* Dummy: unused by this implementation */
+    Tcl_FSUnloadFileProc **unloadProcPtr)
+				/* Dummy: unused by this implementation */
+{
+    Tcl_SetResult(interp, "dynamic loading from memory is not available "
+	    "on this system", TCL_STATIC);
+    return TCL_ERROR;
+}
+
+#endif /* TCL_LOAD_FROM_MEMORY */
+
+/*
  * Local Variables:
  * mode: c
  * c-basic-offset: 4
diff --git a/generic/tclOO.c b/generic/tclOO.c
index d6d2d6a..cb22de6 100644
--- a/generic/tclOO.c
+++ b/generic/tclOO.c
@@ -843,7 +843,7 @@ ObjectRenamedTrace(
 	    result = Tcl_NRCallObjProc(interp, TclOOInvokeContext,
 		    contextPtr, 0, NULL);
 	    if (result != TCL_OK) {
-		Tcl_BackgroundError(interp);
+		Tcl_BackgroundException(interp, result);
 	    }
 	    Tcl_RestoreInterpState(interp, state);
 	    TclOODeleteContext(contextPtr);
diff --git a/generic/tclOOBasic.c b/generic/tclOOBasic.c
index 0676618..f8cd1a4 100644
--- a/generic/tclOOBasic.c
+++ b/generic/tclOOBasic.c
@@ -687,52 +687,51 @@ TclOO_Object_VarName(
     int objc,			/* Number of arguments. */
     Tcl_Obj *const *objv)	/* The actual arguments. */
 {
-    Interp *iPtr = (Interp *) interp;
     Var *varPtr, *aryVar;
-    Tcl_Obj *varNamePtr;
+    Tcl_Obj *varNamePtr, *argPtr;
+    const char *arg;
 
     if (Tcl_ObjectContextSkippedArgs(context)+1 != objc) {
 	Tcl_WrongNumArgs(interp, Tcl_ObjectContextSkippedArgs(context), objv,
 		"varName");
 	return TCL_ERROR;
     }
+    argPtr = objv[objc-1];
+    arg = Tcl_GetString(argPtr);
 
     /*
-     * Switch to the object's namespace for the duration of this call. Like
-     * this, the variable is looked up in the namespace of the object, and not
-     * in the namespace of the caller. Otherwise this would only work if the
-     * caller was a method of the object itself, which might not be true if
-     * the method was exported. This is a bit of a hack, but the simplest way
-     * to do this (pushing a stack frame would be horribly expensive by
-     * comparison, and is only done when we'd otherwise interfere with the
-     * global namespace).
+     * Convert the variable name to fully-qualified form if it wasn't already.
+     * This has to be done prior to lookup because we can run into problems
+     * with resolvers otherwise. [Bug 3603695]
+     *
+     * We still need to do the lookup; the variable could be linked to another
+     * variable and we want the target's name.
      */
 
-    if (iPtr->varFramePtr == NULL) {
-	Tcl_CallFrame *dummyFrame;
-
-	TclPushStackFrame(interp, &dummyFrame,
-		Tcl_GetObjectNamespace(Tcl_ObjectContextObject(context)),0);
-	varPtr = TclObjLookupVar(interp, objv[objc-1], NULL,
-		TCL_NAMESPACE_ONLY|TCL_LEAVE_ERR_MSG, "refer to",1,1,&aryVar);
-	TclPopStackFrame(interp);
+    if (arg[0] == ':' && arg[1] == ':') {
+	varNamePtr = argPtr;
     } else {
-	Namespace *savedNsPtr;
-
-	savedNsPtr = iPtr->varFramePtr->nsPtr;
-	iPtr->varFramePtr->nsPtr = (Namespace *)
+	Tcl_Namespace *namespacePtr =
 		Tcl_GetObjectNamespace(Tcl_ObjectContextObject(context));
-	varPtr = TclObjLookupVar(interp, objv[objc-1], NULL,
-		TCL_NAMESPACE_ONLY|TCL_LEAVE_ERR_MSG, "refer to",1,1,&aryVar);
-	iPtr->varFramePtr->nsPtr = savedNsPtr;
-    }
 
+	varNamePtr = Tcl_NewStringObj(namespacePtr->fullName, -1);
+	Tcl_AppendToObj(varNamePtr, "::", 2);
+	Tcl_AppendObjToObj(varNamePtr, argPtr);
+    }
+    Tcl_IncrRefCount(varNamePtr);
+    varPtr = TclObjLookupVar(interp, varNamePtr, NULL,
+	    TCL_NAMESPACE_ONLY|TCL_LEAVE_ERR_MSG, "refer to", 1, 1, &aryVar);
+    Tcl_DecrRefCount(varNamePtr);
     if (varPtr == NULL) {
-	Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "VARIABLE",
-		TclGetString(objv[objc-1]), NULL);
+	Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "VARIABLE", arg, NULL);
 	return TCL_ERROR;
     }
 
+    /*
+     * Now that we've pinned down what variable we're really talking about
+     * (including traversing variable links), convert back to a name.
+     */
+
     varNamePtr = Tcl_NewObj();
     if (aryVar != NULL) {
 	Tcl_HashEntry *hPtr;
diff --git a/generic/tclOOCall.c b/generic/tclOOCall.c
index fd751ff..c595669 100644
--- a/generic/tclOOCall.c
+++ b/generic/tclOOCall.c
@@ -178,7 +178,7 @@ StashCallChain(
     callPtr->refCount++;
     TclFreeIntRep(objPtr);
     objPtr->typePtr = &methodNameType;
-    objPtr->internalRep.otherValuePtr = callPtr;
+    objPtr->internalRep.twoPtrValue.ptr1 = callPtr;
 }
 
 void
@@ -205,10 +205,10 @@ DupMethodNameRep(
     Tcl_Obj *srcPtr,
     Tcl_Obj *dstPtr)
 {
-    register CallChain *callPtr = srcPtr->internalRep.otherValuePtr;
+    register CallChain *callPtr = srcPtr->internalRep.twoPtrValue.ptr1;
 
     dstPtr->typePtr = &methodNameType;
-    dstPtr->internalRep.otherValuePtr = callPtr;
+    dstPtr->internalRep.twoPtrValue.ptr1 = callPtr;
     callPtr->refCount++;
 }
 
@@ -216,10 +216,9 @@ static void
 FreeMethodNameRep(
     Tcl_Obj *objPtr)
 {
-    register CallChain *callPtr = objPtr->internalRep.otherValuePtr;
+    register CallChain *callPtr = objPtr->internalRep.twoPtrValue.ptr1;
 
     TclOODeleteChain(callPtr);
-    objPtr->internalRep.otherValuePtr = NULL;
     objPtr->typePtr = NULL;
 }
 
@@ -952,7 +951,7 @@ TclOOGetCallContext(
 	const int reuseMask = ((flags & PUBLIC_METHOD) ? ~0 : ~PUBLIC_METHOD);
 
 	if (cacheInThisObj->typePtr == &methodNameType) {
-	    callPtr = cacheInThisObj->internalRep.otherValuePtr;
+	    callPtr = cacheInThisObj->internalRep.twoPtrValue.ptr1;
 	    if (IsStillValid(callPtr, oPtr, flags, reuseMask)) {
 		callPtr->refCount++;
 		goto returnContext;
diff --git a/generic/tclOOMethod.c b/generic/tclOOMethod.c
index e60f737..44e0128 100644
--- a/generic/tclOOMethod.c
+++ b/generic/tclOOMethod.c
@@ -860,7 +860,7 @@ PushMethodCallFrame(
 
     if (pmPtr->procPtr->bodyPtr->typePtr == &tclByteCodeType) {
 	ByteCode *codePtr =
-		pmPtr->procPtr->bodyPtr->internalRep.otherValuePtr;
+		pmPtr->procPtr->bodyPtr->internalRep.twoPtrValue.ptr1;
 
 	codePtr->nsPtr = nsPtr;
     }
diff --git a/generic/tclObj.c b/generic/tclObj.c
index 5bf20b0..79f7bb5 100644
--- a/generic/tclObj.c
+++ b/generic/tclObj.c
@@ -196,7 +196,6 @@ static Tcl_ThreadDataKey pendingObjDataKey;
  */
 
 static int		ParseBoolean(Tcl_Obj *objPtr);
-static int		SetBooleanFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
 static int		SetDoubleFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
 static int		SetIntFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
 static void		UpdateStringOfDouble(Tcl_Obj *objPtr);
@@ -238,14 +237,14 @@ static const Tcl_ObjType oldBooleanType = {
     NULL,			/* freeIntRepProc */
     NULL,			/* dupIntRepProc */
     NULL,			/* updateStringProc */
-    SetBooleanFromAny		/* setFromAnyProc */
+    TclSetBooleanFromAny		/* setFromAnyProc */
 };
 const Tcl_ObjType tclBooleanType = {
     "booleanString",		/* name */
     NULL,			/* freeIntRepProc */
     NULL,			/* dupIntRepProc */
     NULL,			/* updateStringProc */
-    SetBooleanFromAny		/* setFromAnyProc */
+    TclSetBooleanFromAny		/* setFromAnyProc */
 };
 const Tcl_ObjType tclDoubleType = {
     "double",			/* name */
@@ -1810,7 +1809,7 @@ Tcl_GetBooleanFromObj(
 /*
  *----------------------------------------------------------------------
  *
- * SetBooleanFromAny --
+ * TclSetBooleanFromAny --
  *
  *	Attempt to generate a boolean internal form for the Tcl object
  *	"objPtr".
@@ -1827,8 +1826,8 @@ Tcl_GetBooleanFromObj(
  *----------------------------------------------------------------------
  */
 
-static int
-SetBooleanFromAny(
+int
+TclSetBooleanFromAny(
     Tcl_Interp *interp,		/* Used for error reporting if not NULL. */
     register Tcl_Obj *objPtr)	/* The object to convert. */
 {
@@ -4070,7 +4069,7 @@ Tcl_GetCommandFromObj(
      * had is invalid one way or another.
      */
 
-    if (tclCmdNameType.setFromAnyProc(interp, objPtr) != TCL_OK) {
+    if (SetCmdNameFromAny(interp, objPtr) != TCL_OK) {
         return NULL;
     }
     resPtr = objPtr->internalRep.twoPtrValue.ptr1;
@@ -4289,7 +4288,7 @@ SetCmdNameFromAny(
 
     if (cmdPtr) {
 	cmdPtr->refCount++;
-	resPtr = objPtr->internalRep.otherValuePtr;
+	resPtr = objPtr->internalRep.twoPtrValue.ptr1;
 	if ((objPtr->typePtr == &tclCmdNameType)
 		&& resPtr && (resPtr->refCount == 1)) {
 	    /*
diff --git a/generic/tclPathObj.c b/generic/tclPathObj.c
index 2b9ff87..b7f3dcf 100644
--- a/generic/tclPathObj.c
+++ b/generic/tclPathObj.c
@@ -109,9 +109,9 @@ typedef struct FsPath {
  * fields.
  */
 
-#define PATHOBJ(pathPtr) ((FsPath *) (pathPtr)->internalRep.otherValuePtr)
+#define PATHOBJ(pathPtr) ((FsPath *) (pathPtr)->internalRep.twoPtrValue.ptr1)
 #define SETPATHOBJ(pathPtr,fsPathPtr) \
-	((pathPtr)->internalRep.otherValuePtr = (void *) (fsPathPtr))
+	((pathPtr)->internalRep.twoPtrValue.ptr1 = (void *) (fsPathPtr))
 #define PATHFLAGS(pathPtr) (PATHOBJ(pathPtr)->flags)
 
 /*
@@ -1156,7 +1156,7 @@ Tcl_FSConvertToPathType(
 	FreeFsPathInternalRep(pathPtr);
     }
 
-    return Tcl_ConvertToType(interp, pathPtr, &tclFsPathType);
+    return SetFsPathFromAny(interp, pathPtr);
 
     /*
      * We used to have more complex code here:
@@ -1873,7 +1873,7 @@ Tcl_FSGetNormalizedPath(
 		UpdateStringOfFsPath(pathPtr);
 	    }
 	    FreeFsPathInternalRep(pathPtr);
-	    if (Tcl_ConvertToType(interp, pathPtr, &tclFsPathType) != TCL_OK) {
+	    if (SetFsPathFromAny(interp, pathPtr) != TCL_OK) {
 		return NULL;
 	    }
 	    fsPathPtr = PATHOBJ(pathPtr);
diff --git a/generic/tclPort.h b/generic/tclPort.h
index 7021b8d..12a60db 100644
--- a/generic/tclPort.h
+++ b/generic/tclPort.h
@@ -19,11 +19,10 @@
 #endif
 #if defined(_WIN32)
 #   include "tclWinPort.h"
-#endif
-#include "tcl.h"
-#if !defined(_WIN32)
+#else
 #   include "tclUnixPort.h"
 #endif
+#include "tcl.h"
 
 #if !defined(LLONG_MIN)
 #   ifdef TCL_WIDE_INT_IS_LONG
diff --git a/generic/tclProc.c b/generic/tclProc.c
index d841dcb..edb9b50 100644
--- a/generic/tclProc.c
+++ b/generic/tclProc.c
@@ -421,7 +421,7 @@ TclCreateProc(
 	 * will be holding a reference to it.
 	 */
 
-	procPtr = bodyPtr->internalRep.otherValuePtr;
+	procPtr = bodyPtr->internalRep.twoPtrValue.ptr1;
 	procPtr->iPtr = iPtr;
 	procPtr->refCount++;
 	precompiled = 1;
@@ -1196,7 +1196,7 @@ TclInitCompiledLocals(
     if (bodyPtr->typePtr != &tclByteCodeType) {
 	Tcl_Panic("body object for proc attached to frame is not a byte code type");
     }
-    codePtr = bodyPtr->internalRep.otherValuePtr;
+    codePtr = bodyPtr->internalRep.twoPtrValue.ptr1;
 
     if (framePtr->numCompiledLocals) {
 	if (!codePtr->localCachePtr) {
@@ -1367,7 +1367,7 @@ InitLocalCache(
     Proc *procPtr)
 {
     Interp *iPtr = procPtr->iPtr;
-    ByteCode *codePtr = procPtr->bodyPtr->internalRep.otherValuePtr;
+    ByteCode *codePtr = procPtr->bodyPtr->internalRep.twoPtrValue.ptr1;
     int localCt = procPtr->numCompiledLocals;
     int numArgs = procPtr->numArgs, i = 0;
 
@@ -1444,7 +1444,7 @@ InitArgsAndLocals(
 {
     CallFrame *framePtr = ((Interp *)interp)->varFramePtr;
     register Proc *procPtr = framePtr->procPtr;
-    ByteCode *codePtr = procPtr->bodyPtr->internalRep.otherValuePtr;
+    ByteCode *codePtr = procPtr->bodyPtr->internalRep.twoPtrValue.ptr1;
     register Var *varPtr, *defPtr;
     int localCt = procPtr->numCompiledLocals, numArgs, argCt, i, imax;
     Tcl_Obj *const *argObjs;
@@ -1631,7 +1631,7 @@ PushProcCallFrame(
 	 * commands and/or resolver changes are considered).
 	 */
 
-	codePtr = procPtr->bodyPtr->internalRep.otherValuePtr;
+	codePtr = procPtr->bodyPtr->internalRep.twoPtrValue.ptr1;
 	if (((Interp *) *codePtr->interpHandle != iPtr)
 		|| (codePtr->compileEpoch != iPtr->compileEpoch)
 		|| (codePtr->nsPtr != nsPtr)
@@ -1832,7 +1832,7 @@ TclNRInterpProcCore(
      */
 
     procPtr->refCount++;
-    codePtr = procPtr->bodyPtr->internalRep.otherValuePtr;
+    codePtr = procPtr->bodyPtr->internalRep.twoPtrValue.ptr1;
 
     TclNRAddCallback(interp, InterpProcNR2, procNameObj, errorProc,
 	    NULL, NULL);
@@ -1974,7 +1974,7 @@ TclProcCompileProc(
 {
     Interp *iPtr = (Interp *) interp;
     Tcl_CallFrame *framePtr;
-    ByteCode *codePtr = bodyPtr->internalRep.otherValuePtr;
+    ByteCode *codePtr = bodyPtr->internalRep.twoPtrValue.ptr1;
 
     /*
      * If necessary, compile the procedure's body. The compiler will allocate
@@ -2094,7 +2094,7 @@ TclProcCompileProc(
 
 	iPtr->invokeWord = 0;
 	iPtr->invokeCmdFramePtr = (hePtr ? Tcl_GetHashValue(hePtr) : NULL);
-	tclByteCodeType.setFromAnyProc(interp, bodyPtr);
+	TclSetByteCodeFromAny(interp, bodyPtr, NULL, NULL);
 	iPtr->invokeCmdFramePtr = NULL;
 	TclPopStackFrame(interp);
     } else if (codePtr->nsEpoch != nsPtr->resolverEpoch) {
@@ -2364,7 +2364,7 @@ TclNewProcBodyObj(
     TclNewObj(objPtr);
     if (objPtr) {
 	objPtr->typePtr = &tclProcBodyType;
-	objPtr->internalRep.otherValuePtr = procPtr;
+	objPtr->internalRep.twoPtrValue.ptr1 = procPtr;
 
 	procPtr->refCount++;
     }
@@ -2394,10 +2394,10 @@ ProcBodyDup(
     Tcl_Obj *srcPtr,		/* Object to copy. */
     Tcl_Obj *dupPtr)		/* Target object for the duplication. */
 {
-    Proc *procPtr = srcPtr->internalRep.otherValuePtr;
+    Proc *procPtr = srcPtr->internalRep.twoPtrValue.ptr1;
 
     dupPtr->typePtr = &tclProcBodyType;
-    dupPtr->internalRep.otherValuePtr = procPtr;
+    dupPtr->internalRep.twoPtrValue.ptr1 = procPtr;
     procPtr->refCount++;
 }
 
@@ -2424,10 +2424,9 @@ static void
 ProcBodyFree(
     Tcl_Obj *objPtr)		/* The object to clean up. */
 {
-    Proc *procPtr = objPtr->internalRep.otherValuePtr;
+    Proc *procPtr = objPtr->internalRep.twoPtrValue.ptr1;
 
-    procPtr->refCount--;
-    if (procPtr->refCount <= 0) {
+    if (procPtr->refCount-- < 2) {
 	TclProcCleanupProc(procPtr);
     }
 }
@@ -2720,7 +2719,6 @@ TclNRApplyObjCmd(
     else {
 	/*
 	 * Joe English's suggestion to allow cmdNames to function as lambdas.
-	 * Also requires making tclCmdNameType non-static in tclObj.c
 	 */
 
 	Tcl_Obj *elemPtr;
@@ -2960,10 +2958,9 @@ Tcl_DisassembleObjCmd(
 	    Tcl_WrongNumArgs(interp, 2, objv, "script");
 	    return TCL_ERROR;
 	}
-	if (objv[2]->typePtr != &tclByteCodeType) {
-	    if (TclSetByteCodeFromAny(interp, objv[2], NULL, NULL) != TCL_OK){
-		return TCL_ERROR;
-	    }
+	if ((objv[2]->typePtr != &tclByteCodeType)
+		&& (TclSetByteCodeFromAny(interp, objv[2], NULL, NULL) != TCL_OK)) {
+	    return TCL_ERROR;
 	}
 	codeObjPtr = objv[2];
 	break;
@@ -3060,7 +3057,7 @@ Tcl_DisassembleObjCmd(
      * Do the actual disassembly.
      */
 
-    if (((ByteCode *) codeObjPtr->internalRep.otherValuePtr)->flags
+    if (((ByteCode *) codeObjPtr->internalRep.twoPtrValue.ptr1)->flags
 	    & TCL_BYTECODE_PRECOMPILED) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		"may not disassemble prebuilt bytecode", -1));
diff --git a/generic/tclRegexp.c b/generic/tclRegexp.c
index 6c1dc08..6348e4a 100644
--- a/generic/tclRegexp.c
+++ b/generic/tclRegexp.c
@@ -578,7 +578,7 @@ Tcl_GetRegExpFromObj(
      * TclRegexp* when the type is tclRegexpType.
      */
 
-    regexpPtr = objPtr->internalRep.otherValuePtr;
+    regexpPtr = objPtr->internalRep.twoPtrValue.ptr1;
 
     if ((objPtr->typePtr != &tclRegexpType) || (regexpPtr->flags != flags)) {
 	pattern = TclGetStringFromObj(objPtr, &length);
@@ -601,7 +601,7 @@ Tcl_GetRegExpFromObj(
 	 */
 
 	TclFreeIntRep(objPtr);
-	objPtr->internalRep.otherValuePtr = regexpPtr;
+	objPtr->internalRep.twoPtrValue.ptr1 = regexpPtr;
 	objPtr->typePtr = &tclRegexpType;
     }
     return (Tcl_RegExp) regexpPtr;
@@ -749,7 +749,7 @@ static void
 FreeRegexpInternalRep(
     Tcl_Obj *objPtr)		/* Regexp object with internal rep to free. */
 {
-    TclRegexp *regexpRepPtr = objPtr->internalRep.otherValuePtr;
+    TclRegexp *regexpRepPtr = objPtr->internalRep.twoPtrValue.ptr1;
 
     /*
      * If this is the last reference to the regexp, free it.
@@ -783,10 +783,10 @@ DupRegexpInternalRep(
     Tcl_Obj *srcPtr,		/* Object with internal rep to copy. */
     Tcl_Obj *copyPtr)		/* Object with internal rep to set. */
 {
-    TclRegexp *regexpPtr = srcPtr->internalRep.otherValuePtr;
+    TclRegexp *regexpPtr = srcPtr->internalRep.twoPtrValue.ptr1;
 
     regexpPtr->refCount++;
-    copyPtr->internalRep.otherValuePtr = srcPtr->internalRep.otherValuePtr;
+    copyPtr->internalRep.twoPtrValue.ptr1 = srcPtr->internalRep.twoPtrValue.ptr1;
     copyPtr->typePtr = &tclRegexpType;
 }
 
diff --git a/generic/tclResult.c b/generic/tclResult.c
index 9707f20..07f6819 100644
--- a/generic/tclResult.c
+++ b/generic/tclResult.c
@@ -1587,7 +1587,7 @@ Tcl_GetReturnOptions(
     }
 
     if (result == TCL_ERROR) {
-	Tcl_AddObjErrorInfo(interp, "", -1);
+	Tcl_AddErrorInfo(interp, "");
         Tcl_DictObjPut(NULL, options, keys[KEY_ERRORSTACK], iPtr->errorStack);
     }
     if (iPtr->errorCode) {
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index 04cf4ee..e495c2e 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -140,9 +140,9 @@ typedef struct String {
 #define stringAttemptRealloc(ptr, numChars) \
     (String *) attemptckrealloc((ptr), (unsigned) STRING_SIZE(numChars) )
 #define GET_STRING(objPtr) \
-	((String *) (objPtr)->internalRep.otherValuePtr)
+	((String *) (objPtr)->internalRep.twoPtrValue.ptr1)
 #define SET_STRING(objPtr, stringPtr) \
-	((objPtr)->internalRep.otherValuePtr = (void *) (stringPtr))
+	((objPtr)->internalRep.twoPtrValue.ptr1 = (void *) (stringPtr))
 
 /*
  * TCL STRING GROWTH ALGORITHM
diff --git a/generic/tclStubInit.c b/generic/tclStubInit.c
index fc3f5fb..ce34c2f 100644
--- a/generic/tclStubInit.c
+++ b/generic/tclStubInit.c
@@ -54,6 +54,31 @@ static int TclSockMinimumBuffersOld(int sock, int size)
 }
 #endif
 
+#define TclSetStartupScriptPath setStartupScriptPath
+static void TclSetStartupScriptPath(Tcl_Obj *path)
+{
+    Tcl_SetStartupScript(path, NULL);
+}
+#define TclGetStartupScriptPath getStartupScriptPath
+static Tcl_Obj *TclGetStartupScriptPath(void)
+{
+    return Tcl_GetStartupScript(NULL);
+}
+#define TclSetStartupScriptFileName setStartupScriptFileName
+static void TclSetStartupScriptFileName(
+    const char *fileName)
+{
+    Tcl_SetStartupScript(Tcl_NewStringObj(fileName,-1), NULL);
+}
+#define TclGetStartupScriptFileName getStartupScriptFileName
+static const char *TclGetStartupScriptFileName(void)
+{
+    Tcl_Obj *path = Tcl_GetStartupScript(NULL);
+    if (path == NULL) {
+	return NULL;
+    }
+    return Tcl_GetStringFromObj(path, NULL);
+}
 
 #if defined(_WIN32) || defined(__CYGWIN__)
 #undef TclWinNToHS
@@ -348,8 +373,8 @@ static const TclIntStubs tclIntStubs = {
     0, /* 155 */
     TclRegError, /* 156 */
     TclVarTraceExists, /* 157 */
-    0, /* 158 */
-    0, /* 159 */
+    TclSetStartupScriptFileName, /* 158 */
+    TclGetStartupScriptFileName, /* 159 */
     0, /* 160 */
     TclChannelTransform, /* 161 */
     TclChannelEventScriptInvoker, /* 162 */
@@ -357,8 +382,8 @@ static const TclIntStubs tclIntStubs = {
     TclExpandCodeArray, /* 164 */
     TclpSetInitialEncodings, /* 165 */
     TclListObjSetElement, /* 166 */
-    0, /* 167 */
-    0, /* 168 */
+    TclSetStartupScriptPath, /* 167 */
+    TclGetStartupScriptPath, /* 168 */
     TclpUtfNcmp2, /* 169 */
     TclCheckInterpTraces, /* 170 */
     TclCheckExecutionTraces, /* 171 */
@@ -368,8 +393,8 @@ static const TclIntStubs tclIntStubs = {
     TclCallVarTraces, /* 175 */
     TclCleanupVar, /* 176 */
     TclVarErrMsg, /* 177 */
-    0, /* 178 */
-    0, /* 179 */
+    Tcl_SetStartupScript, /* 178 */
+    Tcl_GetStartupScript, /* 179 */
     0, /* 180 */
     0, /* 181 */
     TclpLocaltime, /* 182 */
diff --git a/generic/tclTestObj.c b/generic/tclTestObj.c
index 4bddc42..f36b07f 100644
--- a/generic/tclTestObj.c
+++ b/generic/tclTestObj.c
@@ -555,7 +555,7 @@ TestindexobjCmd(
 	}
 
 	Tcl_GetIndexFromObj(NULL, objv[1], tablePtr, "token", 0, &index);
-	indexRep = objv[1]->internalRep.otherValuePtr;
+	indexRep = objv[1]->internalRep.twoPtrValue.ptr1;
 	indexRep->index = index2;
 	result = Tcl_GetIndexFromObj(NULL, objv[1],
 		tablePtr, "token", 0, &index);
@@ -592,7 +592,7 @@ TestindexobjCmd(
 
     if (objv[3]->typePtr != NULL
 	    && !strcmp("index", objv[3]->typePtr->name)) {
-	indexRep = objv[3]->internalRep.otherValuePtr;
+	indexRep = objv[3]->internalRep.twoPtrValue.ptr1;
 	if (indexRep->tablePtr == (void *) argv) {
 	    TclFreeIntRep(objv[3]);
 	}
@@ -1250,7 +1250,7 @@ TeststringobjCmd(
 	    if (varPtr[varIndex] != NULL) {
 		Tcl_ConvertToType(NULL, varPtr[varIndex],
 			Tcl_GetObjType("string"));
-		strPtr = varPtr[varIndex]->internalRep.otherValuePtr;
+		strPtr = varPtr[varIndex]->internalRep.twoPtrValue.ptr1;
 		length = (int) strPtr->allocated;
 	    } else {
 		length = -1;
@@ -1304,7 +1304,7 @@ TeststringobjCmd(
 	    if (varPtr[varIndex] != NULL) {
 		Tcl_ConvertToType(NULL, varPtr[varIndex],
 			Tcl_GetObjType("string"));
-		strPtr = varPtr[varIndex]->internalRep.otherValuePtr;
+		strPtr = varPtr[varIndex]->internalRep.twoPtrValue.ptr1;
 		length = strPtr->maxChars;
 	    } else {
 		length = -1;
diff --git a/generic/tclThreadTest.c b/generic/tclThreadTest.c
index b90e33d..8708f9a 100644
--- a/generic/tclThreadTest.c
+++ b/generic/tclThreadTest.c
@@ -926,10 +926,11 @@ ThreadSend(
 	    ckfree(resultPtr->errorInfo);
 	}
     }
-    Tcl_SetResult(interp, resultPtr->result, TCL_DYNAMIC);
+    Tcl_AppendResult(interp, resultPtr->result, NULL);
     Tcl_ConditionFinalize(&resultPtr->done);
     code = resultPtr->code;
 
+    ckfree(resultPtr->result);
     ckfree(resultPtr);
 
     return code;
diff --git a/generic/tclTrace.c b/generic/tclTrace.c
index 61bac9b..a8bb92d 100644
--- a/generic/tclTrace.c
+++ b/generic/tclTrace.c
@@ -1322,7 +1322,7 @@ TraceCommandProc(
 		Tcl_DStringLength(&cmd), 0);
 	if (code != TCL_OK) {
 	    /* We ignore errors in these traced commands */
-	    /*** QUESTION: Use Tcl_BackgroundError(interp); instead? ***/
+	    /*** QUESTION: Use Tcl_BackgroundException(interp, code); instead? ***/
 	}
 	Tcl_DStringFree(&cmd);
     }
diff --git a/generic/tclVar.c b/generic/tclVar.c
index 9b8527c..befcc26 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -475,6 +475,9 @@ TclObjLookupVar(
 
     if (part2) {
 	part2Ptr = Tcl_NewStringObj(part2, -1);
+	if (createPart2) {
+	    Tcl_IncrRefCount(part2Ptr);
+	}
     }
 
     resPtr = TclObjLookupVarEx(interp, part1Ptr, part2Ptr,
@@ -487,6 +490,12 @@ TclObjLookupVar(
     return resPtr;
 }
 
+/*
+ *	When createPart1 is 1, callers must IncrRefCount part1Ptr if they
+ *	plan to DecrRefCount it.
+ *	When createPart2 is 1, callers must IncrRefCount part2Ptr if they
+ *	plan to DecrRefCount it.
+ */
 Var *
 TclObjLookupVarEx(
     Tcl_Interp *interp,		/* Interpreter to use for lookup. */
@@ -627,7 +636,9 @@ TclObjLookupVarEx(
 	    part2 = newPart2 = part1Ptr->internalRep.twoPtrValue.ptr2;
 	    if (newPart2) {
 		part2Ptr = Tcl_NewStringObj(newPart2, -1);
-		Tcl_IncrRefCount(part2Ptr);
+		if (createPart2) {
+		    Tcl_IncrRefCount(part2Ptr);
+		}
 	    }
 	    part1Ptr = part1Ptr->internalRep.twoPtrValue.ptr1;
 	    typePtr = part1Ptr->typePtr;
@@ -673,7 +684,9 @@ TclObjLookupVarEx(
 		*(newPart2+len2) = '\0';
 		part2 = newPart2;
 		part2Ptr = Tcl_NewStringObj(newPart2, -1);
-		Tcl_IncrRefCount(part2Ptr);
+		if (createPart2) {
+		    Tcl_IncrRefCount(part2Ptr);
+		}
 
 		/*
 		 * Free the internal rep of the original part1Ptr, now renamed
@@ -1083,6 +1096,8 @@ TclLookupSimpleVar(
  *	The variable at arrayPtr may be converted to be an array if
  *	createPart1 is 1. A new hashtable entry may be created if createPart2
  *	is 1.
+ *	When createElem is 1, callers must incr elNamePtr if they plan
+ *	to decr it.
  *
  *----------------------------------------------------------------------
  */
@@ -1217,11 +1232,9 @@ Tcl_GetVar(
 				 * TCL_NAMESPACE_ONLY or TCL_LEAVE_ERR_MSG
 				 * bits. */
 {
-    Tcl_Obj *varNamePtr, *resultPtr;
+    Tcl_Obj *varNamePtr = Tcl_NewStringObj(varName, -1);
+    Tcl_Obj *resultPtr = Tcl_ObjGetVar2(interp, varNamePtr, NULL, flags);
 
-    varNamePtr = Tcl_NewStringObj(varName, -1);
-    Tcl_IncrRefCount(varNamePtr);
-    resultPtr = Tcl_ObjGetVar2(interp, varNamePtr, NULL, flags);
     TclDecrRefCount(varNamePtr);
 
     if (resultPtr == NULL) {
@@ -1265,15 +1278,12 @@ Tcl_GetVar2(
 				 * TCL_NAMESPACE_ONLY and TCL_LEAVE_ERR_MSG *
 				 * bits. */
 {
-    Tcl_Obj *resultPtr, *part1Ptr, *part2Ptr;
+    Tcl_Obj *resultPtr;
+    Tcl_Obj *part2Ptr = NULL, *part1Ptr = Tcl_NewStringObj(part1, -1);
 
-    part1Ptr = Tcl_NewStringObj(part1, -1);
-    Tcl_IncrRefCount(part1Ptr);
     if (part2) {
 	part2Ptr = Tcl_NewStringObj(part2, -1);
 	Tcl_IncrRefCount(part2Ptr);
-    } else {
-	part2Ptr = NULL;
     }
 
     resultPtr = Tcl_ObjGetVar2(interp, part1Ptr, part2Ptr, flags);
@@ -1326,6 +1336,7 @@ Tcl_GetVar2Ex(
 
     if (part2) {
 	part2Ptr = Tcl_NewStringObj(part2, -1);
+	Tcl_IncrRefCount(part2Ptr);
     }
 
     resPtr = Tcl_ObjGetVar2(interp, part1Ptr, part2Ptr, flags);
@@ -1358,6 +1369,8 @@ Tcl_GetVar2Ex(
  *	the returned reference; if you want to keep a reference to the object
  *	you must increment its ref count yourself.
  *
+ *	Callers must incr part2Ptr if they plan to decr it.
+ *
  *----------------------------------------------------------------------
  */
 
@@ -1563,17 +1576,13 @@ Tcl_SetVar(
 				 * TCL_APPEND_VALUE, TCL_LIST_ELEMENT,
 				 * TCL_LEAVE_ERR_MSG. */
 {
-    Tcl_Obj *valuePtr, *varNamePtr, *varValuePtr;
+    Tcl_Obj *varValuePtr, *varNamePtr = Tcl_NewStringObj(varName, -1);
 
-    varNamePtr = Tcl_NewStringObj(varName, -1);
     Tcl_IncrRefCount(varNamePtr);
-    valuePtr = Tcl_NewStringObj(newValue, -1);
-    Tcl_IncrRefCount(valuePtr);
-
-    varValuePtr = Tcl_ObjSetVar2(interp, varNamePtr, NULL, valuePtr, flags);
-
+    varValuePtr = Tcl_ObjSetVar2(interp, varNamePtr, NULL, 
+	    Tcl_NewStringObj(newValue, -1), flags);
     Tcl_DecrRefCount(varNamePtr);
-    Tcl_DecrRefCount(valuePtr);
+
     if (varValuePtr == NULL) {
 	return NULL;
     }
@@ -1721,6 +1730,7 @@ Tcl_SetVar2Ex(
  *	The value of the given variable is set. If either the array or the
  *	entry didn't exist then a new variable is created.
  *	Callers must Incr part1Ptr if they plan to Decr it.
+ *	Callers must Incr part2Ptr if they plan to Decr it.
  *
  *----------------------------------------------------------------------
  */
@@ -2011,6 +2021,7 @@ TclPtrSetVar(
  *	incremented to reflect the returned reference; if you want to keep a
  *	reference to the object you must increment its ref count yourself.
  *	Callers must Incr part1Ptr if they plan to Decr it.
+ *	Callers must Incr part2Ptr if they plan to Decr it.
  *
  *----------------------------------------------------------------------
  */
@@ -2036,8 +2047,8 @@ TclIncrObjVar2(
     varPtr = TclObjLookupVarEx(interp, part1Ptr, part2Ptr, flags, "read",
 	    1, 1, &arrayPtr);
     if (varPtr == NULL) {
-	Tcl_AddObjErrorInfo(interp,
-		"\n    (reading value of variable to increment)", -1);
+	Tcl_AddErrorInfo(interp,
+		"\n    (reading value of variable to increment)");
 	return NULL;
     }
     return TclPtrIncrObjVar(interp, varPtr, arrayPtr, part1Ptr, part2Ptr,
@@ -5108,7 +5119,8 @@ ParseSearchId(
      * Parse the id.
      */
 
-    if (Tcl_ConvertToType(interp, handleObj, &tclArraySearchType) != TCL_OK) {
+    if ((handleObj->typePtr != &tclArraySearchType)
+	    && (SetArraySearchObj(interp, handleObj) != TCL_OK)) {
 	return NULL;
     }
 
diff --git a/generic/tclZlib.c b/generic/tclZlib.c
index 9c1176e..ff887c8 100644
--- a/generic/tclZlib.c
+++ b/generic/tclZlib.c
@@ -3111,7 +3111,7 @@ ZlibTransformOutput(
 	e = deflate(&cd->outStream, Z_NO_FLUSH);
 	produced = cd->outAllocated - cd->outStream.avail_out;
 
-	if (e == Z_OK && cd->outStream.avail_out > 0) {
+	if (e == Z_OK && produced > 0) {
 	    if (Tcl_WriteRaw(cd->parent, cd->outBuffer, produced) < 0) {
 		*errorCodePtr = Tcl_GetErrno();
 		return -1;
@@ -3865,7 +3865,7 @@ TclZlibInit(
     cfg[0].key = "zlibVersion";
     cfg[0].value = zlibVersion();
     cfg[1].key = NULL;
-    Tcl_RegisterConfig(interp, "zlib", cfg, "ascii");
+    Tcl_RegisterConfig(interp, "zlib", cfg, "iso8859-1");
 
     /*
      * Formally provide the package as a Tcl built-in.
diff --git a/library/auto.tcl b/library/auto.tcl
index 4bd860d..e86257e 100644
--- a/library/auto.tcl
+++ b/library/auto.tcl
@@ -20,8 +20,9 @@
 # None.
 
 proc auto_reset {} {
-    if {[array exists ::auto_index]} {
-	foreach cmdName [array names ::auto_index] {
+    global auto_execs auto_index auto_path
+    if {[array exists auto_index]} {
+	foreach cmdName [array names auto_index] {
 	    set fqcn [namespace which $cmdName]
 	    if {$fqcn eq ""} {
 		continue
@@ -29,11 +30,11 @@ proc auto_reset {} {
 	    rename $fqcn {}
 	}
     }
-    unset -nocomplain ::auto_execs ::auto_index ::tcl::auto_oldpath
-    if {[catch {llength $::auto_path}]} {
-	set ::auto_path [list [info library]]
-    } elseif {[info library] ni $::auto_path} {
-	lappend ::auto_path [info library]
+    unset -nocomplain auto_execs auto_index ::tcl::auto_oldpath
+    if {[catch {llength $auto_path}]} {
+	set auto_path [list [info library]]
+    } elseif {[info library] ni $auto_path} {
+	lappend auto_path [info library]
     }
 }
 
@@ -53,7 +54,7 @@ proc auto_reset {} {
 
 proc tcl_findLibrary {basename version patch initScript enVarName varName} {
     upvar #0 $varName the_library
-    global env
+    global auto_path env tcl_platform
 
     set dirs {}
     set errors {}
@@ -83,12 +84,10 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} {
 	# 3. Relative to auto_path directories.  This checks relative to the
 	# Tcl library as well as allowing loading of libraries added to the
 	# auto_path that is not relative to the core library or binary paths.
-	foreach d $::auto_path {
+	foreach d $auto_path {
 	    lappend dirs [file join $d $basename$version]
-	    if {
-		$::tcl_platform(platform) eq "unix"
-		&& $::tcl_platform(os) eq "Darwin"
-	    } then {
+	    if {$tcl_platform(platform) eq "unix"
+		    && $tcl_platform(os) eq "Darwin"} {
 		# 4. On MacOSX, check the Resources/Scripts subdir too
 		lappend dirs [file join $d $basename$version Resources Scripts]
 	    }
diff --git a/library/http/http.tcl b/library/http/http.tcl
index 01bf772..ddf066e 100644
--- a/library/http/http.tcl
+++ b/library/http/http.tcl
@@ -537,11 +537,10 @@ proc http::geturl {url args} {
     # If a timeout is specified we set up the after event and arrange for an
     # asynchronous socket connection.
 
-    set sockopts [list]
+    set sockopts [list -async]
     if {$state(-timeout) > 0} {
 	set state(after) [after $state(-timeout) \
 		[list http::reset $token timeout]]
-	lappend sockopts -async
     }
 
     # If we are using the proxy, we must pass in the full URL that includes
@@ -597,10 +596,15 @@ proc http::geturl {url args} {
         set socketmap($state(socketinfo)) $sock
     }
 
-    # Wait for the connection to complete.
+    if {![info exists phost]} {
+	set phost ""
+    }
+    fileevent $sock writable [list http::Connect $token $proto $phost $srvurl]
 
-    if {$state(-timeout) > 0} {
-	fileevent $sock writable [list http::Connect $token]
+    # Wait for the connection to complete.
+    if {![info exists state(-command)]} {
+	# geturl does EVERYTHING asynchronously, so if the user
+	# calls it synchronously, we just do a wait here.
 	http::wait $token
 
 	if {![info exists state]} {
@@ -616,13 +620,29 @@ proc http::geturl {url args} {
 	    set err [lindex $state(error) 0]
 	    cleanup $token
 	    return -code error $err
-	} elseif {$state(status) ne "connect"} {
-	    # Likely to be connection timeout
-	    return $token
 	}
-	set state(status) ""
     }
 
+    return $token
+}
+
+
+proc http::Connected { token proto phost srvurl} {
+    variable http
+    variable urlTypes
+
+    variable $token
+    upvar 0 $token state
+
+    # Set back the variables needed here
+    set sock $state(sock)
+    set isQueryChannel [info exists state(-querychannel)]
+    set isQuery [info exists state(-query)]
+    set host [lindex [split $state(socketinfo) :] 0]
+    set port [lindex [split $state(socketinfo) :] 1]
+
+    set defport [lindex $urlTypes($proto) 0]
+
     # Send data in cr-lf format, but accept any line terminators
 
     fconfigure $sock -translation {auto crlf} -buffersize $state(-blocksize)
@@ -753,35 +773,17 @@ proc http::geturl {url args} {
 	    fileevent $sock readable [list http::Event $sock $token]
 	}
 
-	if {![info exists state(-command)]} {
-	    # geturl does EVERYTHING asynchronously, so if the user calls it
-	    # synchronously, we just do a wait here.
-
-	    wait $token
-	    if {$state(status) eq "error"} {
-		# Something went wrong, so throw the exception, and the
-		# enclosing catch will do cleanup.
-		return -code error [lindex $state(error) 0]
-	    }
-	}
     } err]} {
 	# The socket probably was never connected, or the connection dropped
 	# later.
 
-	# Clean up after events and such, but DON'T call the command callback
-	# (if available) because we're going to throw an exception from here
-	# instead.
-
 	# if state(status) is error, it means someone's already called Finish
 	# to do the above-described clean up.
 	if {$state(status) ne "error"} {
-	    Finish $token $err 1
+	    Finish $token $err
 	}
-	cleanup $token
-	return -code error $err
     }
 
-    return $token
 }
 
 # Data access functions:
@@ -865,7 +867,7 @@ proc http::cleanup {token} {
 #	Sets the status of the connection, which unblocks
 # 	the waiting geturl call
 
-proc http::Connect {token} {
+proc http::Connect {token proto phost srvurl} {
     variable $token
     upvar 0 $token state
     set err "due to unexpected EOF"
@@ -873,10 +875,10 @@ proc http::Connect {token} {
 	[eof $state(sock)] ||
 	[set err [fconfigure $state(sock) -error]] ne ""
     } {
-	Finish $token "connect failed $err" 1
+	Finish $token "connect failed $err"
     } else {
-	set state(status) connect
 	fileevent $state(sock) writable {}
+	::http::Connected $token $proto $phost $srvurl
     }
     return
 }
diff --git a/library/init.tcl b/library/init.tcl
index e836df9..bedc06e 100644
--- a/library/init.tcl
+++ b/library/init.tcl
@@ -12,6 +12,7 @@
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
 
+# This test intentionally written in pre-7.5 Tcl 
 if {[info commands package] == ""} {
     error "version mismatch: library\nscripts expect Tcl version 7.5b1 or later but the loaded version is\nonly [info patchlevel]"
 }
@@ -116,9 +117,10 @@ namespace eval tcl {
 if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} {
     namespace eval tcl {
 	proc EnvTraceProc {lo n1 n2 op} {
-	    set x $::env($n2)
-	    set ::env($lo) $x
-	    set ::env([string toupper $lo]) $x
+	    global env
+	    set x $env($n2)
+	    set env($lo) $x
+	    set env([string toupper $lo]) $x
 	}
 	proc InitWinEnv {} {
 	    global env tcl_platform
@@ -159,8 +161,8 @@ if {[interp issafe]} {
 } else {
     # Set up search for Tcl Modules (TIP #189).
     # and setup platform specific unknown package handlers
-    if {$::tcl_platform(os) eq "Darwin"
-	    && $::tcl_platform(platform) eq "unix"} {
+    if {$tcl_platform(os) eq "Darwin"
+	    && $tcl_platform(platform) eq "unix"} {
 	package unknown {::tcl::tm::UnknownHandler \
 		{::tcl::MacOSXPkgUnknown ::tclPkgUnknown}}
     } else {
@@ -233,14 +235,13 @@ if {[namespace which -command tclLog] eq ""} {
 
 proc unknown args {
     variable ::tcl::UnknownPending
-    global auto_noexec auto_noload env tcl_interactive
+    global auto_noexec auto_noload env tcl_interactive errorInfo errorCode
 
-
-    if {[info exists ::errorInfo]} {
-	set savedErrorInfo $::errorInfo
+    if {[info exists errorInfo]} {
+	set savedErrorInfo $errorInfo
     }
-    if {[info exists ::errorCode]} {
-	set savedErrorCode $::errorCode
+    if {[info exists errorCode]} {
+	set savedErrorCode $errorCode
     }
 
     set name [lindex $args 0]
@@ -271,9 +272,9 @@ proc unknown args {
 		unset -nocomplain ::errorCode
 	    }
 	    if {[info exists savedErrorInfo]} {
-		set ::errorInfo $savedErrorInfo
+		set errorInfo $savedErrorInfo
 	    } else {
-		unset -nocomplain ::errorInfo
+		unset -nocomplain errorInfo
 	    }
 	    set code [catch {uplevel 1 $args} msg opts]
 	    if {$code ==  1} {
@@ -282,8 +283,8 @@ proc unknown args {
 		# Note the dependence on how Tcl_AddErrorInfo, etc.
 		# construct the stack trace.
 		#
-		set errorInfo [dict get $opts -errorinfo]
-		set errorCode [dict get $opts -errorcode]
+		set errInfo [dict get $opts -errorinfo]
+		set errCode [dict get $opts -errorcode]
 		set cinfo $args
 		if {[string bytelength $cinfo] > 150} {
 		    set cinfo [string range $cinfo 0 150]
@@ -300,7 +301,7 @@ proc unknown args {
 		# and trim the extra contribution from the matching case
 		#
 		set expect "$msg\n    while executing\n\"$cinfo"
-		if {$errorInfo eq $expect} {
+		if {$errInfo eq $expect} {
 		    #
 		    # The stack has only the eval from the expanded command
 		    # Do not generate any stack trace here.
@@ -315,18 +316,18 @@ proc unknown args {
 		#
 		set expect "\n    invoked from within\n\"$cinfo"
 		set exlen [string length $expect]
-		set eilen [string length $errorInfo]
+		set eilen [string length $errInfo]
 		set i [expr {$eilen - $exlen - 1}]
-		set einfo [string range $errorInfo 0 $i]
+		set einfo [string range $errInfo 0 $i]
 		#
-		# For now verify that $errorInfo consists of what we are about
+		# For now verify that $errInfo consists of what we are about
 		# to return plus what we expected to trim off.
 		#
-		if {$errorInfo ne "$einfo$expect"} {
+		if {$errInfo ne "$einfo$expect"} {
 		    error "Tcl bug: unexpected stack trace in \"unknown\"" {} \
-			[list CORE UNKNOWN BADTRACE $einfo $expect $errorInfo]
+			[list CORE UNKNOWN BADTRACE $einfo $expect $errInfo]
 		}
-		return -code error -errorcode $errorCode \
+		return -code error -errorcode $errCode \
 			-errorinfo $einfo $msg
 	    } else {
 		dict incr opts -level
@@ -335,7 +336,7 @@ proc unknown args {
 	}
     }
 
-    if {([info level] == 1) && ([info script] eq "") \
+    if {([info level] == 1) && ([info script] eq "") 
 	    && [info exists tcl_interactive] && $tcl_interactive} {
 	if {![info exists auto_noexec]} {
 	    set new [auto_execok $name]
@@ -788,7 +789,7 @@ proc tcl::CopyDirectory {action src dest} {
 	    lappend existing {*}[glob -nocomplain -directory $dest \
 		    -type hidden * .*]
 	    foreach s $existing {
-		if {([file tail $s] ne ".") && ([file tail $s] ne "..")} {
+		if {[file tail $s] ni {. ..}} {
 		    return -code error "error $action \"$src\" to\
 		      \"$dest\": file already exists"
 		}
@@ -796,7 +797,7 @@ proc tcl::CopyDirectory {action src dest} {
 	}
     } else {
 	if {[string first $nsrc $ndest] != -1} {
-	    set srclen [expr {[llength [file split $nsrc]] -1}]
+	    set srclen [expr {[llength [file split $nsrc]] - 1}]
 	    set ndest [lindex [file split $ndest] $srclen]
 	    if {$ndest eq [file tail $nsrc]} {
 		return -code error "error $action \"$src\" to\
@@ -816,37 +817,9 @@ proc tcl::CopyDirectory {action src dest} {
       [glob -nocomplain -directory $src -types hidden *]]
 
     foreach s [lsort -unique $filelist] {
-	if {([file tail $s] ne ".") && ([file tail $s] ne "..")} {
-	    file copy -force $s [file join $dest [file tail $s]]
+	if {[file tail $s] ni {. ..}} {
+	    file copy -force -- $s [file join $dest [file tail $s]]
 	}
     }
     return
 }
-
-# TIP 131
-if 0 {
-proc tcl::rmmadwiw {} {
-    set magic {
-        42 83 fe f6 ff f8 f1 e5 c6 f9 eb fd ff fb f1 e5 cc f5 ec f5 e3 fd fe
-        ff f5 fa f3 e1 c7 f9 f2 fd ff f9 fe f9 ed f4 fa f6 e6 f9 f2 e6 fd f9
-        ff f9 f6 e6 fa fd ff fc fb fc f9 f1 ed
-    }
-    foreach mystic [lassign $magic tragic] {
-        set comic [expr (0x$mystic ^ 0x$tragic) - 255 + 0x$tragic]
-        append logic [format %x $comic]
-        set tragic $mystic
-    }
-    binary format H* $logic
-}
-
-proc tcl::mathfunc::rmmadwiw {} {
-    set age [expr {9*6}]
-    set mind ""
-    while {$age} {
-        lappend mind [expr {$age%13}]
-        set age [expr {$age/13}]
-    }
-    set matter [lreverse $mind]
-    return [join $matter ""]
-}
-}
diff --git a/library/package.tcl b/library/package.tcl
index c30431c..52daa0e 100644
--- a/library/package.tcl
+++ b/library/package.tcl
@@ -395,9 +395,7 @@ proc pkg_mkIndex {args} {
 
     foreach pkg [lsort [array names files]] {
 	set cmd {}
-	foreach {name version} $pkg {
-	    break
-	}
+	lassign $pkg name version
 	lappend cmd ::tcl::Pkg::Create -name $name -version $version
 	foreach spec [lsort -index 0 $files($pkg)] {
 	    foreach {file type procs} $spec {
@@ -544,8 +542,7 @@ proc tclPkgUnknown {name args} {
 	# Don't add directories we've already seen, or ones already on the
 	# $use_path.
 	foreach dir [lrange $auto_path $index end] {
-	    if {![info exists tclSeenPath($dir)]
-		    && ([lsearch -exact $use_path $dir] == -1) } {
+	    if {![info exists tclSeenPath($dir)] && ($dir ni $use_path)} {
 		lappend use_path $dir
 	    }
 	}
@@ -628,8 +625,7 @@ proc tcl::MacOSXPkgUnknown {original name args} {
 	# Don't add directories we've already seen, or ones already on the
 	# $use_path.
 	foreach dir [lrange $auto_path $index end] {
-	    if {![info exists tclSeenPath($dir)]
-		    && ([lsearch -exact $use_path $dir] == -1) } {
+	    if {![info exists tclSeenPath($dir)] && ($dir ni $use_path)} {
 		lappend use_path $dir
 	    }
 	}
@@ -681,10 +677,7 @@ proc ::tcl::Pkg::Create {args} {
     }
 
     # Initialize parameters
-    set opts(-name)		{}
-    set opts(-version)		{}
-    set opts(-source)		{}
-    set opts(-load)		{}
+    array set opts {-name {} -version {} -source {} -load {}}
 
     # process parameters
     for {set i 0} {$i < $len} {incr i} {
@@ -732,14 +725,9 @@ proc ::tcl::Pkg::Create {args} {
     # Handle -load and -source specs
     foreach key {load source} {
 	foreach filespec $opts(-$key) {
-	    foreach {filename proclist} {{} {}} {
-		break
-	    }
-	    foreach {filename proclist} $filespec {
-		break
-	    }
-
-	    if {![llength $proclist]} {
+	    lassign $filespec filename proclist
+	    
+	    if { [llength $proclist] == 0 } {
 		set cmd "\[list $key \[file join \$dir [list $filename]\]\]"
 		lappend cmdList $cmd
 	    } else {
diff --git a/library/platform/pkgIndex.tcl b/library/platform/pkgIndex.tcl
index 220a67b..b882e4f 100644
--- a/library/platform/pkgIndex.tcl
+++ b/library/platform/pkgIndex.tcl
@@ -1,3 +1,3 @@
-package ifneeded platform        1.0.10 [list source [file join $dir platform.tcl]]
+package ifneeded platform        1.0.11 [list source [file join $dir platform.tcl]]
 package ifneeded platform::shell 1.1.4 [list source [file join $dir shell.tcl]]
 
diff --git a/library/platform/platform.tcl b/library/platform/platform.tcl
index dd2e66b..a1a728b 100644
--- a/library/platform/platform.tcl
+++ b/library/platform/platform.tcl
@@ -256,7 +256,7 @@ proc ::platform::LibcVersion {base _->_ vv} {
     if {![catch {
 	set vdata [lindex [split [exec $libc] \n] 0]
     }]} {
-	regexp {([0-9]+(\.[0-9]+)*)} $vdata -> v
+	regexp {version ([0-9]+(\.[0-9]+)*), by} $vdata -> v
 	foreach {major minor} [split $v .] break
 	set v glibc${major}.${minor}
 	return 1
@@ -368,7 +368,7 @@ proc ::platform::patterns {id} {
 # ### ### ### ######### ######### #########
 ## Ready
 
-package provide platform 1.0.10
+package provide platform 1.0.11
 
 # ### ### ### ######### ######### #########
 ## Demo application
diff --git a/library/tcltest/tcltest.tcl b/library/tcltest/tcltest.tcl
index 83ec9d3..d6e6487 100644
--- a/library/tcltest/tcltest.tcl
+++ b/library/tcltest/tcltest.tcl
@@ -84,7 +84,7 @@ namespace eval tcltest {
     #     None.
     #
     proc normalizePath {pathVar} {
-	upvar $pathVar path
+	upvar 1 $pathVar path
 	set oldpwd [pwd]
 	catch {cd $path}
 	set path [pwd]
@@ -247,15 +247,15 @@ namespace eval tcltest {
 
     # Kept only for compatibility
     Default constraintsSpecified {} AcceptList
-    trace variable constraintsSpecified r {set ::tcltest::constraintsSpecified \
-		[array names ::tcltest::testConstraints] ;# }
+    trace add variable constraintsSpecified read [namespace code {
+	    set constraintsSpecified [array names testConstraints] ;#}]
 
     # tests that use threads need to know which is the main thread
     Default mainThread 1
     variable mainThread
-    if {[info commands thread::id] != {}} {
+    if {[info commands thread::id] ne {}} {
 	set mainThread [thread::id]
-    } elseif {[info commands testthread] != {}} {
+    } elseif {[info commands testthread] ne {}} {
 	set mainThread [testthread id]
     }
 
@@ -263,7 +263,7 @@ namespace eval tcltest {
     # Tcl tests is the working directory.  Whenever this value changes
     # change to that directory.
     variable workingDirectory
-    trace variable workingDirectory w \
+    trace add variable workingDirectory write \
 	    [namespace code {cd $workingDirectory ;#}]
 
     Default workingDirectory [pwd] AcceptAbsolutePath
@@ -277,7 +277,7 @@ namespace eval tcltest {
 
     # Set the location of the execuatble
     Default tcltest [info nameofexecutable]
-    trace variable tcltest w [namespace code {testConstraint stdio \
+    trace add variable tcltest write [namespace code {testConstraint stdio \
 	    [eval [ConstraintInitializer stdio]] ;#}]
 
     # save the platform information so it can be restored later
@@ -404,11 +404,11 @@ namespace eval tcltest {
 		# already there.
 		set outdir [normalizePath [file dirname \
 			[file join [pwd] $filename]]]
-		if {[string equal $outdir [temporaryDirectory]]} {
+		if {$outdir eq [temporaryDirectory]} {
 		    variable filesExisted
 		    FillFilesExisted
 		    set filename [file tail $filename]
-		    if {[lsearch -exact $filesExisted $filename] == -1} {
+		    if {$filename ni $filesExisted} {
 			lappend filesExisted $filename
 		    }
 		}
@@ -448,11 +448,11 @@ namespace eval tcltest {
 		# already there.
 		set outdir [normalizePath [file dirname \
 			[file join [pwd] $filename]]]
-		if {[string equal $outdir [temporaryDirectory]]} {
+		if {$outdir eq [temporaryDirectory]} {
 		    variable filesExisted
 		    FillFilesExisted
 		    set filename [file tail $filename]
-		    if {[lsearch -exact $filesExisted $filename] == -1} {
+		    if {$filename ni $filesExisted} {
 			lappend filesExisted $filename
 		    }
 		}
@@ -534,7 +534,7 @@ namespace eval tcltest {
 	    }
 	    default {
 		# Exact match trumps ambiguity
-		if {[lsearch -exact $match $option] >= 0} {
+		if {$option in $match} {
 		    return $option
 		}
 		set values [join [lrange $match 0 end-1] ", "]
@@ -549,7 +549,8 @@ namespace eval tcltest {
 	variable OptionControlledVariables
 	foreach varName [concat $OptionControlledVariables Option] {
 	    variable $varName
-	    trace variable $varName r [namespace code {ProcessCmdLineArgs ;#}]
+	    trace add variable $varName read [namespace code {
+		    ProcessCmdLineArgs ;#}]
 	}
     }
 
@@ -557,11 +558,11 @@ namespace eval tcltest {
 	variable OptionControlledVariables
 	foreach varName [concat $OptionControlledVariables Option] {
 	    variable $varName
-	    foreach pair [trace vinfo $varName] {
-		foreach {op cmd} $pair break
-		if {[string equal r $op]
-			&& [string match *ProcessCmdLineArgs* $cmd]} {
-		    trace vdelete $varName $op $cmd
+	    foreach pair [trace info variable $varName] {
+		lassign $pair op cmd
+		if {($op eq "read") &&
+			[string match *ProcessCmdLineArgs* $cmd]} {
+		    trace remove variable $varName $op $cmd
 		}
 	    }
 	}
@@ -698,7 +699,7 @@ namespace eval tcltest {
     Option -constraints {} {
 	Do not skip the listed constraints listed in -constraints.
     } AcceptList
-    trace variable Option(-constraints) w \
+    trace add variable Option(-constraints) write \
 	    [namespace code {SetSelectedConstraints ;#}]
 
     # Don't run only the "-constraint" specified tests by default
@@ -707,7 +708,7 @@ namespace eval tcltest {
 	variable testConstraints
 	if {!$Option(-limitconstraints)} {return}
 	foreach c [array names testConstraints] {
-	    if {[lsearch -exact $Option(-constraints) $c] == -1} {
+	    if {$c ni $Option(-constraints)} {
 		testConstraint $c 0
 	    }
 	}
@@ -715,7 +716,7 @@ namespace eval tcltest {
     Option -limitconstraints 0 {
 	whether to run only tests with the constraints
     } AcceptBoolean limitConstraints 
-    trace variable Option(-limitconstraints) w \
+    trace add variable Option(-limitconstraints) write \
 	    [namespace code {ClearUnselectedConstraints ;#}]
 
     # A test application has to know how to load the tested commands
@@ -736,7 +737,7 @@ namespace eval tcltest {
 	}
 	set directory [AcceptDirectory $directory]
 	if {![file writable $directory]} {
-	    if {[string equal [workingDirectory] $directory]} {
+	    if {[workingDirectory] eq $directory} {
 		# Special exception: accept the default value
 		# even if the directory is not writable
 		return $directory
@@ -750,7 +751,7 @@ namespace eval tcltest {
     Option -tmpdir [workingDirectory] {
 	Save temporary files in the specified directory.
     } AcceptTemporaryDirectory temporaryDirectory
-    trace variable Option(-tmpdir) w \
+    trace add variable Option(-tmpdir) write \
 	    [namespace code {normalizePath Option(-tmpdir) ;#}]
 
     # Tests should not rely on the current working directory.
@@ -759,17 +760,17 @@ namespace eval tcltest {
     Option -testdir [workingDirectory] {
 	Search tests in the specified directory.
     } AcceptDirectory testsDirectory
-    trace variable Option(-testdir) w \
+    trace add variable Option(-testdir) write \
 	    [namespace code {normalizePath Option(-testdir) ;#}]
 
     proc AcceptLoadFile { file } {
-	if {[string equal "" $file]} {return $file}
+	if {$file eq {}} {return $file}
 	set file [file join [temporaryDirectory] $file]
 	return [AcceptReadable $file]
     }
     proc ReadLoadScript {args} {
 	variable Option
-	if {[string equal "" $Option(-loadfile)]} {return}
+	if {$Option(-loadfile) eq {}} {return}
 	set tmp [open $Option(-loadfile) r]
 	loadScript [read $tmp]
 	close $tmp
@@ -777,7 +778,7 @@ namespace eval tcltest {
     Option -loadfile {} {
 	Read the script to load the tested commands from the specified file.
     } AcceptLoadFile loadFile
-    trace variable Option(-loadfile) w [namespace code ReadLoadScript]
+    trace add variable Option(-loadfile) write [namespace code ReadLoadScript]
 
     proc AcceptOutFile { file } {
 	if {[string equal stderr $file]} {return $file}
@@ -789,14 +790,14 @@ namespace eval tcltest {
     Option -outfile stdout {
 	Send output from test runs to the specified file.
     } AcceptOutFile outputFile
-    trace variable Option(-outfile) w \
+    trace add variable Option(-outfile) write \
 	    [namespace code {outputChannel $Option(-outfile) ;#}]
 
     # errors go to stderr by default
     Option -errfile stderr {
 	Send errors from test runs to the specified file.
     } AcceptOutFile errorFile
-    trace variable Option(-errfile) w \
+    trace add variable Option(-errfile) write \
 	    [namespace code {errorChannel $Option(-errfile) ;#}]
 
     proc loadIntoSlaveInterpreter {slave args} {
@@ -877,7 +878,7 @@ proc tcltest::DebugPArray {level arrayvar} {
     variable debug
 
     if {$debug >= $level} {
-	catch {upvar  $arrayvar $arrayvar}
+	catch {upvar 1 $arrayvar $arrayvar}
 	parray $arrayvar
     }
     return
@@ -961,8 +962,7 @@ proc tcltest::testConstraint {constraint {value ""}} {
     if {[catch {expr {$value && $value}} msg]} {
 	return -code error $msg
     }
-    if {[limitConstraints] 
-	    && [lsearch -exact $Option(-constraints) $constraint] == -1} {
+    if {[limitConstraints] && ($constraint ni $Option(-constraints))} {
 	set value 0
     }
     set testConstraints($constraint) $value
@@ -986,11 +986,7 @@ proc tcltest::interpreter { {interp ""} } {
     if {[llength [info level 0]] == 1} {
 	return $tcltest
     }
-    if {[string equal {} $interp]} {
-	set tcltest {}
-    } else {
-	set tcltest $interp
-    }
+    set tcltest $interp
 }
 
 #####################################################################
@@ -1055,7 +1051,7 @@ proc tcltest::PrintError {errorMsg} {
 		[expr {80 - $InitialMsgLen}]]]
 	puts [errorChannel] [string range $errorMsg 0 $beginningIndex]
 
-	while {![string equal end $beginningIndex]} {
+	while {$beginningIndex ne "end"} {
 	    puts -nonewline [errorChannel] \
 		    [string repeat " " $InitialMsgLen]
 	    if {($endingIndex - $beginningIndex)
@@ -1108,7 +1104,7 @@ proc tcltest::PrintError {errorMsg} {
 proc tcltest::SafeFetch {n1 n2 op} {
     variable testConstraints
     DebugPuts 3 "entering SafeFetch $n1 $n2 $op"
-    if {[string equal {} $n2]} {return}
+    if {$n2 eq {}} {return}
     if {![info exists testConstraints($n2)]} {
 	if {[catch {testConstraint $n2 [eval [ConstraintInitializer $n2]]}]} {
 	    testConstraint $n2 0
@@ -1253,9 +1249,8 @@ proc tcltest::DefineConstraintInitializers {} {
     # are running as root on Unix.
 
     ConstraintInitializer root {expr \
-	    {[string equal unix $::tcl_platform(platform)]
-	    && ([string equal root $::tcl_platform(user)]
-		|| [string equal "" $::tcl_platform(user)])}}
+	    {($::tcl_platform(platform) eq "unix") &&
+		    ($::tcl_platform(user) in {root {}})}}
     ConstraintInitializer notRoot {expr {![testConstraint root]}}
 
     # Set nonBlockFiles constraint: 1 means this platform supports
@@ -1263,7 +1258,7 @@ proc tcltest::DefineConstraintInitializers {} {
 
     ConstraintInitializer nonBlockFiles {
 	    set code [expr {[catch {set f [open defs r]}] 
-		    || [catch {fconfigure $f -blocking off}]}]
+		    || [catch {chan configure $f -blocking off}]}]
 	    catch {close $f}
 	    set code
     }
@@ -1289,10 +1284,10 @@ proc tcltest::DefineConstraintInitializers {} {
 
     ConstraintInitializer unixExecs {
 	set code 1
-        if {[string equal macintosh $::tcl_platform(platform)]} {
+        if {$::tcl_platform(platform) eq "macintosh"} {
 	    set code 0
         }
-        if {[string equal windows $::tcl_platform(platform)]} {
+        if {$::tcl_platform(platform) eq "windows"} {
 	    if {[catch {
 	        set file _tcl_test_remove_me.txt
 	        makeFile {hello} $file
@@ -1386,7 +1381,7 @@ proc tcltest::Usage { {option ""} } {
 	set allOpts [concat -help [Configure]]
 	foreach opt $allOpts {
 	    set foo [Usage $opt]
-	    foreach [list x type($opt) usage($opt)] $foo break
+	    lassign $foo x type($opt) usage($opt)
 	    set line($opt) "  $opt $type($opt)  "
 	    set length($opt) [string length $line($opt)]
 	    if {$length($opt) > $max} {set max $length($opt)}
@@ -1410,7 +1405,7 @@ proc tcltest::Usage { {option ""} } {
 	    append msg $u
 	}
 	return $msg\n
-    } elseif {[string equal -help $option]} {
+    } elseif {$option eq "-help"} {
 	return [list -help "" "Display this usage information."]
     } else {
 	set type [lindex [info args $Verify($option)] 0]
@@ -1436,7 +1431,7 @@ proc tcltest::Usage { {option ""} } {
 
 proc tcltest::ProcessFlags {flagArray} {
     # Process -help first
-    if {[lsearch -exact $flagArray {-help}] != -1} {
+    if {"-help" in $flagArray} {
 	PrintUsageInfo
 	exit 1
     }
@@ -1445,14 +1440,14 @@ proc tcltest::ProcessFlags {flagArray} {
 	RemoveAutoConfigureTraces
     } else {
 	set args $flagArray
-	while {[llength $args]>1 && [catch {configure {*}$args} msg]} {
+	while {[llength $args] > 1 && [catch {configure {*}$args} msg]} {
 
 	    # Something went wrong parsing $args for tcltest options
 	    # Check whether the problem is "unknown option"
 	    if {[regexp {^unknown option (\S+):} $msg -> option]} {
 		# Could be this is an option the Hook knows about
 		set moreOptions [processCmdLineArgsAddFlagsHook]
-		if {[lsearch -exact $moreOptions $option] == -1} {
+		if {$option ni $moreOptions} {
 		    # Nope.  Report the error, including additional options,
 		    # but keep going
 		    if {[llength $moreOptions]} {
@@ -1471,7 +1466,7 @@ proc tcltest::ProcessFlags {flagArray} {
 
 	    # To recover, find that unknown option and remove up to it.
 	    # then retry
-	    while {![string equal [lindex $args 0] $option]} {
+	    while {[lindex $args 0] ne $option} {
 		set args [lrange $args 2 end]
 	    }
 	    set args [lrange $args 2 end]
@@ -1577,7 +1572,7 @@ proc tcltest::Replace::puts {args} {
 	}
 	2 {
 	    # Either -nonewline or channelId has been specified
-	    if {[string equal -nonewline [lindex $args 0]]} {
+	    if {[lindex $args 0] eq "-nonewline"} {
 		append outData [lindex $args end]
 		return
 		# return [Puts -nonewline [lindex $args end]]
@@ -1587,7 +1582,7 @@ proc tcltest::Replace::puts {args} {
 	    }
 	}
 	3 {
-	    if {[string equal -nonewline [lindex $args 0]]} {
+	    if {[lindex $args 0] eq "-nonewline"} {
 		# Both -nonewline and channelId are specified, unless
 		# it's an error.  -nonewline is supposed to be argv[0].
 		set channel [lindex $args 1]
@@ -1597,12 +1592,10 @@ proc tcltest::Replace::puts {args} {
     }
 
     if {[info exists channel]} {
-	if {[string equal $channel [[namespace parent]::outputChannel]]
-		|| [string equal $channel stdout]} {
+	if {$channel in [list [[namespace parent]::outputChannel] stdout]} {
 	    append outData [lindex $args end]$newline
 	    return
-	} elseif {[string equal $channel [[namespace parent]::errorChannel]]
-		|| [string equal $channel stderr]} {
+	} elseif {$channel in [list [[namespace parent]::errorChannel] stderr]} {
 	    append errData [lindex $args end]$newline
 	    return
 	}
@@ -1771,7 +1764,7 @@ proc tcltest::SubstArguments {argList} {
             set argList {}
         }
 
-        if {$token != {}} {
+        if {$token ne {}} {
             # If we saw a word with quote before, then there is a
             # multi-word token starting with that word.  In this case,
             # add the text and the current word to this token.
@@ -1878,10 +1871,7 @@ proc tcltest::test {name description args} {
     # Pre-define everything to null except output and errorOutput.  We
     # determine whether or not to trap output based on whether or not
     # these variables (output & errorOutput) are defined.
-    foreach item {constraints setup cleanup body result returnCodes
-	    match} {
-	set $item {}
-    }
+    lassign {} constraints setup cleanup body result returnCodes match
 
     # Set the default match mode
     set match exact
@@ -1893,8 +1883,7 @@ proc tcltest::test {name description args} {
 
     # The old test format can't have a 3rd argument (constraints or
     # script) that starts with '-'.
-    if {[string match -* [lindex $args 0]]
-	    || ([llength $args] <= 1)} {
+    if {[string match -* [lindex $args 0]] || ([llength $args] <= 1)} {
 	if {[llength $args] == 1} {
 	    set list [SubstArguments [lindex $args 0]]
 	    foreach {element value} $list {
@@ -1915,7 +1904,7 @@ proc tcltest::test {name description args} {
 		-match -output -errorOutput -constraints}
 
 	foreach flag [array names testAttributes] {
-	    if {[lsearch -exact $validFlags $flag] == -1} {
+	    if {$flag ni $validFlags} {
 		incr testLevel -1
 		set sorted [lsort $validFlags]
 		set options [join [lrange $sorted 0 end-1] ", "]
@@ -1931,7 +1920,7 @@ proc tcltest::test {name description args} {
 
 	# Check the values supplied for -match
 	variable CustomMatch
-	if {[lsearch [array names CustomMatch] $match] == -1} {
+	if {$match ni [array names CustomMatch]} {
 	    incr testLevel -1
 	    set sorted [lsort [array names CustomMatch]]
 	    set values [join [lrange $sorted 0 end-1] ", "]
@@ -1995,7 +1984,7 @@ proc tcltest::test {name description args} {
 	} else {
 	    set testResult [uplevel 1 [list [namespace origin Eval] $command 1]]
 	}
-	foreach {actualAnswer returnCode} $testResult break
+	lassign $testResult actualAnswer returnCode
 	if {$returnCode == 1} {
 	    set errorInfo(body) $::errorInfo
 	    set errorCode(body) $::errorCode
@@ -2031,11 +2020,11 @@ proc tcltest::test {name description args} {
 	    if {([preserveCore] > 1) && ($coreFailure)} {
 		append coreMsg "\nMoving file to:\
 		    [file join [temporaryDirectory] core-$name]"
-		catch {file rename -force \
+		catch {file rename -force -- \
 		    [file join [workingDirectory] core] \
 		    [file join [temporaryDirectory] core-$name]
 		} msg
-		if {[string length $msg] > 0} {
+		if {$msg ne {}} {
 		    append coreMsg "\nError:\
 			Problem renaming core file: $msg"
 		}
@@ -2045,7 +2034,7 @@ proc tcltest::test {name description args} {
 
     # check if the return code matched the expected return code
     set codeFailure 0
-    if {!$setupFailure && [lsearch -exact $returnCodes $returnCode] == -1} {
+    if {!$setupFailure && ($returnCode ni $returnCodes)} {
 	set codeFailure 1
     }
 
@@ -2124,7 +2113,7 @@ proc tcltest::test {name description args} {
 		set testFd [open $testFile r]
 		set testLine [expr {[lsearch -regexp \
 			[split [read $testFd] "\n"] \
-			"^\[ \t\]*test [string map {. \\.} $name] "]+1}]
+			"^\[ \t\]*test [string map {. \\.} $name] "] + 1}]
 		close $testFd
 	    }
 	}
@@ -2169,7 +2158,7 @@ proc tcltest::test {name description args} {
 	puts [outputChannel] "---- Return code should have been\
 		one of: $returnCodes"
 	if {[IsVerbose error]} {
-	    if {[info exists errorInfo(body)] && ([lsearch $returnCodes 1]<0)} {
+	    if {[info exists errorInfo(body)] && (1 ni $returnCodes)} {
 		puts [outputChannel] "---- errorInfo: $errorInfo(body)"
 		puts [outputChannel] "---- errorCode: $errorCode(body)"
 	    }
@@ -2250,7 +2239,7 @@ proc tcltest::Skipped {name constraints} {
 	}
 	return 1
     }
-    if {[string equal {} $constraints]} {
+    if {$constraints eq {}} {
 	# If we're limited to the listed constraints and there aren't
 	# any listed, then we shouldn't run the test.
 	if {[limitConstraints]} {
@@ -2401,7 +2390,7 @@ proc tcltest::cleanupTests {{calledFromAllFile 0}} {
 	foreach file $filesMade {
 	    if {[file exists $file]} {
 		DebugDo 1 {Warn "cleanupTests deleting $file..."}
-		catch {file delete -force $file}
+		catch {file delete -force -- $file}
 	    }
 	}
 	set currentFiles {}
@@ -2411,7 +2400,7 @@ proc tcltest::cleanupTests {{calledFromAllFile 0}} {
 	}
 	set newFiles {}
 	foreach file $currentFiles {
-	    if {[lsearch -exact $filesExisted $file] == -1} {
+	    if {$file ni $filesExisted} {
 		lappend newFiles $file
 	    }
 	}
@@ -2494,8 +2483,7 @@ proc tcltest::cleanupTests {{calledFromAllFile 0}} {
 	# then add current file to failFile list if any tests in this
 	# file failed
 
-	if {$currentFailure \
-		&& ([lsearch -exact $failFiles $testFileName] == -1)} {
+	if {$currentFailure && ($testFileName ni $failFiles)} {
 	    lappend failFiles $testFileName
 	}
 	set currentFailure false
@@ -2555,11 +2543,11 @@ proc tcltest::cleanupTests {{calledFromAllFile 0}} {
 		puts [outputChannel] "produced core file! \
 			Moving file to: \
 			[file join [temporaryDirectory] core-$testFileName]"
-		catch {file rename -force \
+		catch {file rename -force -- \
 			[file join [workingDirectory] core] \
 			[file join [temporaryDirectory] core-$testFileName]
 		} msg
-		if {[string length $msg] > 0} {
+		if {$msg ne {}} {
 		    PrintError "Problem renaming file: $msg"
 		}
 	    } else {
@@ -2637,7 +2625,7 @@ proc tcltest::GetMatchingFiles { args } {
 
 	# Add to result list all files in match list and not in skip list
 	foreach file $matchFileList {
-	    if {[lsearch -exact $skipFileList $file] == -1} {
+	    if {$file ni $skipFileList} {
 		lappend matchingFiles $file
 	    }
 	}
@@ -2684,7 +2672,7 @@ proc tcltest::GetMatchingDirectories {rootdir} {
     foreach pattern [matchDirectories] {
 	foreach path [glob -directory $rootdir -types d -nocomplain -- \
 		$pattern] {
-	    if {[lsearch -exact $skipDirs $path] == -1} {
+	    if {$path ni $skipDirs} {
 		set matchDirs [concat $matchDirs [GetMatchingDirectories $path]]
 		if {[file exists [file join $path all.tcl]]} {
 		    lappend matchDirs $path
@@ -2737,7 +2725,7 @@ proc tcltest::runAllTests { {shell ""} } {
 
     # [file system] first available in Tcl 8.4
     if {![catch {file system [testsDirectory]} result]
-	    && ![string equal native [lindex $result 0]]} {
+	    && ([lindex $result 0] ne "native")} {
 	# If we aren't running in the native filesystem, then we must
 	# run the tests in a single process (via 'source'), because
 	# trying to run then via a pipe will fail since the files don't
@@ -2784,10 +2772,10 @@ proc tcltest::runAllTests { {shell ""} } {
 	    # needs to read and process output of children.
 	    set childargv [list]
 	    foreach opt [Configure] {
-		if {[string equal $opt -outfile]} {continue}
+		if {$opt eq "-outfile"} {continue}
 		set value [Configure $opt]
 		# Don't bother passing default configuration options
-		if {[string equal $value $DefaultValue($opt)]} {
+		if {$value eq $DefaultValue($opt)} {
 			continue
 		}
 		lappend childargv $opt $value
@@ -2880,11 +2868,6 @@ proc tcltest::runAllTests { {shell ""} } {
 #     none.
 
 proc tcltest::loadTestedCommands {} {
-    variable l
-    if {[string equal {} [loadScript]]} {
-	return
-    }
-
     return [uplevel 1 [loadScript]]
 }
 
@@ -2927,16 +2910,15 @@ proc tcltest::saveState {} {
 proc tcltest::restoreState {} {
     variable saveState
     foreach p [uplevel 1 {::info procs}] {
-	if {([lsearch [lindex $saveState 0] $p] < 0)
-		&& ![string equal [namespace current]::$p \
-		[uplevel 1 [list ::namespace origin $p]]]} {
+	if {($p ni [lindex $saveState 0]) && ("[namespace current]::$p" ne
+		[uplevel 1 [list ::namespace origin $p]])} {
 
 	    DebugPuts 2 "[lindex [info level 0] 0]: Removing proc $p"
 	    uplevel 1 [list ::catch [list ::rename $p {}]]
 	}
     }
     foreach p [uplevel 1 {::info vars}] {
-	if {[lsearch [lindex $saveState 1] $p] < 0} {
+	if {$p ni [lindex $saveState 1]} {
 	    DebugPuts 2 "[lindex [info level 0] 0]:\
 		    Removing variable $p"
 	    uplevel 1 [list ::catch [list ::unset $p]]
@@ -2997,15 +2979,15 @@ proc tcltest::makeFile {contents name {directory ""}} {
 	     putting ``$contents'' into $fullName"
 
     set fd [open $fullName w]
-    fconfigure $fd -translation lf
-    if {[string equal [string index $contents end] \n]} {
+    chan configure $fd -translation lf
+    if {[string index $contents end] eq "\n"} {
 	puts -nonewline $fd $contents
     } else {
 	puts $fd $contents
     }
     close $fd
 
-    if {[lsearch -exact $filesMade $fullName] == -1} {
+    if {$fullName ni $filesMade} {
 	lappend filesMade $fullName
     }
     return $fullName
@@ -3045,7 +3027,7 @@ proc tcltest::removeFile {name {directory ""}} {
 	    Warn "removeFile removing \"$fullName\":\n  not a file"
 	}
     }
-    return [file delete $fullName]
+    return [file delete -- $fullName]
 }
 
 # tcltest::makeDirectory --
@@ -3075,7 +3057,7 @@ proc tcltest::makeDirectory {name {directory ""}} {
     set fullName [file join $directory $name]
     DebugPuts 3 "[lindex [info level 0] 0]: creating $fullName"
     file mkdir $fullName
-    if {[lsearch -exact $filesMade $fullName] == -1} {
+    if {$fullName ni $filesMade} {
 	lappend filesMade $fullName
     }
     return $fullName
@@ -3116,7 +3098,7 @@ proc tcltest::removeDirectory {name {directory ""}} {
 	    Warn "removeDirectory removing \"$fullName\":\n  not a directory"
 	}
     }
-    return [file delete -force $fullName]
+    return [file delete -force -- $fullName]
 }
 
 # tcltest::viewFile --
@@ -3213,7 +3195,7 @@ proc tcltest::LeakFiles {old} {
     }
     set leak {}
     foreach p $new {
-	if {[lsearch $old $p] < 0} {
+	if {$p ni $old} {
 	    lappend leak $p
 	}
     }
@@ -3284,7 +3266,7 @@ proc tcltest::RestoreLocale {} {
 #
 
 proc tcltest::threadReap {} {
-    if {[info commands testthread] != {}} {
+    if {[info commands testthread] ne {}} {
 
 	# testthread built into tcltest
 
@@ -3304,7 +3286,7 @@ proc tcltest::threadReap {} {
 	}
 	testthread errorproc ThreadError
 	return [llength [testthread names]]
-    } elseif {[info commands thread::id] != {}} {
+    } elseif {[info commands thread::id] ne {}} {
 	
 	# Thread extension
 
@@ -3336,15 +3318,15 @@ namespace eval tcltest {
     # Set up the constraints in the testConstraints array to be lazily
     # initialized by a registered initializer, or by "false" if no
     # initializer is registered.
-    trace variable testConstraints r [namespace code SafeFetch]
+    trace add variable testConstraints read [namespace code SafeFetch]
 
     # Only initialize constraints at package load time if an
     # [initConstraintsHook] has been pre-defined.  This is only
     # for compatibility support.  The modern way to add a custom
     # test constraint is to just call the [testConstraint] command
     # straight away, without all this "hook" nonsense.
-    if {[string equal [namespace current] \
-	    [namespace qualifiers [namespace which initConstraintsHook]]]} {
+    if {[namespace current] eq
+	    [namespace qualifiers [namespace which initConstraintsHook]]} {
 	InitConstraints
     } else {
 	proc initConstraintsHook {} {}
@@ -3381,15 +3363,15 @@ namespace eval tcltest {
 
     proc LoadTimeCmdLineArgParsingRequired {} {
 	set required false
-	if {[info exists ::argv] && [lsearch -exact $::argv -help] != -1} {
+	if {[info exists ::argv] && ("-help" in $::argv)} {
 	    # The command line asks for -help, so give it (and exit)
 	    # right now.  ([configure] does not process -help)
 	    set required true
 	}
 	foreach hook { PrintUsageInfoHook processCmdLineArgsHook
 			processCmdLineArgsAddFlagsHook } {
-	    if {[string equal [namespace current] [namespace qualifiers \
-		    [namespace which $hook]]]} {
+	    if {[namespace current] eq
+		    [namespace qualifiers [namespace which $hook]]} {
 		set required true
 	    } else {
 		proc $hook args {}
diff --git a/library/tm.tcl b/library/tm.tcl
index ce8a013..d2af4f5 100644
--- a/library/tm.tcl
+++ b/library/tm.tcl
@@ -54,7 +54,7 @@ namespace eval ::tcl::tm {
     # Export the public API
 
     namespace export path
-    namespace ensemble create -command path -subcommand {add remove list}
+    namespace ensemble create -command path -subcommands {add remove list}
 }
 
 # ::tcl::tm::path implementations --
@@ -260,10 +260,8 @@ proc ::tcl::tm::UnknownHandler {original name args} {
 		    # Otherwise we still have to fallback to the regular
 		    # package search to complete the processing.
 
-		    if {
-			($pkgname eq $name) &&
-			[package vsatisfies $pkgversion {*}$args]
-		    } then {
+		    if {($pkgname eq $name)
+			    && [package vsatisfies $pkgversion {*}$args]} {
 			set satisfied 1
 
 			# We do not abort the loop, and keep adding provide
@@ -347,7 +345,7 @@ proc ::tcl::tm::Defaults {} {
 #	Calls 'path add' to paths to the list of module search paths.
 
 proc ::tcl::tm::roots {paths} {
-    foreach {major minor} [split [info tclversion] .] break
+    lassign [split [package present Tcl] .] major minor
     foreach pa $paths {
 	set p [file join $pa tcl$major]
 	for {set n $minor} {$n >= 0} {incr n -1} {
diff --git a/library/word.tcl b/library/word.tcl
index 16a4638..b8f34a5 100644
--- a/library/word.tcl
+++ b/library/word.tcl
@@ -67,7 +67,7 @@ namespace eval ::tcl {
 proc tcl_wordBreakAfter {str start} {
     variable ::tcl::WordBreakRE
     set result {-1 -1}
-    regexp -indices -start $start $WordBreakRE(after) $str result
+    regexp -indices -start $start -- $WordBreakRE(after) $str result
     return [lindex $result 1]
 }
 
@@ -85,7 +85,7 @@ proc tcl_wordBreakAfter {str start} {
 proc tcl_wordBreakBefore {str start} {
     variable ::tcl::WordBreakRE
     set result {-1 -1}
-    regexp -indices $WordBreakRE(before) [string range $str 0 $start] result
+    regexp -indices -- $WordBreakRE(before) [string range $str 0 $start] result
     return [lindex $result 1]
 }
 
@@ -104,7 +104,7 @@ proc tcl_wordBreakBefore {str start} {
 proc tcl_endOfWord {str start} {
     variable ::tcl::WordBreakRE
     set result {-1 -1}
-    regexp -indices -start $start $WordBreakRE(end) $str result
+    regexp -indices -start $start -- $WordBreakRE(end) $str result
     return [lindex $result 1]
 }
 
@@ -122,7 +122,7 @@ proc tcl_endOfWord {str start} {
 proc tcl_startOfNextWord {str start} {
     variable ::tcl::WordBreakRE
     set result {-1 -1}
-    regexp -indices -start $start $WordBreakRE(next) $str result
+    regexp -indices -start $start -- $WordBreakRE(next) $str result
     return [lindex $result 1]
 }
 
@@ -138,7 +138,7 @@ proc tcl_startOfNextWord {str start} {
 proc tcl_startOfPreviousWord {str start} {
     variable ::tcl::WordBreakRE
     set word {-1 -1}
-    regexp -indices $WordBreakRE(previous) [string range $str 0 $start-1] \
+    regexp -indices -- $WordBreakRE(previous) [string range $str 0 $start-1] \
 	    result word
     return [lindex $word 0]
 }
diff --git a/macosx/tclMacOSXFCmd.c b/macosx/tclMacOSXFCmd.c
index f266443..8ecfd0b 100644
--- a/macosx/tclMacOSXFCmd.c
+++ b/macosx/tclMacOSXFCmd.c
@@ -578,7 +578,7 @@ GetOSTypeFromObj(
     int result = TCL_OK;
 
     if (objPtr->typePtr != &tclOSTypeType) {
-	result = tclOSTypeType.setFromAnyProc(interp, objPtr);
+	result = SetOSTypeFromAny(interp, objPtr);
     }
     *osTypePtr = (OSType) objPtr->internalRep.longValue;
     return result;
@@ -608,7 +608,7 @@ NewOSTypeObj(
     Tcl_Obj *objPtr;
 
     TclNewObj(objPtr);
-    Tcl_InvalidateStringRep(objPtr);
+    TclInvalidateStringRep(objPtr);
     objPtr->internalRep.longValue = (long) osType;
     objPtr->typePtr = &tclOSTypeType;
     return objPtr;
diff --git a/tests/assocd.test b/tests/assocd.test
index d1489b3..b543c64 100644
--- a/tests/assocd.test
+++ b/tests/assocd.test
@@ -11,10 +11,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -60,5 +58,5 @@ test assocd-3.3 {testing deleting assoc data} testdelassocdata {
 } {0 {}}
 
 # cleanup
-::tcltest::cleanupTests
+cleanupTests
 return
diff --git a/tests/basic.test b/tests/basic.test
index 7435571..ccf26cc 100644
--- a/tests/basic.test
+++ b/tests/basic.test
@@ -16,7 +16,7 @@
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
 package require tcltest 2
-namespace import -force ::tcltest::*
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -31,7 +31,7 @@ catch {interp delete test_interp}
 catch {rename p ""}
 catch {rename q ""}
 catch {rename cmd ""}
-catch {unset x}
+unset -nocomplain x
 
 test basic-1.1 {Tcl_CreateInterp, creates interp's global namespace} {
     catch {interp delete test_interp}
@@ -302,7 +302,7 @@ test basic-20.1 {Tcl_GetCommandInfo, names for commands created inside namespace
     catch {namespace delete {*}[namespace children :: test_ns_*]}
     catch {rename p ""}
     catch {rename q ""}
-    catch {unset x}
+    unset -nocomplain x
     set x [namespace eval test_ns_basic::test_ns_basic2 {
         # the following creates a cmd in the global namespace
         testcmdtoken create p
@@ -355,7 +355,7 @@ test basic-23.1 {Tcl_DeleteCommand} {emptyTest} {
 
 test basic-24.1 {Tcl_DeleteCommandFromToken, invalidate all compiled code if cmd has compile proc} {
     catch {interp delete test_interp}
-    catch {unset x}
+    unset -nocomplain x
     interp create test_interp
     interp eval test_interp {
         proc useSet {} {
@@ -427,7 +427,7 @@ test basic-26.1 {Tcl_EvalObj: preserve object while evaling it} -setup {
     # string would have been freed, leaving garbage bytes for the error
     # message.
     set f [open $fName w]
-    fileevent $f writable "fileevent $f writable {}; error foo"
+    chan event $f writable "chan event $f writable {}; error foo"
     set x {}
     vwait x
     close $f
@@ -547,8 +547,8 @@ test basic-46.1 {Tcl_AllowExceptions: exception return not allowed} {stdio} {
     catch {close $f}
     set res [catch {
 	set f [open |[list [interpreter]] w+]
-	fconfigure $f -buffering line
-	puts $f {fconfigure stdout -buffering line}
+	chan configure $f -buffering line
+	puts $f {chan configure stdout -buffering line}
 	puts $f continue
 	puts $f {puts $::errorInfo}
 	puts $f {puts DONE}
@@ -972,6 +972,6 @@ catch {rename p ""}
 catch {rename q ""}
 catch {rename cmd ""}
 catch {rename value:at: ""}
-catch {unset x}
-::tcltest::cleanupTests
+unset -nocomplain x
+cleanupTests
 return
diff --git a/tests/cmdInfo.test b/tests/cmdInfo.test
index 69d7171..0a587e8 100644
--- a/tests/cmdInfo.test
+++ b/tests/cmdInfo.test
@@ -13,10 +13,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -101,7 +99,7 @@ test cmdinfo-6.1 {Names for commands created when outside namespaces} \
 # cleanup
 catch {namespace delete cmdInfoNs1::cmdInfoNs2 cmdInfoNs1}
 catch {rename x1 ""}
-::tcltest::cleanupTests
+cleanupTests
 return
 
 # Local Variables:
diff --git a/tests/dcall.test b/tests/dcall.test
index 3df0ac8..41dd777 100644
--- a/tests/dcall.test
+++ b/tests/dcall.test
@@ -11,10 +11,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -41,5 +39,5 @@ test dcall-1.6 {deletion callbacks} testdcall {
 } {}
 
 # cleanup
-::tcltest::cleanupTests
+cleanupTests
 return
diff --git a/tests/expr-old.test b/tests/expr-old.test
index 4f3cb2e..06a00ba 100644
--- a/tests/expr-old.test
+++ b/tests/expr-old.test
@@ -13,10 +13,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2.1
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2.1
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -145,7 +143,7 @@ test expr-old-1.50 {integer operators} {expr +36} 36
 test expr-old-1.51 {integer operators} {expr +--++36} 36
 test expr-old-1.52 {integer operators} {expr +36%+5} 1
 test expr-old-1.53 {integer operators} {
-    catch {unset x}
+    unset -nocomplain x
     set x yes
     list [expr {1 && $x}] [expr {$x && 1}] \
          [expr {0 || $x}] [expr {$x || 0}]
@@ -453,7 +451,7 @@ test expr-old-23.3 {double quotes} {
 test expr-old-23.4 {double quotes} {expr {"11\}\}22"}} 11}}22
 test expr-old-23.5 {double quotes} {expr {"\*bc"}} {*bc}
 test expr-old-23.6 {double quotes} {
-    catch {unset bogus__}
+    unset -nocomplain bogus__
     list [catch {expr {"$bogus__"}} msg] $msg
 } {1 {can't read "bogus__": no such variable}}
 test expr-old-23.7 {double quotes} {
@@ -502,7 +500,7 @@ test expr-old-26.2 {error conditions} -body {
 test expr-old-26.3 {error conditions} -body {
     expr 2+4*(
 } -returnCodes error -match glob -result *
-catch {unset _non_existent_}
+unset -nocomplain _non_existent_
 test expr-old-26.4 {error conditions} {
     list [catch {expr 2+$_non_existent_} msg] $msg
 } {1 {can't read "_non_existent_": no such variable}}
@@ -581,7 +579,7 @@ test expr-old-27.4 {cancelled evaluation} {
     expr {1?2:[set a 2]}
     set a
 } 1
-catch {unset x}
+unset -nocomplain x
 test expr-old-27.5 {cancelled evaluation} {
     list [catch {expr {[info exists x] && $x}} msg] $msg
 } {0 0}
diff --git a/tests/http.test b/tests/http.test
index 9861e0e..e2de7d8 100644
--- a/tests/http.test
+++ b/tests/http.test
@@ -547,11 +547,10 @@ test http-4.14 {http::Event} -body {
 	error "bogus return from http::geturl"
     }
     http::wait $token
-    http::status $token
-    # error code varies among platforms.
-} -returnCodes 1 -match regexp -cleanup {
+    lindex [http::error $token] 0
+} -cleanup {
     catch {http::cleanup $token}
-} -result {(connect failed|couldn't open socket)}
+} -result {connect failed connection refused}
 # Bogus host
 test http-4.15 {http::Event} -body {
     # This test may fail if you use a proxy server. That is to be
diff --git a/tests/main.test b/tests/main.test
index f1dc7fd..351fd4f 100644
--- a/tests/main.test
+++ b/tests/main.test
@@ -129,7 +129,7 @@ namespace eval ::tcl::test::main {
 	set script [makeFile {} script]
 	file delete $script
 	set f [open $script w]
-	fconfigure $f -encoding utf-8
+	chan configure $f -encoding utf-8
 	puts $f {puts [list $argv0 $argv $tcl_interactive]}
 	puts -nonewline $f {puts [string equal \u20ac }
 	puts $f "\u20ac]"
@@ -150,7 +150,7 @@ namespace eval ::tcl::test::main {
 	set script [makeFile {} script]
 	file delete $script
 	set f [open $script w]
-	fconfigure $f -encoding utf-8
+	chan configure $f -encoding utf-8
 	puts $f {puts [list $argv0 $argv $tcl_interactive]}
 	puts -nonewline $f {puts [string equal \u20ac }
 	puts $f "\u20ac]"
@@ -171,7 +171,7 @@ namespace eval ::tcl::test::main {
 	set script [makeFile {} script]
 	file delete $script
 	set f [open $script w]
-	fconfigure $f -encoding utf-8
+	chan configure $f -encoding utf-8
 	puts $f {puts [list $argv0 $argv $tcl_interactive]}
 	puts -nonewline $f {puts [string equal \u20ac }
 	puts $f "\u20ac]"
@@ -592,7 +592,7 @@ namespace eval ::tcl::test::main {
 	catch {set f [open "|[list [interpreter]]" w+]}
     } -body {
 	type $f {
-	    fconfigure stdin -blocking 0
+	    chan configure stdin -blocking 0
 	    puts SUCCESS
 	}
 	list [catch {gets $f} line] $line
@@ -606,19 +606,19 @@ namespace eval ::tcl::test::main {
 	exec
     } -setup {
 	catch {set f [open "|[list [interpreter]]" w+]}
-	catch {fconfigure $f -blocking 0}
+	catch {chan configure $f -blocking 0}
     } -body {
-	type $f "fconfigure stdin -eofchar \\032
+	type $f "chan configure stdin -eofchar \\032
 	    if 1 \{\n\032"
 	variable wait
-	fileevent $f readable \
+	chan event $f readable \
 		[list set [namespace which -variable wait] "child exit"]
 	set id [after 2000 [list set [namespace which -variable wait] timeout]]
 	vwait [namespace which -variable wait]
 	after cancel $id
 	set wait
     } -cleanup {
-	if {[string equal timeout $wait] && [testConstraint unix]} {
+	if {$wait eq "timeout" && [testConstraint unix]} {
 	    exec kill [pid $f]
 	}
 	close $f
@@ -631,17 +631,17 @@ namespace eval ::tcl::test::main {
     } -setup {
 	set cmd {makeFile "if 1 \{" script}
 	catch {set f [open "|[list [interpreter]] < [list [eval $cmd]]" r]}
-	catch {fconfigure $f -blocking 0}
+	catch {chan configure $f -blocking 0}
     } -body {
 	variable wait
-	fileevent $f readable \
+	chan event $f readable \
 		[list set [namespace which -variable wait] "child exit"]
 	set id [after 2000 [list set [namespace which -variable wait] timeout]]
 	vwait [namespace which -variable wait]
 	after cancel $id
 	set wait
     } -cleanup {
-	if {[string equal timeout $wait] && [testConstraint unix]} {
+	if {$wait eq "timeout" && [testConstraint unix]} {
 	    exec kill [pid $f]
 	}
 	close $f
@@ -748,7 +748,7 @@ namespace eval ::tcl::test::main {
 	exec Tcltest
     } -setup {
 	catch {set f [open "|[list [interpreter]]" w+]}
-	catch {fconfigure $f -blocking 0}
+	catch {chan configure $f -blocking 0}
     } -body {
 	type $f "testsetmainloop
 	         after 2000 testexitmainloop
@@ -983,7 +983,7 @@ namespace eval ::tcl::test::main {
     } -body {
 	exec [interpreter] << {
 		testsetmainloop
-		fconfigure stdin -blocking 0
+		chan configure stdin -blocking 0
 		testexitmainloop
 	} >& result
 	set f [open result]
diff --git a/tests/msgcat.test b/tests/msgcat.test
index 1522354..70a7af2 100644
--- a/tests/msgcat.test
+++ b/tests/msgcat.test
@@ -12,7 +12,7 @@
 # Note that after running these tests, entries will be left behind in the
 # message catalogs for locales foo, foo_BAR, and foo_BAR_baz.
 
-package require Tcl 8.2
+package require Tcl 8.5
 if {[catch {package require tcltest 2}]} {
     puts stderr "Skipping tests in [info script].  tcltest 2 required."
     return
@@ -56,7 +56,7 @@ namespace eval ::msgcat::test {
 		set result [string tolower \
 			[msgcat::ConvertLocale $::tcl::mac::locale]]
 	    } else {
-		if {([info sharedlibextension] == ".dll")
+		if {([info sharedlibextension] eq ".dll")
 			&& ![catch {package require registry}]} {
 		    # Windows and Cygwin have other ways to determine the
 		    # locale when the environment variables are missing
@@ -72,7 +72,7 @@ namespace eval ::msgcat::test {
 	    variable var
 	    foreach var $envVars {
 		catch {variable $var $::env($var)}
-		catch {unset ::env($var)}
+		unset -nocomplain ::env($var)
 	    }
 	    foreach var $setVars {
 		set ::env($var) $var
@@ -84,13 +84,13 @@ namespace eval ::msgcat::test {
 	} -cleanup {
 	    interp delete [namespace current]::i
 	    foreach var $envVars {
-		catch {unset ::env($var)}
+		unset -nocomplain ::env($var)
 		catch {set ::env($var) [set [namespace current]::$var]}
 	    }
 	} -body {i eval msgcat::mclocale} -result $result
 	incr count
     }
-    catch {unset result}
+    unset -nocomplain result
     
     # Could add tests of initialization from Windows registry here.
     # Use a fake registry package.
@@ -324,7 +324,7 @@ namespace eval ::msgcat::test {
 	    incr count
 	}
     }
-    catch {unset result}
+    unset -nocomplain result
 
     # Tests msgcat-4.*: [mcunknown]
 
diff --git a/tests/oo.test b/tests/oo.test
index 5d34077..49fe150 100644
--- a/tests/oo.test
+++ b/tests/oo.test
@@ -2204,6 +2204,25 @@ test oo-19.2 {OO: varname method: Bug 2883857} -setup {
 } -cleanup {
     SpecialClass destroy
 } -result ::oo_test::x(y)
+test oo-19.3 {OO: varname method and variable decl: Bug 3603695} -setup {
+    oo::class create testClass {
+	variable foo
+	export varname
+	constructor {} {
+	    variable foo x
+	}
+	method bar {obj} {
+	    my varname foo
+	    $obj varname foo
+	}
+    }
+} -body {
+    testClass create A
+    testClass create B
+    lsearch [list [A varname foo] [B varname foo]] [B bar A]
+} -cleanup {
+    testClass destroy
+} -result 0
 
 test oo-20.1 {OO: variable method} -body {
     oo::class create testClass {
diff --git a/tests/parse.test b/tests/parse.test
index bc4107d..b9cfe80 100644
--- a/tests/parse.test
+++ b/tests/parse.test
@@ -439,7 +439,7 @@ test parse-8.12 {Tcl_EvalObjv procedure, TCL_EVAL_INVOKE} {
 
 
 test parse-9.1 {Tcl_LogCommandInfo, line numbers} testevalex {
-    catch {unset x}
+    unset -nocomplain x
     list [catch {testevalex {for {} 1 {} {
 
 
@@ -480,7 +480,7 @@ test parse-10.3 {Tcl_EvalTokens, nested commands} testevalex {
     testevalex {concat [expr 2 + 6]}
 } {8}
 test parse-10.4 {Tcl_EvalTokens, nested commands} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     list [catch {testevalex {concat xxx[expr $a]}} msg] $msg
 } {1 {can't read "a": no such variable}}
 test parse-10.5 {Tcl_EvalTokens, simple variables} testevalex {
@@ -488,21 +488,21 @@ test parse-10.5 {Tcl_EvalTokens, simple variables} testevalex {
     testevalex {concat $a}
 } {hello}
 test parse-10.6 {Tcl_EvalTokens, array variables} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     set a(12) 46
     testevalex {concat $a(12)}
 } {46}
 test parse-10.7 {Tcl_EvalTokens, array variables} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     set a(12) 46
     testevalex {concat $a(1[expr 3 - 1])}
 } {46}
 test parse-10.8 {Tcl_EvalTokens, array variables} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     list [catch {testevalex {concat $x($a)}} msg] $msg
 } {1 {can't read "a": no such variable}}
 test parse-10.9 {Tcl_EvalTokens, array variables} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     list [catch {testevalex {concat xyz$a(1)}} msg] $msg
 } {1 {can't read "a(1)": no such variable}}
 test parse-10.10 {Tcl_EvalTokens, object values} testevalex {
@@ -542,11 +542,11 @@ test parse-11.2 {Tcl_EvalEx, error while parsing} testevalex {
     list [catch {testevalex {concat "abc}} msg] $msg
 } {1 {missing "}}
 test parse-11.3 {Tcl_EvalEx, error while collecting words} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     list [catch {testevalex {concat xyz $a}} msg] $msg
 } {1 {can't read "a": no such variable}}
 test parse-11.4 {Tcl_EvalEx, error in Tcl_EvalObjv call} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     list [catch {testevalex {_bogus_ a b c d}} msg] $msg
 } {1 {invalid command name "_bogus_"}}
 test parse-11.5 {Tcl_EvalEx, exceptional return} testevalex {
@@ -565,7 +565,7 @@ test parse-11.8 {Tcl_EvalEx, multiple commands in script} testevalex {
     }] $a $c
 } {d b d}
 test parse-11.9 {Tcl_EvalEx, freeing memory after error} testevalex {
-    catch {unset a}
+    unset -nocomplain a
     list [catch {testevalex {concat a b c d e f g h i j k l m n o p q r s t u v w x y z $a}} msg] $msg
 } {1 {can't read "a": no such variable}}
 test parse-11.10 {Tcl_EvalTokens, empty commands} testevalex {
@@ -671,11 +671,11 @@ test parse-13.3 {Tcl_ParseVar procedure, no variable name} testparsevar {
     testparsevar {$.123}
 } {{$} .123}
 test parse-13.4 {Tcl_ParseVar procedure, error looking up variable} testparsevar {
-    catch {unset abc}
+    unset -nocomplain abc
     list [catch {testparsevar {$abc}} msg] $msg
 } {1 {can't read "abc": no such variable}}
 test parse-13.5 {Tcl_ParseVar procedure, error looking up variable} testparsevar {
-    catch {unset abc}
+    unset -nocomplain abc
     list [catch {testparsevar {$abc([bogus x y z])}} msg] $msg
 } {1 {invalid command name "bogus"}}
 
@@ -1092,13 +1092,12 @@ test parse-20.12 {TclParseBackslash: truncated escape} testparser {
 } {- {\x12X} 1 word {\x12X} 2 backslash {\x12} 0 text X 0 {}}
 
 test parse-21.0 {Bug 1884496} testevent {
-    set ::script {set a [p]; return -level 0 $a}
+    set ::script {testevent delete a; set a [p]; set ::done $a}
     proc ::p {} {string first s $::script}
     testevent queue a head $::script
-    update
+    vwait done
 } {}
 
-
 cleanupTests
 }
 
diff --git a/tests/parseExpr.test b/tests/parseExpr.test
index 7910974..714c45b 100644
--- a/tests/parseExpr.test
+++ b/tests/parseExpr.test
@@ -8,10 +8,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -1067,5 +1065,5 @@ test parseExpr-22.18 {Bug 3401704} -constraints testexprparser -body {
 
 
 # cleanup
-::tcltest::cleanupTests
+cleanupTests
 return
diff --git a/tests/parseOld.test b/tests/parseOld.test
index 0edcbf0..f3b1591 100644
--- a/tests/parseOld.test
+++ b/tests/parseOld.test
@@ -13,10 +13,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -166,25 +164,25 @@ test parseOld-5.6 {variable substitution} {
     set msg
 } {can't read "_non_existent_": no such variable}
 test parseOld-5.7 {array variable substitution} {
-    catch {unset a}
+    unset -nocomplain a
     set a(xyz) 123
     set b $a(xyz)foo
     set b
 } 123foo
 test parseOld-5.8 {array variable substitution} {
-    catch {unset a}
+    unset -nocomplain a
     set "a(x y z)" 123
     set b $a(x y z)foo
     set b
 } 123foo
 test parseOld-5.9 {array variable substitution} {
-    catch {unset a}; catch {unset qqq}
+    unset -nocomplain a qqq
     set "a(x y z)" qqq
     set $a([format x]\ y [format z]) foo
     set qqq
 } foo
 test parseOld-5.10 {array variable substitution} {
-    catch {unset a}
+    unset -nocomplain a
     list [catch {set b $a(22)} msg] $msg
 } {1 {can't read "a(22)": no such variable}}
 test parseOld-5.11 {array variable substitution} {
@@ -194,9 +192,9 @@ test parseOld-5.11 {array variable substitution} {
 test parseOld-5.12 {empty array name support} {
     list [catch {set b a$()} msg] $msg
 } {1 {can't read "()": no such variable}}
-catch {unset a}
+unset -nocomplain a
 test parseOld-5.13 {array variable substitution} {
-    catch {unset a}
+    unset -nocomplain a
     set long {This is a very long variable, long enough to cause storage \
 	allocation to occur in Tcl_ParseVar.  If that storage isn't getting \
 	freed up correctly, then a core leak will occur when this test is \
@@ -211,13 +209,13 @@ test parseOld-5.13 {array variable substitution} {
 	run.  This text is probably beginning to sound like drivel, but I've \
 	run out of things to say and I need more characters still.}}}
 test parseOld-5.14 {array variable substitution} {
-    catch {unset a}; catch {unset b}; catch {unset a1}
+    unset -nocomplain a b a1
     set a1(22) foo
     set a(foo) bar
     set b $a($a1(22))
     set b
 } bar
-catch {unset a}; catch {unset a1}
+unset -nocomplain a a1
 
 test parseOld-7.1 {backslash substitution} {
     set a "\a\c\n\]\}"
diff --git a/tests/pkgMkIndex.test b/tests/pkgMkIndex.test
index 0fe394e..84c82ce 100644
--- a/tests/pkgMkIndex.test
+++ b/tests/pkgMkIndex.test
@@ -8,10 +8,8 @@
 # Copyright (c) 1998-1999 by Scriptics Corporation.
 # All rights reserved.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
 set fullPkgPath [makeDirectory pkg]
 
@@ -45,7 +43,7 @@ proc pkgtest::parseArgs { args } {
 	set a [lindex $args $iarg]
 	if {[regexp {^-} $a]} {
 	    lappend options $a
-	    if {[string compare -load $a] == 0} {
+	    if {$a eq "-load"} {
 		incr iarg
 		lappend options [lindex $args $iarg]
 	    }
@@ -81,7 +79,7 @@ proc pkgtest::parseIndex { filePath } {
 	$slave eval {
 	    rename package package_original
 	    proc package { args } {
-		if {[string compare [lindex $args 0] ifneeded] == 0} {
+		if {[lindex $args 0] eq "ifneeded"} {
 		    set pkg [lindex $args 1]
 		    set ver [lindex $args 2]
 		    set ::PKGS($pkg:$ver) [lindex $args 3]
@@ -111,9 +109,9 @@ proc pkgtest::parseIndex { filePath } {
 	foreach k [lsort [array names P]] {
 	    lappend PKGS $k $P($k)
 	}
-    } err]} {
-	set ei $::errorInfo
-	set ec $::errorCode
+    } err opts]} {
+	set ei [dict get $opts -errorinfo]
+	set ec [dict get $opts -errorcode]
 
 	catch {interp delete $slave}
 
diff --git a/tests/platform.test b/tests/platform.test
index aab7c78..6596975 100644
--- a/tests/platform.test
+++ b/tests/platform.test
@@ -9,10 +9,14 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+
+namespace eval ::tcl::test::platform {
+    namespace import ::tcltest::testConstraint
+    namespace import ::tcltest::test
+    namespace import ::tcltest::cleanupTests
+
+    variable ::tcl_platform
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -54,7 +58,10 @@ test platform-3.1 {CPU ID on Windows/UNIX} \
     -result {^(?:AuthenticAMD|CentaurHauls|CyrixInstead|GenuineIntel)$}
 
 # cleanup
-::tcltest::cleanupTests
+cleanupTests
+
+}
+namespace delete ::tcl::test::platform
 return
 
 # Local Variables:
diff --git a/tests/reg.test b/tests/reg.test
index a0ea850..559f549 100644
--- a/tests/reg.test
+++ b/tests/reg.test
@@ -1080,6 +1080,81 @@ test reg-33.13 {Bug 1810264 - infinite loop} {
 test reg-33.14 {Bug 1810264 - super-expensive expression} nonPortable {
     regexp {(x{200}){200}$y} {x}
 } 0
+test reg-33.15 {Bug 3603557 - an "in the wild" RE} {
+    lindex [regexp -expanded -about {
+	^TETRA_MODE_CMD				# Message Type
+	([[:blank:]]+)				# Pad
+	(ETS_1_1|ETS_1_2|ETS_2_2)		# SystemCode
+	([[:blank:]]+)				# Pad
+	(CONTINUOUS|CARRIER|MCCH|TRAFFIC)	# SharingMode
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,2})			# ColourCode
+	([[:blank:]]+)				# Pad
+	(1|2|3|4|6|9|12|18)			# TSReservedFrames
+	([[:blank:]]+)				# Pad
+	(PASS|TRUE|FAIL|FALSE)			# UPlaneDTX
+	([[:blank:]]+)				# Pad
+	(PASS|TRUE|FAIL|FALSE)			# Frame18Extension
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,4})			# MCC
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,5})			# MNC
+	([[:blank:]]+)				# Pad
+	(BOTH|BCAST|ENQRY|NONE)			# NbrCellBcast
+	([[:blank:]]+)				# Pad
+	(UNKNOWN|LOW|MEDIUM|HIGH)		# CellServiceLevel
+	([[:blank:]]+)				# Pad
+	(PASS|TRUE|FAIL|FALSE)			# LateEntryInfo
+	([[:blank:]]+)				# Pad
+	(300|400)				# FrequencyBand
+	([[:blank:]]+)				# Pad
+	(NORMAL|REVERSE)			# ReverseOperation
+	([[:blank:]]+)				# Pad
+	(NONE|\+6\.25|\-6\.25|\+12\.5)		# Offset
+	([[:blank:]]+)				# Pad
+	(10)					# DuplexSpacing
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,4})			# MainCarrierNr
+	([[:blank:]]+)				# Pad
+	(0|1|2|3)				# NrCSCCH
+	([[:blank:]]+)				# Pad
+	(15|20|25|30|35|40|45)			# MSTxPwrMax
+	([[:blank:]]+)				# Pad
+	(\-125|\-120|\-115|\-110|\-105|\-100|\-95|\-90|\-85|\-80|\-75|\-70|\-65|\-60|\-55|\-50)
+						# RxLevAccessMin
+	([[:blank:]]+)				# Pad
+	(\-53|\-51|\-49|\-47|\-45|\-43|\-41|\-39|\-37|\-35|\-33|\-31|\-29|\-27|\-25|\-23)
+						# AccessParameter
+	([[:blank:]]+)				# Pad
+	(DISABLE|[[:digit:]]{3,4})		# RadioDLTimeout
+	([[:blank:]]+)				# Pad
+	(\-[[:digit:]]{2,3})			# RSSIThreshold
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,5})			# CCKIdSCKVerNr
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,5})			# LocationArea
+	([[:blank:]]+)				# Pad
+	([(1|0)]{16})				# SubscriberClass
+	([[:blank:]]+)				# Pad
+	([(1|0)]{12})				# BSServiceDetails
+	([[:blank:]]+)				# Pad
+	(RANDOMIZE|IMMEDIATE|[[:digit:]]{1,2})	# IMM
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,2})			# WT
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,2})			# Nu
+	([[:blank:]]+)				# Pad
+	([0-1])					# FrameLngFctr
+	([[:blank:]]+)				# Pad
+	([[:digit:]]{1,2})			# TSPtr
+	([[:blank:]]+)				# Pad
+	([0-7])					# MinPriority
+	([[:blank:]]+)				# Pad
+	(PASS|TRUE|FAIL|FALSE)			# ExtdSrvcsEnabled
+	([[:blank:]]+)				# Pad
+	(.*)					# ConditionalFields
+    }] 0
+} 68
 
 # cleanup
 ::tcltest::cleanupTests
diff --git a/tests/result.test b/tests/result.test
index 3391ce1..9e8a66b 100644
--- a/tests/result.test
+++ b/tests/result.test
@@ -10,10 +10,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
diff --git a/tests/set.test b/tests/set.test
index 1d88553..18119f5 100644
--- a/tests/set.test
+++ b/tests/set.test
@@ -524,6 +524,11 @@ test set-5.1 {error on malformed array name} testset2 {
     list $msg $msg1
 } {{can't read "z(a)(b)": variable isn't array} {can't read "z(b)(a)": variable isn't array}}
 
+# In a mem-debug build, this test will crash unless Bug 3602706 is fixed.
+test set-5.2 {Bug 3602706} -body {
+    testset2 ::tcl_platform not-in-there
+} -returnCodes error -result * -match glob
+
 # cleanup
 catch {unset a}
 catch {unset b}
diff --git a/tests/stack.test b/tests/stack.test
index 873cb08..13bc524 100644
--- a/tests/stack.test
+++ b/tests/stack.test
@@ -9,10 +9,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest 2
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
 # Note that a failure in this test may result in a crash of the executable.
 
diff --git a/tests/tcltest.test b/tests/tcltest.test
index 86aca6f..ce8d617 100755
--- a/tests/tcltest.test
+++ b/tests/tcltest.test
@@ -80,10 +80,7 @@ proc slave {msgVar args} {
 
     # Need to capture output in msg
 
-    set code [catch {i eval {source $argv0}} foo]
-if $code {
-#puts "$code: $foo\n$::errorInfo"
-}
+    set code [catch {i eval {source $argv0}}]
     i eval {close $tcltest::outputChannel}
     interp delete [namespace current]::i
     set f [open $of]
@@ -99,8 +96,6 @@ if $code {
 	append msg \n$err
     }
     return $code
-
-#    return [catch {uplevel 1 [linsert $args 0  exec [interpreter]]} msg]
 }
 test tcltest-2.0 {tcltest (verbose default - 'b')} {unixOrPc} {
     set result [slave msg test.tcl]
@@ -549,7 +544,7 @@ set notWriteableDir [file join [temporaryDirectory] notwriteable]
 makeDirectory notreadable
 makeDirectory notwriteable
 switch -- $::tcl_platform(platform) {
-    "unix" {
+    unix {
 	file attributes $notReadableDir -permissions 00333
 	file attributes $notWriteableDir -permissions 00555
     }
@@ -716,8 +711,8 @@ test tcltest-8.60 {::workingDirectory}  {
 
 # clean up from directory testing
 
-switch $::tcl_platform(platform) {
-    "unix" {
+switch -- $::tcl_platform(platform) {
+    unix {
 	file attributes $notReadableDir -permissions 777
 	file attributes $notWriteableDir -permissions 777
     }
@@ -727,7 +722,7 @@ switch $::tcl_platform(platform) {
     }
 }
 
-file delete -force $notReadableDir $notWriteableDir
+file delete -force -- $notReadableDir $notWriteableDir
 removeFile a.tcl
 removeFile thisdirectoryisafile
 removeDirectory normaldirectory
@@ -1150,7 +1145,7 @@ test tcltest-19.1 {TCLTEST_OPTIONS default} -setup {
     } -cleanup {
 	interp delete slave2
 	interp delete slave1
-	if {$oldoptions == "none"} {
+	if {$oldoptions eq "none"} {
 	    unset ::env(TCLTEST_OPTIONS) 
 	} else {
 	    set ::env(TCLTEST_OPTIONS) $oldoptions
diff --git a/tests/thread.test b/tests/thread.test
index d79f693..f32ef61 100644
--- a/tests/thread.test
+++ b/tests/thread.test
@@ -84,28 +84,6 @@ if {[testConstraint testthread]} {
     }
 
     testthread errorproc ThreadError
-
-    set mainThread [testthread id]
-
-    proc ThreadNullError {id info} {
-	# ignore
-    }
-
-    proc threadReap {} {
-	testthread errorproc ThreadNullError
-	while {[llength [testthread names]] > 1} {
-	    foreach tid [testthread names] {
-		if {$tid != [testthread id]} {
-		    catch {
-			testthread send -async $tid {testthread exit}
-		    }
-		}
-	    }
-	    after 1
-	}
-	testthread errorproc ThreadError
-	return [llength [testthread names]]
-    }
 }
 
 # Some tests require manual draining of the event queue
diff --git a/tests/tm.test b/tests/tm.test
index 149a65d..1b22f8c 100644
--- a/tests/tm.test
+++ b/tests/tm.test
@@ -200,7 +200,7 @@ test tm-3.11 {tm: module path management, remove ignores unknown path} -setup {
 proc genpaths {base} {
     # Normalizing picks up drive letters on windows [Bug 1053568]
     set base [file normalize $base]
-    foreach {major minor} [split [info tclversion] .] break
+    lassign [split [package present Tcl] .] major minor 
     set results {}
     set base [file join $base tcl$major]
     lappend results [file join $base site-tcl]
diff --git a/tests/trace.test b/tests/trace.test
index 0f48dcf..b4957c0 100644
--- a/tests/trace.test
+++ b/tests/trace.test
@@ -11,10 +11,8 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest
+namespace import ::tcltest::*
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
@@ -32,15 +30,15 @@ proc getbytes {} {
 
 proc traceScalar {name1 name2 op} {
     global info
-    set info [list $name1 $name2 $op [catch {uplevel set $name1} msg] $msg]
+    set info [list $name1 $name2 $op [catch {uplevel 1 set $name1} msg] $msg]
 }
 proc traceScalarAppend {name1 name2 op} {
     global info
-    lappend info $name1 $name2 $op [catch {uplevel set $name1} msg] $msg
+    lappend info $name1 $name2 $op [catch {uplevel 1 set $name1} msg] $msg
 }
 proc traceArray {name1 name2 op} {
     global info
-    set info [list $name1 $name2 $op [catch {uplevel set [set name1]($name2)} msg] $msg]
+    set info [list $name1 $name2 $op [catch {uplevel 1 set [set name1]($name2)} msg] $msg]
 }
 proc traceArray2 {name1 name2 op} {
     global info
@@ -62,7 +60,7 @@ proc traceCheck {cmd args} {
     set info [list [catch $cmd msg] $msg]
 }
 proc traceCrtElement {value name1 name2 op} {
-    uplevel set ${name1}($name2) $value
+    uplevel 1 set ${name1}($name2) $value
 }
 proc traceCommand {oldName newName op} {
     global info
@@ -72,10 +70,10 @@ proc traceCommand {oldName newName op} {
 test trace-0.0 {memory corruption in trace (Tcl Bug 484339)} {
     # You may need Purify or Electric Fence to reliably
     # see this one fail.
-    catch {unset z}
+    unset -nocomplain z
     trace add variable z array {set z(foo) 1 ;#}
     set res "names: [array names z]"
-    catch {unset ::z}
+    unset -nocomplain ::z
     trace variable ::z w {unset ::z; error "memory corruption";#}
     list [catch {set ::z 1} msg] $msg
 } {1 {can't set "::z": memory corruption}}
@@ -83,40 +81,40 @@ test trace-0.0 {memory corruption in trace (Tcl Bug 484339)} {
 # Read-tracing on variables
 
 test trace-1.1 {trace variable reads} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x read traceScalar
     list [catch {set x} msg] $msg $info
 } {1 {can't read "x": no such variable} {x {} read 1 {can't read "x": no such variable}}}
 test trace-1.2 {trace variable reads} {
-    catch {unset x}
+    unset -nocomplain x
     set x 123
     set info {}
     trace add variable x read traceScalar
     list [catch {set x} msg] $msg $info
 } {0 123 {x {} read 0 123}}
 test trace-1.3 {trace variable reads} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x read traceScalar
     set x 123
     set info
 } {}
 test trace-1.4 {trace array element reads} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x(2) read traceArray
     list [catch {set x(2)} msg] $msg $info
 } {1 {can't read "x(2)": no such element in array} {x 2 read 1 {can't read "x(2)": no such element in array}}}
 test trace-1.5 {trace array element reads} {
-    catch {unset x}
+    unset -nocomplain x
     set x(2) zzz
     set info {}
     trace add variable x(2) read traceArray
     list [catch {set x(2)} msg] $msg $info
 } {0 zzz {x 2 read 0 zzz}}
 test trace-1.6 {trace array element reads} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x read traceArray2
     proc p {} {
@@ -127,7 +125,7 @@ test trace-1.6 {trace array element reads} {
     list [catch {p} msg] $msg $info
 } {0 willi {x 2 read}}
 test trace-1.7 {trace array element reads, create element undefined if nonexistant} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x read q
     proc q {name1 name2 op} {
@@ -144,20 +142,20 @@ test trace-1.7 {trace array element reads, create element undefined if nonexista
     list [catch {p} msg] $msg $info
 } {0 wolf {x Y read}}
 test trace-1.8 {trace reads on whole arrays} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x read traceArray
     list [catch {set x(2)} msg] $msg $info
 } {1 {can't read "x(2)": no such variable} {}}
 test trace-1.9 {trace reads on whole arrays} {
-    catch {unset x}
+    unset -nocomplain x
     set x(2) zzz
     set info {}
     trace add variable x read traceArray
     list [catch {set x(2)} msg] $msg $info
 } {0 zzz {x 2 read 0 zzz}}
 test trace-1.10 {trace variable reads} {
-    catch {unset x}
+    unset -nocomplain x
     set x 444
     set info {}
     trace add variable x read traceScalar
@@ -165,28 +163,28 @@ test trace-1.10 {trace variable reads} {
     set info
 } {}
 test trace-1.11 {read traces that modify the array structure} {
-    catch {unset x}
+    unset -nocomplain x
     set x(bar) 0 
     trace variable x r {set x(foo) 1 ;#} 
     trace variable x r {unset -nocomplain x(bar) ;#} 
     array get x
 } {}
 test trace-1.12 {read traces that modify the array structure} {
-    catch {unset x}
+    unset -nocomplain x
     set x(bar) 0 
     trace variable x r {unset -nocomplain x(bar) ;#} 
     trace variable x r {set x(foo) 1 ;#} 
     array get x
 } {}
 test trace-1.13 {read traces that modify the array structure} {
-    catch {unset x}
+    unset -nocomplain x
     set x(bar) 0 
     trace variable x r {set x(foo) 1 ;#} 
     trace variable x r {unset -nocomplain x;#} 
     list [catch {array get x} res] $res
 } {1 {can't read "x(bar)": no such variable}}
 test trace-1.14 {read traces that modify the array structure} {
-    catch {unset x}
+    unset -nocomplain x
     set x(bar) 0 
     trace variable x r {unset -nocomplain x;#} 
     trace variable x r {set x(foo) 1 ;#} 
@@ -196,28 +194,28 @@ test trace-1.14 {read traces that modify the array structure} {
 # Basic write-tracing on variables
 
 test trace-2.1 {trace variable writes} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write traceScalar
     set x 123
     set info
 } {x {} write 0 123}
 test trace-2.2 {trace writes to array elements} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x(33) write traceArray
     set x(33) 444
     set info
 } {x 33 write 0 444}
 test trace-2.3 {trace writes on whole arrays} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write traceArray
     set x(abc) qq
     set info
 } {x abc write 0 qq}
 test trace-2.4 {trace variable writes} {
-    catch {unset x}
+    unset -nocomplain x
     set x 1234
     set info {}
     trace add variable x write traceScalar
@@ -225,7 +223,7 @@ test trace-2.4 {trace variable writes} {
     set info
 } {}
 test trace-2.5 {trace variable writes} {
-    catch {unset x}
+    unset -nocomplain x
     set x 1234
     set info {}
     trace add variable x write traceScalar
@@ -238,7 +236,7 @@ test trace-2.6 {trace variable writes on compiled local} {
     # arrays [Bug 1770591]. The corresponding function for read traces is
     # already indirectly tested in trace-1.7
     #
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     proc p {} {
 	trace add variable x write traceArray
@@ -267,7 +265,7 @@ test trace-2.7 {trace variable writes on errorInfo} -body {
 # trace: after appending all arguments to the list.
 
 test trace-3.1 {trace variable read-modify-writes} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x read traceScalarAppend
     append x 123
@@ -276,7 +274,7 @@ test trace-3.1 {trace variable read-modify-writes} {
     set info
 } {x {} read 0 123456}
 test trace-3.2 {trace variable read-modify-writes} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x {read write} traceScalarAppend
     append x 123
@@ -287,14 +285,14 @@ test trace-3.2 {trace variable read-modify-writes} {
 # Basic unset-tracing on variables
 
 test trace-4.1 {trace variable unsets} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x unset traceScalar
-    catch {unset x}
+    unset -nocomplain x
     set info
 } {x {} unset 1 {can't read "x": no such variable}}
 test trace-4.2 {variable mustn't exist during unset trace} {
-    catch {unset x}
+    unset -nocomplain x
     set x 1234
     set info {}
     trace add variable x unset traceScalar
@@ -302,7 +300,7 @@ test trace-4.2 {variable mustn't exist during unset trace} {
     set info
 } {x {} unset 1 {can't read "x": no such variable}}
 test trace-4.3 {unset traces mustn't be called during reads and writes} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x unset traceScalar
     set x 44
@@ -310,15 +308,15 @@ test trace-4.3 {unset traces mustn't be called during reads and writes} {
     set info
 } {}
 test trace-4.4 {trace unsets on array elements} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 18
     set info {}
     trace add variable x(1) unset traceArray
-    catch {unset x(1)}
+    unset -nocomplain x(1)
     set info
 } {x 1 unset 1 {can't read "x(1)": no such element in array}}
 test trace-4.5 {trace unsets on array elements} {
-    catch {unset x}
+    unset -nocomplain x
     set x(1) 18
     set info {}
     trace add variable x(1) unset traceArray
@@ -326,7 +324,7 @@ test trace-4.5 {trace unsets on array elements} {
     set info
 } {x 1 unset 1 {can't read "x(1)": no such element in array}}
 test trace-4.6 {trace unsets on array elements} {
-    catch {unset x}
+    unset -nocomplain x
     set x(1) 18
     set info {}
     trace add variable x(1) unset traceArray
@@ -334,15 +332,15 @@ test trace-4.6 {trace unsets on array elements} {
     set info
 } {x 1 unset 1 {can't read "x(1)": no such variable}}
 test trace-4.7 {trace unsets on whole arrays} {
-    catch {unset x}
+    unset -nocomplain x
     set x(1) 18
     set info {}
     trace add variable x unset traceProc
-    catch {unset x(0)}
+    unset -nocomplain x(0)
     set info
 } {}
 test trace-4.8 {trace unsets on whole arrays} {
-    catch {unset x}
+    unset -nocomplain x
     set x(1) 18
     set x(2) 144
     set x(3) 14
@@ -352,7 +350,7 @@ test trace-4.8 {trace unsets on whole arrays} {
     set info
 } {x 1 unset}
 test trace-4.9 {trace unsets on whole arrays} {
-    catch {unset x}
+    unset -nocomplain x
     set x(1) 18
     set x(2) 144
     set x(3) 14
@@ -364,7 +362,7 @@ test trace-4.9 {trace unsets on whole arrays} {
 
 # Array tracing on variables
 test trace-5.1 {array traces fire on accesses via [array]} {
-    catch {unset x}
+    unset -nocomplain x
     set x(b) 2
     trace add variable x array traceArray2
     set ::info {}
@@ -372,7 +370,7 @@ test trace-5.1 {array traces fire on accesses via [array]} {
     set ::info
 } {x {} array}
 test trace-5.2 {array traces do not fire on normal accesses} {
-    catch {unset x}
+    unset -nocomplain x
     set x(b) 2
     trace add variable x array traceArray2
     set ::info {}
@@ -381,7 +379,7 @@ test trace-5.2 {array traces do not fire on normal accesses} {
     set ::info
 } {}
 test trace-5.3 {array traces do not outlive variable} {
-    catch {unset x}
+    unset -nocomplain x
     trace add variable x array traceArray2
     set ::info {}
     set x(a) 1
@@ -390,19 +388,19 @@ test trace-5.3 {array traces do not outlive variable} {
     set ::info
 } {}
 test trace-5.4 {array traces properly listed in trace information} {
-    catch {unset x}
+    unset -nocomplain x
     trace add variable x array traceArray2
     set result [trace info variable x]
     set result
 } [list [list array traceArray2]]
 test trace-5.5 {array traces properly listed in trace information} {
-    catch {unset x}
+    unset -nocomplain x
     trace variable x a traceArray2
     set result [trace vinfo x]
     set result
 } [list [list a traceArray2]]
 test trace-5.6 {array traces don't fire on scalar variables} {
-    catch {unset x}
+    unset -nocomplain x
     set x foo
     trace add variable x array traceArray2
     set ::info {}
@@ -410,14 +408,14 @@ test trace-5.6 {array traces don't fire on scalar variables} {
     set ::info
 } {}
 test trace-5.7 {array traces fire for undefined variables} {
-    catch {unset x}
+    unset -nocomplain x
     trace add variable x array traceArray2
     set ::info {}
     array set x {a 1}
     set ::info
 } {x {} array}
 test trace-5.8 {array traces fire for undefined variables} {
-    catch {unset x}
+    unset -nocomplain x
     trace add variable x array {set x(foo) 1 ;#}
     set res "names: [array names x]"
 } {names: foo}
@@ -425,7 +423,7 @@ test trace-5.8 {array traces fire for undefined variables} {
 # Trace multiple trace types at once.
 
 test trace-6.1 {multiple ops traced at once} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x {read write unset} traceProc
     catch {set x}
@@ -436,7 +434,7 @@ test trace-6.1 {multiple ops traced at once} {
     set info
 } {x {} read x {} write x {} read x {} write x {} unset}
 test trace-6.2 {multiple ops traced on array element} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x(0) {read write unset} traceProc
     catch {set x(0)}
@@ -448,7 +446,7 @@ test trace-6.2 {multiple ops traced on array element} {
     set info
 } {x 0 read x 0 write x 0 read x 0 write x 0 unset}
 test trace-6.3 {multiple ops traced on whole array} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x {read write unset} traceProc
     catch {set x(0)}
@@ -463,7 +461,7 @@ test trace-6.3 {multiple ops traced on whole array} {
 # Check order of invocation of traces
 
 test trace-7.1 {order of invocation of traces} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x read "traceTag 1"
     trace add variable x read "traceTag 2"
@@ -474,7 +472,7 @@ test trace-7.1 {order of invocation of traces} {
     set info
 } {3 2 1 3 2 1}
 test trace-7.2 {order of invocation of traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 44
     set info {}
     trace add variable x(0) read "traceTag 1"
@@ -484,7 +482,7 @@ test trace-7.2 {order of invocation of traces} {
     set info
 } {3 2 1}
 test trace-7.3 {order of invocation of traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 44
     set info {}
     trace add variable x(0) read "traceTag 1"
@@ -500,7 +498,7 @@ test trace-7.3 {order of invocation of traces} {
 # Check effects of errors in trace procedures
 
 test trace-8.1 {error returns from traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x 123
     set info {}
     trace add variable x read "traceTag 1"
@@ -508,7 +506,7 @@ test trace-8.1 {error returns from traces} {
     list [catch {set x} msg] $msg $info
 } {1 {can't read "x": trace returned error} {}}
 test trace-8.2 {error returns from traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x 123
     set info {}
     trace add variable x write "traceTag 1"
@@ -516,14 +514,14 @@ test trace-8.2 {error returns from traces} {
     list [catch {set x 44} msg] $msg $info
 } {1 {can't set "x": trace returned error} {}}
 test trace-8.3 {error returns from traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x 123
     set info {}
     trace add variable x write traceError
     list [catch {append x 44} msg] $msg $info
 } {1 {can't set "x": trace returned error} {}}
 test trace-8.4 {error returns from traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x 123
     set info {}
     trace add variable x unset "traceTag 1"
@@ -531,7 +529,7 @@ test trace-8.4 {error returns from traces} {
     list [catch {unset x} msg] $msg $info
 } {0 {} 1}
 test trace-8.5 {error returns from traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 123
     set info {}
     trace add variable x(0) read "traceTag 1"
@@ -541,7 +539,7 @@ test trace-8.5 {error returns from traces} {
     list [catch {set x(0)} msg] $msg $info
 } {1 {can't read "x(0)": trace returned error} 3}
 test trace-8.6 {error returns from traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x 123
     trace add variable x unset traceError
     list [catch {unset x} msg] $msg
@@ -550,7 +548,7 @@ test trace-8.7 {error returns from traces} {
     # This test just makes sure that the memory for the error message
     # gets deallocated correctly when the trace is invoked again or
     # when the trace is deleted.
-    catch {unset x}
+    unset -nocomplain x
     set x 123
     trace add variable x read traceError
     catch {set x}
@@ -571,7 +569,7 @@ test trace-8.8 {error returns from traces} {
 	trace add    variable ::x write [list foo $::x]
 	error "foo"
     }
-    catch {unset ::x ::y}
+    unset -nocomplain ::x ::y
     set x junk
     trace add variable ::x write [list foo $x]
     for {set y 0} {$y<100} {incr y} {
@@ -585,31 +583,31 @@ test trace-8.8 {error returns from traces} {
 # a new copy of the variables.
 
 test trace-9.1 {be sure variable is unset before trace is called} {
-    catch {unset x}
+    unset -nocomplain x
     set x 33
     set info {}
-    trace add variable x unset {traceCheck {uplevel set x}}
+    trace add variable x unset {traceCheck {uplevel 1 set x}}
     unset x
     set info
 } {1 {can't read "x": no such variable}}
 test trace-9.2 {be sure variable is unset before trace is called} {
-    catch {unset x}
+    unset -nocomplain x
     set x 33
     set info {}
-    trace add variable x unset {traceCheck {uplevel set x 22}}
+    trace add variable x unset {traceCheck {uplevel 1 set x 22}}
     unset x
     concat $info [list [catch {set x} msg] $msg]
 } {0 22 0 22}
 test trace-9.3 {be sure traces are cleared before unset trace called} {
-    catch {unset x}
+    unset -nocomplain x
     set x 33
     set info {}
-    trace add variable x unset {traceCheck {uplevel trace info variable x}}
+    trace add variable x unset {traceCheck {uplevel 1 trace info variable x}}
     unset x
     set info
 } {0 {}}
 test trace-9.4 {set new trace during unset trace} {
-    catch {unset x}
+    unset -nocomplain x
     set x 33
     set info {}
     trace add variable x unset {traceCheck {global x; trace add variable x unset traceProc}}
@@ -618,23 +616,23 @@ test trace-9.4 {set new trace during unset trace} {
 } {0 {} {unset traceProc}}
 
 test trace-10.1 {make sure array elements are unset before traces are called} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 33
     set info {}
-    trace add variable x(0) unset {traceCheck {uplevel set x(0)}}
+    trace add variable x(0) unset {traceCheck {uplevel 1 set x(0)}}
     unset x(0)
     set info
 } {1 {can't read "x(0)": no such element in array}}
 test trace-10.2 {make sure array elements are unset before traces are called} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 33
     set info {}
-    trace add variable x(0) unset {traceCheck {uplevel set x(0) zzz}}
+    trace add variable x(0) unset {traceCheck {uplevel 1 set x(0) zzz}}
     unset x(0)
     concat $info [list [catch {set x(0)} msg] $msg]
 } {0 zzz 0 zzz}
 test trace-10.3 {array elements are unset before traces are called} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 33
     set info {}
     trace add variable x(0) unset {traceCheck {global x; trace info variable x(0)}}
@@ -642,49 +640,49 @@ test trace-10.3 {array elements are unset before traces are called} {
     set info
 } {0 {}}
 test trace-10.4 {set new array element trace during unset trace} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 33
     set info {}
-    trace add variable x(0) unset {traceCheck {uplevel {trace add variable x(0) read {}}}}
-    catch {unset x(0)}
+    trace add variable x(0) unset {traceCheck {uplevel 1 {trace add variable x(0) read {}}}}
+    unset -nocomplain x(0)
     concat $info [trace info variable x(0)]
 } {0 {} {read {}}}
 
 test trace-11.1 {make sure arrays are unset before traces are called} {
-    catch {unset x}
+    unset -nocomplain x
     set x(0) 33
     set info {}
-    trace add variable x unset {traceCheck {uplevel set x(0)}}
+    trace add variable x unset {traceCheck {uplevel 1 set x(0)}}
     unset x
     set info
 } {1 {can't read "x(0)": no such variable}}
 test trace-11.2 {make sure arrays are unset before traces are called} {
-    catch {unset x}
+    unset -nocomplain x
     set x(y) 33
     set info {}
-    trace add variable x unset {traceCheck {uplevel set x(y) 22}}
+    trace add variable x unset {traceCheck {uplevel 1 set x(y) 22}}
     unset x
     concat $info [list [catch {set x(y)} msg] $msg]
 } {0 22 0 22}
 test trace-11.3 {make sure arrays are unset before traces are called} {
-    catch {unset x}
+    unset -nocomplain x
     set x(y) 33
     set info {}
-    trace add variable x unset {traceCheck {uplevel array exists x}}
+    trace add variable x unset {traceCheck {uplevel 1 array exists x}}
     unset x
     set info
 } {0 0}
 test trace-11.4 {make sure arrays are unset before traces are called} {
-    catch {unset x}
+    unset -nocomplain x
     set x(y) 33
     set info {}
-    set cmd {traceCheck {uplevel {trace info variable x}}}
+    set cmd {traceCheck {uplevel 1 {trace info variable x}}}
     trace add variable x unset $cmd
     unset x
     set info
 } {0 {}}
 test trace-11.5 {set new array trace during unset trace} {
-    catch {unset x}
+    unset -nocomplain x
     set x(y) 33
     set info {}
     trace add variable x unset {traceCheck {global x; trace add variable x read {}}}
@@ -692,7 +690,7 @@ test trace-11.5 {set new array trace during unset trace} {
     concat $info [trace info variable x]
 } {0 {} {read {}}}
 test trace-11.6 {create scalar during array unset trace} {
-    catch {unset x}
+    unset -nocomplain x
     set x(y) 33
     set info {}
     trace add variable x unset {traceCheck {global x; set x 44}}
@@ -703,52 +701,52 @@ test trace-11.6 {create scalar during array unset trace} {
 # Check special conditions (e.g. errors) in Tcl_TraceVar2.
 
 test trace-12.1 {creating array when setting variable traces} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x(0) write traceProc
     list [catch {set x 22} msg] $msg
 } {1 {can't set "x": variable is array}}
 test trace-12.2 {creating array when setting variable traces} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x(0) write traceProc
     list [catch {set x(0)} msg] $msg
 } {1 {can't read "x(0)": no such element in array}}
 test trace-12.3 {creating array when setting variable traces} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x(0) write traceProc
     set x(0) 22
     set info
 } {x 0 write}
 test trace-12.4 {creating variable when setting variable traces} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write traceProc
     list [catch {set x} msg] $msg
 } {1 {can't read "x": no such variable}}
 test trace-12.5 {creating variable when setting variable traces} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write traceProc
     set x 22
     set info
 } {x {} write}
 test trace-12.6 {creating variable when setting variable traces} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write traceProc
     set x(0) 22
     set info
 } {x 0 write}
 test trace-12.7 {create array element during read trace} {
-    catch {unset x}
+    unset -nocomplain x
     set x(2) zzz
     trace add variable x read {traceCrtElement xyzzy}
     list [catch {set x(3)} msg] $msg
 } {0 xyzzy}
 test trace-12.8 {errors when setting variable traces} {
-    catch {unset x}
+    unset -nocomplain x
     set x 44
     list [catch {trace add variable x(0) write traceProc} msg] $msg
 } {1 {can't trace "x(0)": variable isn't array}}
@@ -762,7 +760,7 @@ test trace-13.1 {delete one trace from another} {
 	trace remove variable x read {traceTag 3}
 	trace remove variable x read {traceTag 4}
     }
-    catch {unset x}
+    unset -nocomplain x
     set x 44
     set info {}
     trace add variable x read {traceTag 1}
@@ -916,13 +914,13 @@ test trace-14.11 {trace command, "trace variable" errors} {
 
 
 test trace-14.12 {trace command ("remove variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write traceProc
     trace remove variable x write traceProc
 } {}
 test trace-14.13 {trace command ("remove variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write traceProc
     trace remove variable x write traceProc
@@ -930,7 +928,7 @@ test trace-14.13 {trace command ("remove variable" option)} {
     set info
 } {}
 test trace-14.14 {trace command ("remove variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write {traceTag 1}
     trace add variable x write traceProc
@@ -945,7 +943,7 @@ test trace-14.14 {trace command ("remove variable" option)} {
     set info
 } {2 x {} write 1 2 1 2}
 test trace-14.15 {trace command ("remove variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write {traceTag 1}
     trace remove variable x write non_existent
@@ -953,27 +951,27 @@ test trace-14.15 {trace command ("remove variable" option)} {
     set info
 } {1}
 test trace-14.16 {trace command ("info variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     trace add variable x write {traceTag 1}
     trace add variable x write traceProc
     trace add variable x write {traceTag 2}
     trace info variable x
 } {{write {traceTag 2}} {write traceProc} {write {traceTag 1}}}
 test trace-14.17 {trace command ("info variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     trace info variable x
 } {}
 test trace-14.18 {trace command ("info variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     trace info variable x(0)
 } {}
 test trace-14.19 {trace command ("info variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     set x 44
     trace info variable x(0)
 } {}
 test trace-14.20 {trace command ("info variable" option)} {
-    catch {unset x}
+    unset -nocomplain x
     set x 44
     trace add variable x write {traceTag 1}
     proc check {} {global x; trace info variable x}
@@ -983,7 +981,7 @@ test trace-14.20 {trace command ("info variable" option)} {
 # Check fancy trace commands (long ones, weird arguments, etc.)
 
 test trace-15.1 {long trace command} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x write {traceTag {This is a very very long argument.  It's \
 	designed to test out the facilities of TraceVarProc for dealing \
@@ -1001,14 +999,14 @@ test trace-15.2 {long trace command result to ignore} {
     proc longResult {args} {return "quite a bit of text, designed to
 	generate a core leak if this command file is invoked over and over again
 	and memory isn't being recycled correctly"}
-    catch {unset x}
+    unset -nocomplain x
     trace add variable x write longResult
     set x 44
     set x 5
     set x abcde
 } abcde
 test trace-15.3 {special list-handling in trace commands} {
-    catch {unset "x y z"}
+    unset -nocomplain "x y z"
     set "x y z(a\n\{)" 44
     set info {}
     trace add variable "x y z(a\n\{)" write traceProc
@@ -1020,18 +1018,18 @@ test trace-15.3 {special list-handling in trace commands} {
 
 proc traceUnset {unsetName args} {
     global info
-    upvar $unsetName x
+    upvar 1 $unsetName x
     lappend info [catch {unset x} msg] $msg [catch {set x} msg] $msg
 }
 proc traceReset {unsetName resetName args} {
     global info
-    upvar $unsetName x $resetName y
+    upvar 1 $unsetName x $resetName y
     lappend info [catch {unset x} msg] $msg [catch {set y xyzzy} msg] $msg
 }
 proc traceReset2 {unsetName resetName args} {
     global info
-    lappend info [catch {uplevel unset $unsetName} msg] $msg \
-	    [catch {uplevel set $resetName xyzzy} msg] $msg
+    lappend info [catch {uplevel 1 unset $unsetName} msg] $msg \
+	    [catch {uplevel 1 set $resetName xyzzy} msg] $msg
 }
 proc traceAppend {string name1 name2 op} {
     global info
@@ -1039,7 +1037,7 @@ proc traceAppend {string name1 name2 op} {
 }
 
 test trace-16.1 {unsets during read traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y 1234
     set info {}
     trace add variable y read {traceUnset y}
@@ -1047,49 +1045,49 @@ test trace-16.1 {unsets during read traces} {
     lappend info [catch {set y} msg] $msg
 } {unset 0 {} 1 {can't read "x": no such variable} 1 {can't read "y": no such variable}}
 test trace-16.2 {unsets during read traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) read {traceUnset y(0)}
     lappend info [catch {set y(0)} msg] $msg
 } {0 {} 1 {can't read "x": no such variable} 1 {can't read "y(0)": no such element in array}}
 test trace-16.3 {unsets during read traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) read {traceUnset y}
     lappend info [catch {set y(0)} msg] $msg
 } {0 {} 1 {can't read "x": no such variable} 1 {can't read "y(0)": no such variable}}
 test trace-16.4 {unsets during read traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y 1234
     set info {}
     trace add variable y read {traceReset y y}
     lappend info [catch {set y} msg] $msg
 } {0 {} 0 xyzzy 0 xyzzy}
 test trace-16.5 {unsets during read traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) read {traceReset y(0) y(0)}
     lappend info [catch {set y(0)} msg] $msg
 } {0 {} 0 xyzzy 0 xyzzy}
 test trace-16.6 {unsets during read traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) read {traceReset y y(0)}
     lappend info [catch {set y(0)} msg] $msg [catch {set y(0)} msg] $msg
 } {0 {} 1 {can't set "y": upvar refers to element in deleted array} 1 {can't read "y(0)": no such variable} 1 {can't read "y(0)": no such variable}}
 test trace-16.7 {unsets during read traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) read {traceReset2 y y(0)}
     lappend info [catch {set y(0)} msg] $msg [catch {set y(0)} msg] $msg
 } {0 {} 0 xyzzy 1 {can't read "y(0)": no such element in array} 0 xyzzy}
 test trace-16.8 {unsets during write traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y 1234
     set info {}
     trace add variable y write {traceUnset y}
@@ -1097,91 +1095,91 @@ test trace-16.8 {unsets during write traces} {
     lappend info [catch {set y xxx} msg] $msg
 } {unset 0 {} 1 {can't read "x": no such variable} 0 {}}
 test trace-16.9 {unsets during write traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) write {traceUnset y(0)}
     lappend info [catch {set y(0) xxx} msg] $msg
 } {0 {} 1 {can't read "x": no such variable} 0 {}}
 test trace-16.10 {unsets during write traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) write {traceUnset y}
     lappend info [catch {set y(0) xxx} msg] $msg
 } {0 {} 1 {can't read "x": no such variable} 0 {}}
 test trace-16.11 {unsets during write traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y 1234
     set info {}
     trace add variable y write {traceReset y y}
     lappend info [catch {set y xxx} msg] $msg
 } {0 {} 0 xyzzy 0 xyzzy}
 test trace-16.12 {unsets during write traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) write {traceReset y(0) y(0)}
     lappend info [catch {set y(0) xxx} msg] $msg
 } {0 {} 0 xyzzy 0 xyzzy}
 test trace-16.13 {unsets during write traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) write {traceReset y y(0)}
     lappend info [catch {set y(0) xxx} msg] $msg [catch {set y(0)} msg] $msg
 } {0 {} 1 {can't set "y": upvar refers to element in deleted array} 0 {} 1 {can't read "y(0)": no such variable}}
 test trace-16.14 {unsets during write traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) write {traceReset2 y y(0)}
     lappend info [catch {set y(0) xxx} msg] $msg [catch {set y(0)} msg] $msg
 } {0 {} 0 xyzzy 0 {} 0 xyzzy}
 test trace-16.15 {unsets during unset traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y 1234
     set info {}
     trace add variable y unset {traceUnset y}
     lappend info [catch {unset y} msg] $msg [catch {set y} msg] $msg
 } {1 {can't unset "x": no such variable} 1 {can't read "x": no such variable} 0 {} 1 {can't read "y": no such variable}}
 test trace-16.16 {unsets during unset traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) unset {traceUnset y(0)}
     lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
 } {1 {can't unset "x": no such variable} 1 {can't read "x": no such variable} 0 {} 1 {can't read "y(0)": no such element in array}}
 test trace-16.17 {unsets during unset traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) unset {traceUnset y}
     lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
 } {0 {} 1 {can't read "x": no such variable} 0 {} 1 {can't read "y(0)": no such variable}}
 test trace-16.18 {unsets during unset traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y 1234
     set info {}
     trace add variable y unset {traceReset2 y y}
     lappend info [catch {unset y} msg] $msg [catch {set y} msg] $msg
 } {1 {can't unset "y": no such variable} 0 xyzzy 0 {} 0 xyzzy}
 test trace-16.19 {unsets during unset traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) unset {traceReset2 y(0) y(0)}
     lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
 } {1 {can't unset "y(0)": no such element in array} 0 xyzzy 0 {} 0 xyzzy}
 test trace-16.20 {unsets during unset traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) unset {traceReset2 y y(0)}
     lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
 } {0 {} 0 xyzzy 0 {} 0 xyzzy}
 test trace-16.21 {unsets cancelling traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y 1234
     set info {}
     trace add variable y read {traceAppend first}
@@ -1191,7 +1189,7 @@ test trace-16.21 {unsets cancelling traces} {
     lappend info [catch {set y} msg] $msg
 } {third unset 0 {} 1 {can't read "x": no such variable} 1 {can't read "y": no such variable}}
 test trace-16.22 {unsets cancelling traces} {
-    catch {unset y}
+    unset -nocomplain y
     set y(0) 1234
     set info {}
     trace add variable y(0) read {traceAppend first}
@@ -1204,19 +1202,19 @@ test trace-16.22 {unsets cancelling traces} {
 # Check various non-interference between traces and other things.
 
 test trace-17.1 {trace doesn't prevent unset errors} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     trace add variable x unset {traceProc}
     list [catch {unset x} msg] $msg $info
 } {1 {can't unset "x": no such variable} {x {} unset}}
 test trace-17.2 {traced variables must survive procedure exits} {
-    catch {unset x}
+    unset -nocomplain x
     proc p1 {} {global x; trace add variable x write traceProc}
     p1
     trace info variable x
 } {{write traceProc}}
 test trace-17.3 {traced variables must survive procedure exits} {
-    catch {unset x}
+    unset -nocomplain x
     set info {}
     proc p1 {} {global x; trace add variable x write traceProc}
     p1
@@ -1229,7 +1227,7 @@ test trace-17.3 {traced variables must survive procedure exits} {
 
 test trace-18.1 {unset traces on procedure returns} {
     proc p1 {x y} {set a 44; p2 14}
-    proc p2 {z} {trace add variable z unset {traceCheck {lsort [uplevel {info vars}]}}}
+    proc p2 {z} {trace add variable z unset {traceCheck {lsort [uplevel 1 {info vars}]}}}
     set info {}
     p1 foo bar
     set info
@@ -1269,8 +1267,7 @@ test trace-18.4 {namespace delete / trace vdelete combo, Bug \#1338280} {
 # Delete arrays when done, so they can be re-used as scalars
 # elsewhere.
 
-catch {unset x}
-catch {unset y}
+unset -nocomplain x y
 
 test trace-19.0.1 {trace add command (command existence)} {
     # Just in case!
@@ -1542,8 +1539,7 @@ proc foo {b} { set a $b }
 # Delete arrays when done, so they can be re-used as scalars
 # elsewhere.
 
-catch {unset x}
-catch {unset y}
+unset -nocomplain x y
 
 # Delete procedures when done, so we don't clash with other tests
 # (e.g. foobar will clash with 'unknown' tests).
@@ -2050,7 +2046,7 @@ test trace-28.1 {enterstep and leavestep traces with update idletasks (615043)}
     trace remove execution foo {enter enterstep leavestep leave} \
         [list traceExecute foo]
     rename foo {}
-    catch {unset a}
+    unset -nocomplain a
     join $info "\n"
 } {foo foo enter
 foo {set a 1} enterstep
@@ -2634,9 +2630,8 @@ catch {rename traceproc {}}
 catch {rename runbase {}}
 
 # Unset the variable when done
-catch {unset info}
-catch {unset base}
+unset -nocomplain info base
 
 # cleanup
-::tcltest::cleanupTests
+cleanupTests
 return
diff --git a/tests/unixInit.test b/tests/unixInit.test
index 9ba9c11..05338ed 100644
--- a/tests/unixInit.test
+++ b/tests/unixInit.test
@@ -11,7 +11,7 @@
 # this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
 package require tcltest 2.2
-namespace import -force ::tcltest::*
+namespace import ::tcltest::*
 unset -nocomplain path
 catch {set oldlang $env(LANG)}
 set env(LANG) C
@@ -44,11 +44,11 @@ test unixInit-1.2 {initialisation: standard channel type deduction} {unix stdio}
     set pipe1 [open "|[list [interpreter]]" r+]
     puts $pipe1 {
 	proc accept {channel host port} {
-	    puts $channel {puts [fconfigure stdin -peername]; exit}
+	    puts $channel {puts [chan configure stdin -peername]; exit}
 	    close $channel
 	    exit
 	}
-	puts [fconfigure [socket -server accept -myaddr 127.0.0.1 0] -sockname]
+	puts [chan configure [socket -server accept -myaddr 127.0.0.1 0] -sockname]
 	vwait forever \
 	    }
     # Note the backslash above; this is important to make sure that the whole
@@ -64,8 +64,8 @@ test unixInit-1.2 {initialisation: standard channel type deduction} {unix stdio}
     set pipe2 [open "|[list [interpreter] <@$sock]" r]
     set result [gets $pipe2]
     # Clear any pending data; stops certain kinds of (non-important) errors
-    fconfigure $pipe1 -blocking 0; gets $pipe1
-    fconfigure $pipe2 -blocking 0; gets $pipe2
+    chan configure $pipe1 -blocking 0; gets $pipe1
+    chan configure $pipe2 -blocking 0; gets $pipe2
     # Close the pipes and the socket.
     close $pipe2
     close $pipe1
@@ -329,7 +329,7 @@ test unixInit-3.1 {TclpSetInitialEncodings} -constraints {
 } -body {
     set env(LANG) C
     set f [open "|[list [interpreter]]" w+]
-    fconfigure $f -buffering none
+    chan configure $f -buffering none
     puts $f {puts [encoding system]; exit}
     set enc [gets $f]
     close $f
@@ -344,7 +344,7 @@ test unixInit-3.2 {TclpSetInitialEncodings} -setup {
     set env(LANG) japanese
     set env(LC_ALL) japanese
     set f [open "|[list [interpreter]]" w+]
-    fconfigure $f -buffering none
+    chan configure $f -buffering none
     puts $f {puts [encoding system]; exit}
     set enc [gets $f]
     close $f
@@ -390,7 +390,7 @@ test unixInit-7.1 {closed standard channel: Bug 772288} -constraints {
 } -returnCodes 0
 
 # cleanup
-catch {unset env(LANG)}
+unset -nocomplain env(LANG)
 catch {set env(LANG) $oldlang}
 unset -nocomplain path
 ::tcltest::cleanupTests
diff --git a/tests/unknown.test b/tests/unknown.test
index 40be6602..e80d3a6 100644
--- a/tests/unknown.test
+++ b/tests/unknown.test
@@ -11,12 +11,10 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
-    namespace import -force ::tcltest::*
-}
+package require tcltest 2
+namespace import ::tcltest::*
 
-catch {unset x}
+unset -nocomplain x
 catch {rename unknown unknown.old}
 
 test unknown-1.1 {non-existent "unknown" command} {
@@ -59,7 +57,7 @@ test unknown-4.1 {errors in "unknown" procedure} {
 # cleanup
 catch {rename unknown {}}
 catch {rename unknown.old unknown}
-::tcltest::cleanupTests
+cleanupTests
 return 
 
 # Local Variables:
diff --git a/tests/var.test b/tests/var.test
index ed7e930..5939100 100644
--- a/tests/var.test
+++ b/tests/var.test
@@ -793,6 +793,75 @@ test var-19.1 {crash when freeing locals hashtable: Bug 3037525} {
     foo ; # This crashes without the fix for the bug
     rename foo {}
 } {}
+
+test var-20.1 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	global x
+	array set x {a 1}
+    }}
+    array size x
+} -result 1
+test var-20.2 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	global x
+	array set x {}
+    }}
+    array size x
+} -result 0
+test var-20.3 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	array set ::x {a 1}
+    }}
+    array size x
+} -result 1
+test var-20.4 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	array set ::x {}
+    }}
+    array size x
+} -result 0
+test var-20.5 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	global x
+	eval {array set x {a 1}}
+    }}
+    array size x
+} -result 1
+test var-20.6 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	global x
+	eval {array set x {}}
+    }}
+    array size x
+} -result 0
+test var-20.7 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	eval {array set ::x {a 1}}
+    }}
+    array size x
+} -result 1
+test var-20.8 {array set compilation correctness: Bug 3603163} -setup {
+    unset -nocomplain x
+} -body {
+    apply {{} {
+	eval {array set ::x {}}
+    }}
+    array size x
+} -result 0
 
 catch {namespace delete ns}
 catch {unset arr}
diff --git a/tests/zlib.test b/tests/zlib.test
index 891dba0..c469eea 100644
--- a/tests/zlib.test
+++ b/tests/zlib.test
@@ -366,6 +366,25 @@ test zlib-8.15 {transformtion and fconfigure} -setup {
     catch {close $inSide}
     catch {$strm close}
 } -result {358 358}
+test zlib-8.16 {Bug 3603553: buffer transfer with large writes} -setup {
+    # Actual data isn't very important; needs to be substantially larger than
+    # the internal buffer (32kB) and incompressible.
+    set largeData {}
+    for {set i 0;expr srand(1)} {$i < 100000} {incr i} {
+	append largeData [lindex "a b c d e f g h i j k l m n o p" \
+		[expr {int(16*rand())}]]
+    }
+    set file [makeFile {} test.gz]
+} -constraints zlib -body {
+    set f [open $file wb]
+    fconfigure $f -buffering none
+    zlib push gzip $f
+    puts -nonewline $f $largeData
+    close $f
+    file size $file
+} -cleanup {
+    removeFile $file
+} -result 57647
 
 test zlib-9.1 "check fcopy with push" -constraints zlib -setup {
     set sfile [makeFile {} testsrc.gz]
diff --git a/unix/Makefile.in b/unix/Makefile.in
index 287f065..d45b139 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -887,8 +887,8 @@ install-libraries: libraries
 	@echo "Installing package tcltest 2.3.5 as a Tcl Module";
 	@$(INSTALL_DATA) $(TOP_DIR)/library/tcltest/tcltest.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.5/tcltest-2.3.5.tm;
 
-	@echo "Installing package platform 1.0.10 as a Tcl Module";
-	@$(INSTALL_DATA) $(TOP_DIR)/library/platform/platform.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.4/platform-1.0.10.tm;
+	@echo "Installing package platform 1.0.11 as a Tcl Module";
+	@$(INSTALL_DATA) $(TOP_DIR)/library/platform/platform.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.4/platform-1.0.11.tm;
 	@echo "Installing package platform::shell 1.1.4 as a Tcl Module";
 	@$(INSTALL_DATA) $(TOP_DIR)/library/platform/shell.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.4/platform/shell-1.1.4.tm;
 
@@ -902,10 +902,39 @@ install-libraries: libraries
 	        "$(SCRIPT_INSTALL_DIR)"/tm.tcl; \
 	fi
 
-install-tzdata: ${NATIVE_TCLSH}
+install-tzdata:
+	@for i in tzdata; \
+	    do \
+	    if [ ! -d "$(SCRIPT_INSTALL_DIR)"/$$i ] ; then \
+		echo "Making directory $(SCRIPT_INSTALL_DIR)/$$i"; \
+		$(INSTALL_DATA_DIR) "$(SCRIPT_INSTALL_DIR)"/$$i; \
+		else true; \
+		fi; \
+	    done;
 	@echo "Installing time zone files to $(SCRIPT_INSTALL_DIR)/tzdata/"
-	@${NATIVE_TCLSH} $(TOOL_DIR)/installData.tcl \
-	    $(TOP_DIR)/library/tzdata "$(SCRIPT_INSTALL_DIR)"/tzdata
+	@for i in $(TOP_DIR)/library/tzdata/* ; do \
+	    if [ -d $$i ] ; then \
+		ii=`basename $$i`; \
+		if [ ! -d "$(SCRIPT_INSTALL_DIR)"/tzdata/$$ii ] ; then \
+		    $(INSTALL_DATA_DIR) "$(SCRIPT_INSTALL_DIR)"/tzdata/$$ii; \
+		fi; \
+		for j in $$i/* ; do \
+		    if [ -d $$j ] ; then \
+			jj=`basename $$j`; \
+			if [ ! -d "$(SCRIPT_INSTALL_DIR)"/tzdata/$$ii/$$jj ] ; then \
+			    $(INSTALL_DATA_DIR) "$(SCRIPT_INSTALL_DIR)"/tzdata/$$ii/$$jj; \
+			fi; \
+			for k in $$j/* ; do \
+			    $(INSTALL_DATA) $$k "$(SCRIPT_INSTALL_DIR)"/tzdata/$$ii/$$jj; \
+			done; \
+		    else \
+			$(INSTALL_DATA) $$j "$(SCRIPT_INSTALL_DIR)"/tzdata/$$ii; \
+		    fi; \
+		done; \
+	    else \
+		$(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/tzdata; \
+	    fi; \
+	done;
 
 install-msgs:
 	@for i in msgs; \
@@ -1757,7 +1786,7 @@ install-packages: packages
 	  fi; \
 	done
 
-test-packages: tcltest packages
+test-packages: ${TCLTEST_EXE} packages
 	@for i in $(PKGS_DIR)/*; do \
 	  if [ -d $$i ]; then \
 	    pkg=`basename $$i`; \
diff --git a/unix/tclUnixCompat.c b/unix/tclUnixCompat.c
index e201018..2a68f7f 100644
--- a/unix/tclUnixCompat.c
+++ b/unix/tclUnixCompat.c
@@ -995,12 +995,19 @@ TclWinCPUID(
 
     /* See: <http://en.wikipedia.org/wiki/CPUID> */
 #if defined(HAVE_CPUID)
-    __asm__ __volatile__("mov %%ebx, %%edi     \n\t" /* save %ebx */
+#if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
+    __asm__ __volatile__("movq %%rbx, %%rsi     \n\t" /* save %rbx */
                  "cpuid            \n\t"
-                 "mov %%ebx, %%esi   \n\t" /* save what cpuid just put in %ebx */
-                 "mov %%edi, %%ebx  \n\t" /* restore the old %ebx */
+                 "xchgq %%rsi, %%rbx   \n\t" /* restore the old %rbx */
                  : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3])
-                 : "a"(index) : "edi");
+                 : "a"(index));
+#else
+    __asm__ __volatile__("mov %%ebx, %%esi     \n\t" /* save %ebx */
+                 "cpuid            \n\t"
+                 "xchg %%esi, %%ebx   \n\t" /* restore the old %ebx */
+                 : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3])
+                 : "a"(index));
+#endif
     status = TCL_OK;
 #endif
     return status;
diff --git a/unix/tclUnixFCmd.c b/unix/tclUnixFCmd.c
index 559992f..6f443a9 100644
--- a/unix/tclUnixFCmd.c
+++ b/unix/tclUnixFCmd.c
@@ -244,7 +244,7 @@ MODULE_SCOPE long tclMacOSXDarwinRelease;
 #endif /* NO_REALPATH */
 
 #ifdef HAVE_FTS
-#ifdef HAVE_STRUCT_STAT64
+#if defined(HAVE_STRUCT_STAT64) && !defined(__APPLE__)
 /* fts doesn't do stat64 */
 #   define noFtsStat	1
 #elif defined(__APPLE__) && defined(__LP64__) && \
diff --git a/unix/tclUnixFile.c b/unix/tclUnixFile.c
index 38504d9..5bfe5d9 100644
--- a/unix/tclUnixFile.c
+++ b/unix/tclUnixFile.c
@@ -1181,9 +1181,10 @@ TclpUtime(
 int
 TclOSstat(
     const char *name,
-    Tcl_StatBuf *statBuf)
+    void *cygstat)
 {
     struct stat buf;
+    Tcl_StatBuf *statBuf = cygstat;
     int result = stat(name, &buf);
 
     statBuf->st_mode = buf.st_mode;
@@ -1203,9 +1204,10 @@ TclOSstat(
 int
 TclOSlstat(
     const char *name,
-    Tcl_StatBuf *statBuf)
+    void *cygstat)
 {
     struct stat buf;
+    Tcl_StatBuf *statBuf = cygstat;
     int result = lstat(name, &buf);
 
     statBuf->st_mode = buf.st_mode;
diff --git a/unix/tclUnixPort.h b/unix/tclUnixPort.h
index 63c500d..59a35ba 100644
--- a/unix/tclUnixPort.h
+++ b/unix/tclUnixPort.h
@@ -21,10 +21,6 @@
 
 #ifndef _TCLUNIXPORT
 #define _TCLUNIXPORT
-
-#ifndef MODULE_SCOPE
-#define MODULE_SCOPE	extern
-#endif
 
 /*
  *---------------------------------------------------------------------------
@@ -89,26 +85,26 @@ typedef off_t		Tcl_SeekOffset;
 #   define SOCKET unsigned int
 #   define WSAEWOULDBLOCK 10035
     typedef unsigned short WCHAR;
-    DLLIMPORT extern __stdcall int GetModuleHandleExW(unsigned int, const char *, void *);
-    DLLIMPORT extern __stdcall int GetModuleFileNameW(void *, const char *, int);
-    DLLIMPORT extern __stdcall int WideCharToMultiByte(int, int, const char *, int,
+    __declspec(dllimport) extern __stdcall int GetModuleHandleExW(unsigned int, const char *, void *);
+    __declspec(dllimport) extern __stdcall int GetModuleFileNameW(void *, const char *, int);
+    __declspec(dllimport) extern __stdcall int WideCharToMultiByte(int, int, const char *, int,
 	    const char *, int, const char *, const char *);
-    DLLIMPORT extern __stdcall int MultiByteToWideChar(int, int, const char *, int,
+    __declspec(dllimport) extern __stdcall int MultiByteToWideChar(int, int, const char *, int,
 	    WCHAR *, int);
-    DLLIMPORT extern __stdcall void OutputDebugStringW(const WCHAR *);
-    DLLIMPORT extern __stdcall int IsDebuggerPresent();
+    __declspec(dllimport) extern __stdcall void OutputDebugStringW(const WCHAR *);
+    __declspec(dllimport) extern __stdcall int IsDebuggerPresent();
 
-    DLLIMPORT extern int cygwin_conv_path(int, const void *, void *, int);
-    DLLIMPORT extern int cygwin_conv_path_list(int, const void *, void *, int);
+    __declspec(dllimport) extern int cygwin_conv_path(int, const void *, void *, int);
+    __declspec(dllimport) extern int cygwin_conv_path_list(int, const void *, void *, int);
 #   define USE_PUTENV 1
 #   define USE_PUTENV_FOR_UNSET 1
 /* On Cygwin, the environment is imported from the Cygwin DLL. */
 #   define environ __cygwin_environ
 #   define timezone _timezone
-    DLLIMPORT extern char **__cygwin_environ;
-    MODULE_SCOPE int TclOSstat(const char *name, Tcl_StatBuf *statBuf);
-    MODULE_SCOPE int TclOSlstat(const char *name, Tcl_StatBuf *statBuf);
-#elif defined(HAVE_STRUCT_STAT64)
+    extern char **__cygwin_environ;
+    extern int TclOSstat(const char *name, void *statBuf);
+    extern int TclOSlstat(const char *name, void *statBuf);
+#elif defined(HAVE_STRUCT_STAT64) && !defined(__APPLE__)
 #   define TclOSstat		stat64
 #   define TclOSlstat		lstat64
 #else
@@ -126,9 +122,7 @@ typedef off_t		Tcl_SeekOffset;
 #ifdef HAVE_SYS_SELECT_H
 #   include <sys/select.h>
 #endif
-#ifdef HAVE_SYS_STAT_H
-#   include <sys/stat.h>
-#endif
+#include <sys/stat.h>
 #if TIME_WITH_SYS_TIME
 #   include <sys/time.h>
 #   include <time.h>
@@ -159,7 +153,7 @@ typedef off_t		Tcl_SeekOffset;
 #   include "../compat/unistd.h"
 #endif
 
-MODULE_SCOPE int	TclUnixSetBlockingMode(int fd, int mode);
+extern int TclUnixSetBlockingMode(int fd, int mode);
 
 #include <utime.h>
 
@@ -319,7 +313,7 @@ MODULE_SCOPE int	TclUnixSetBlockingMode(int fd, int mode);
 #endif
 
 #ifdef GETTOD_NOT_DECLARED
-MODULE_SCOPE int	gettimeofday(struct timeval *tp,
+extern int	gettimeofday(struct timeval *tp,
 			    struct timezone *tzp);
 #endif
 
@@ -737,15 +731,15 @@ typedef int socklen_t;
 #include <pwd.h>
 #include <grp.h>
 
-MODULE_SCOPE struct passwd *	TclpGetPwNam(const char *name);
-MODULE_SCOPE struct group *	TclpGetGrNam(const char *name);
-MODULE_SCOPE struct passwd *	TclpGetPwUid(uid_t uid);
-MODULE_SCOPE struct group *	TclpGetGrGid(gid_t gid);
-MODULE_SCOPE struct hostent *	TclpGetHostByName(const char *name);
-MODULE_SCOPE struct hostent *	TclpGetHostByAddr(const char *addr,
+extern struct passwd *	TclpGetPwNam(const char *name);
+extern struct group *	TclpGetGrNam(const char *name);
+extern struct passwd *	TclpGetPwUid(uid_t uid);
+extern struct group *	TclpGetGrGid(gid_t gid);
+extern struct hostent *	TclpGetHostByName(const char *name);
+extern struct hostent *	TclpGetHostByAddr(const char *addr,
 				    int length, int type);
-MODULE_SCOPE Tcl_Channel	TclpMakeTcpClientChannelMode(
-				    ClientData tcpSocket, int mode);
+extern void *TclpMakeTcpClientChannelMode(
+				    void *tcpSocket, int mode);
 
 #endif /* _TCLUNIXPORT */
 
diff --git a/unix/tclUnixSock.c b/unix/tclUnixSock.c
index 31daa62..528f009 100644
--- a/unix/tclUnixSock.c
+++ b/unix/tclUnixSock.c
@@ -1202,7 +1202,7 @@ Tcl_Channel
 Tcl_MakeTcpClientChannel(
     ClientData sock)		/* The socket to wrap up into a channel. */
 {
-    return TclpMakeTcpClientChannelMode(sock, (TCL_READABLE | TCL_WRITABLE));
+    return (Tcl_Channel) TclpMakeTcpClientChannelMode(sock, (TCL_READABLE | TCL_WRITABLE));
 }
 
 /*
@@ -1222,9 +1222,9 @@ Tcl_MakeTcpClientChannel(
  *----------------------------------------------------------------------
  */
 
-Tcl_Channel
+void *
 TclpMakeTcpClientChannelMode(
-    ClientData sock,		/* The socket to wrap up into a channel. */
+    void *sock,		/* The socket to wrap up into a channel. */
     int mode)			/* ORed combination of TCL_READABLE and
 				 * TCL_WRITABLE to indicate file mode. */
 {
diff --git a/unix/tclUnixTest.c b/unix/tclUnixTest.c
index 46fc972..c10225d 100644
--- a/unix/tclUnixTest.c
+++ b/unix/tclUnixTest.c
@@ -200,7 +200,7 @@ TestfilehandlerCmd(
 	    return TCL_ERROR;
 	}
 	sprintf(buf, "%d %d", pipePtr->readCount, pipePtr->writeCount);
-	Tcl_SetResult(interp, buf, TCL_VOLATILE);
+	Tcl_AppendResult(interp, buf, NULL);
     } else if (strcmp(argv[1], "create") == 0) {
 	if (argc != 5) {
 	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",
@@ -217,8 +217,8 @@ TestfilehandlerCmd(
 	    fcntl(GetFd(pipePtr->readFile), F_SETFL, O_NONBLOCK);
 	    fcntl(GetFd(pipePtr->writeFile), F_SETFL, O_NONBLOCK);
 #else
-	    Tcl_SetResult(interp, "can't make pipes non-blocking",
-		    TCL_STATIC);
+	    Tcl_AppendResult(interp, "can't make pipes non-blocking",
+		    NULL);
 	    return TCL_ERROR;
 #endif
 	}
@@ -281,7 +281,7 @@ TestfilehandlerCmd(
 
 	memset(buffer, 'b', 10);
 	TclFormatInt(buf, write(GetFd(pipePtr->writeFile), buffer, 10));
-	Tcl_SetResult(interp, buf, TCL_VOLATILE);
+	Tcl_AppendResult(interp, buf, NULL);
     } else if (strcmp(argv[1], "oneevent") == 0) {
 	Tcl_DoOneEvent(TCL_FILE_EVENTS|TCL_DONT_WAIT);
     } else if (strcmp(argv[1], "wait") == 0) {
@@ -390,7 +390,7 @@ TestfilewaitCmd(
     if (Tcl_GetChannelHandle(channel,
 	    (mask & TCL_READABLE) ? TCL_READABLE : TCL_WRITABLE,
 	    (ClientData*) &data) != TCL_OK) {
-	Tcl_SetResult(interp, "couldn't get channel file", TCL_STATIC);
+	Tcl_AppendResult(interp, "couldn't get channel file", NULL);
 	return TCL_ERROR;
     }
     fd = PTR2INT(data);
diff --git a/unix/tclUnixTime.c b/unix/tclUnixTime.c
index c7921fe..926e8f4 100644
--- a/unix/tclUnixTime.c
+++ b/unix/tclUnixTime.c
@@ -503,7 +503,7 @@ SetTZIfNecessary(void)
 	if (lastTZ == NULL) {
 	    Tcl_CreateExitHandler(CleanupMemory, NULL);
 	} else {
-	    Tcl_Free(lastTZ);
+	    ckfree(lastTZ);
 	}
 	lastTZ = ckalloc(strlen(newTZ) + 1);
 	strcpy(lastTZ, newTZ);
diff --git a/win/Makefile.in b/win/Makefile.in
index d0e14c6..2764813 100644
--- a/win/Makefile.in
+++ b/win/Makefile.in
@@ -82,6 +82,11 @@ CFLAGS_OPTIMIZE	= @CFLAGS_OPTIMIZE@
 #CFLAGS = 		$(CFLAGS_DEBUG) $(CFLAGS_OPTIMIZE)
 CFLAGS = 		@CFLAGS@ @CFLAGS_DEFAULT@ -DUNICODE -D_UNICODE
 
+# To compile without backward compatibility and deprecated code uncomment the
+# following
+NO_DEPRECATED_FLAGS	=
+#NO_DEPRECATED_FLAGS	= -DTCL_NO_DEPRECATED
+
 # To enable compilation debugging reverse the comment characters on one of the
 # following lines.
 COMPILE_DEBUG_FLAGS =
@@ -187,7 +192,7 @@ COPY		= cp
 CC_SWITCHES = ${CFLAGS} ${CFLAGS_WARNING} ${TCL_SHLIB_CFLAGS} -I"${ZLIB_DIR}" \
 -I"${GENERIC_DIR_NATIVE}" -DTCL_TOMMATH -DMP_PREC=4 -I"${TOMMATH_DIR_NATIVE}" \
 -I"${WIN_DIR_NATIVE}" ${AC_FLAGS} \
-${COMPILE_DEBUG_FLAGS}
+${COMPILE_DEBUG_FLAGS} ${NO_DEPRECATED_FLAGS}
 
 CC_OBJNAME = @CC_OBJNAME@
 CC_EXENAME = @CC_EXENAME@
@@ -645,8 +650,8 @@ install-libraries: libraries install-tzdata install-msgs
 	@$(COPY) $(ROOT_DIR)/library/msgcat/msgcat.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.5/msgcat-1.5.0.tm;
 	@echo "Installing package tcltest 2.3.5 as a Tcl Module";
 	@$(COPY) $(ROOT_DIR)/library/tcltest/tcltest.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.5/tcltest-2.3.5.tm;
-	@echo "Installing package platform 1.0.10 as a Tcl Module";
-	@$(COPY) $(ROOT_DIR)/library/platform/platform.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.4/platform-1.0.10.tm;
+	@echo "Installing package platform 1.0.11 as a Tcl Module";
+	@$(COPY) $(ROOT_DIR)/library/platform/platform.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.4/platform-1.0.11.tm;
 	@echo "Installing package platform::shell 1.1.4 as a Tcl Module";
 	@$(COPY) $(ROOT_DIR)/library/platform/shell.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.4/platform/shell-1.1.4.tm;
 	@echo "Installing encodings";
diff --git a/win/tcl.m4 b/win/tcl.m4
index 5e8e135..8689cea 100644
--- a/win/tcl.m4
+++ b/win/tcl.m4
@@ -3,50 +3,124 @@
 #
 #	Locate the tclConfig.sh file and perform a sanity check on
 #	the Tcl compile flags
-#	Currently a no-op for Windows
 #
 # Arguments:
-#	PATCH_LEVEL	The patch level for Tcl if any.
+#	none
 #
 # Results:
 #
 #	Adds the following arguments to configure:
 #		--with-tcl=...
 #
-#	Sets the following vars:
-#		TCL_BIN_DIR	Full path to the tclConfig.sh file
+#	Defines the following vars:
+#		TCL_BIN_DIR	Full path to the directory containing
+#				the tclConfig.sh file
 #------------------------------------------------------------------------
 
 AC_DEFUN([SC_PATH_TCLCONFIG], [
-    AC_MSG_CHECKING([the location of tclConfig.sh])
+    #
+    # Ok, lets find the tcl configuration
+    # First, look for one uninstalled.
+    # the alternative search directory is invoked by --with-tcl
+    #
 
-    if test -d ../../tcl8.6$1/win;  then
-	TCL_BIN_DIR_DEFAULT=../../tcl8.6$1/win
-    elif test -d ../../tcl8.6/win;  then
-	TCL_BIN_DIR_DEFAULT=../../tcl8.6/win
-    else
-	TCL_BIN_DIR_DEFAULT=../../tcl/win
-    fi
+    if test x"${no_tcl}" = x ; then
+	# we reset no_tcl in case something fails here
+	no_tcl=true
+	AC_ARG_WITH(tcl,
+	    AC_HELP_STRING([--with-tcl],
+		[directory containing tcl configuration (tclConfig.sh)]),
+	    with_tclconfig="${withval}")
+	AC_MSG_CHECKING([for Tcl configuration])
+	AC_CACHE_VAL(ac_cv_c_tclconfig,[
+
+	    # First check to see if --with-tcl was specified.
+	    if test x"${with_tclconfig}" != x ; then
+		case "${with_tclconfig}" in
+		    */tclConfig.sh )
+			if test -f "${with_tclconfig}"; then
+			    AC_MSG_WARN([--with-tcl argument should refer to directory containing tclConfig.sh, not to tclConfig.sh itself])
+			    with_tclconfig="`echo "${with_tclconfig}" | sed 's!/tclConfig\.sh$!!'`"
+			fi ;;
+		esac
+		if test -f "${with_tclconfig}/tclConfig.sh" ; then
+		    ac_cv_c_tclconfig="`(cd "${with_tclconfig}"; pwd)`"
+		else
+		    AC_MSG_ERROR([${with_tclconfig} directory doesn't contain tclConfig.sh])
+		fi
+	    fi
 
-    AC_ARG_WITH(tcl, [  --with-tcl=DIR          use Tcl 8.6 binaries from DIR],
-	    TCL_BIN_DIR=$withval, TCL_BIN_DIR=`cd $TCL_BIN_DIR_DEFAULT; pwd`)
-    if test ! -d $TCL_BIN_DIR; then
-	AC_MSG_ERROR(Tcl directory $TCL_BIN_DIR does not exist)
-    fi
-    if test ! -f $TCL_BIN_DIR/tclConfig.sh; then
-	if test ! -f $TCL_BIN_DIR/../unix/tclConfig.sh; then
-	    AC_MSG_ERROR(There is no tclConfig.sh in $TCL_BIN_DIR:  perhaps you did not specify the Tcl *build* directory (not the toplevel Tcl directory) or you forgot to configure Tcl?)
+	    # then check for a private Tcl installation
+	    if test x"${ac_cv_c_tclconfig}" = x ; then
+		for i in \
+			../tcl \
+			`ls -dr ../tcl[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ../tcl[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ../tcl[[8-9]].[[0-9]]* 2>/dev/null` \
+			../../tcl \
+			`ls -dr ../../tcl[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ../../tcl[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ../../tcl[[8-9]].[[0-9]]* 2>/dev/null` \
+			../../../tcl \
+			`ls -dr ../../../tcl[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ../../../tcl[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ../../../tcl[[8-9]].[[0-9]]* 2>/dev/null` ; do
+		    if test -f "$i/win/tclConfig.sh" ; then
+			ac_cv_c_tclconfig="`(cd $i/win; pwd)`"
+			break
+		    fi
+		done
+	    fi
+
+	    # check in a few common install locations
+	    if test x"${ac_cv_c_tclconfig}" = x ; then
+		for i in `ls -d ${libdir} 2>/dev/null` \
+			`ls -d ${exec_prefix}/lib 2>/dev/null` \
+			`ls -d ${prefix}/lib 2>/dev/null` \
+			`ls -d /cygdrive/c/Tcl/lib 2>/dev/null` \
+			`ls -d /cygdrive/c/Progra~1/Tcl/lib 2>/dev/null` \
+			`ls -d /c/Tcl/lib 2>/dev/null` \
+			`ls -d /c/Progra~1/Tcl/lib 2>/dev/null` \
+			`ls -d C:/Tcl/lib 2>/dev/null` \
+			`ls -d C:/Progra~1/Tcl/lib 2>/dev/null` \
+			; do
+		    if test -f "$i/tclConfig.sh" ; then
+			ac_cv_c_tclconfig="`(cd $i; pwd)`"
+			break
+		    fi
+		done
+	    fi
+
+	    # check in a few other private locations
+	    if test x"${ac_cv_c_tclconfig}" = x ; then
+		for i in \
+			${srcdir}/../tcl \
+			`ls -dr ${srcdir}/../tcl[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ${srcdir}/../tcl[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ${srcdir}/../tcl[[8-9]].[[0-9]]* 2>/dev/null` ; do
+		    if test -f "$i/win/tclConfig.sh" ; then
+		    ac_cv_c_tclconfig="`(cd $i/win; pwd)`"
+		    break
+		fi
+		done
+	    fi
+	])
+
+	if test x"${ac_cv_c_tclconfig}" = x ; then
+	    TCL_BIN_DIR="# no Tcl configs found"
+	    AC_MSG_ERROR([Can't find Tcl configuration definitions. Use --with-tcl to specify a directory containing tclConfig.sh])
+	else
+	    no_tcl=
+	    TCL_BIN_DIR="${ac_cv_c_tclconfig}"
+	    AC_MSG_RESULT([found ${TCL_BIN_DIR}/tclConfig.sh])
 	fi
-	TCL_BIN_DIR=`cd ${TCL_BIN_DIR}/../unix; pwd`
     fi
-    AC_MSG_RESULT($TCL_BIN_DIR/tclConfig.sh)
 ])
 
 #------------------------------------------------------------------------
 # SC_PATH_TKCONFIG --
 #
 #	Locate the tkConfig.sh file
-#	Currently a no-op for Windows
 #
 # Arguments:
 #	none
@@ -56,31 +130,109 @@ AC_DEFUN([SC_PATH_TCLCONFIG], [
 #	Adds the following arguments to configure:
 #		--with-tk=...
 #
-#	Sets the following vars:
-#		TK_BIN_DIR	Full path to the tkConfig.sh file
+#	Defines the following vars:
+#		TK_BIN_DIR	Full path to the directory containing
+#				the tkConfig.sh file
 #------------------------------------------------------------------------
 
 AC_DEFUN([SC_PATH_TKCONFIG], [
-    AC_MSG_CHECKING([the location of tkConfig.sh])
+    #
+    # Ok, lets find the tk configuration
+    # First, look for one uninstalled.
+    # the alternative search directory is invoked by --with-tk
+    #
 
-    if test -d ../../tk8.6$1/win;  then
-	TK_BIN_DIR_DEFAULT=../../tk8.6$1/win
-    elif test -d ../../tk8.6/win;  then
-	TK_BIN_DIR_DEFAULT=../../tk8.6/win
-    else
-	TK_BIN_DIR_DEFAULT=../../tk/win
-    fi
+    if test x"${no_tk}" = x ; then
+	# we reset no_tk in case something fails here
+	no_tk=true
+	AC_ARG_WITH(tk,
+	    AC_HELP_STRING([--with-tk],
+		[directory containing tk configuration (tkConfig.sh)]),
+	    with_tkconfig="${withval}")
+	AC_MSG_CHECKING([for Tk configuration])
+	AC_CACHE_VAL(ac_cv_c_tkconfig,[
+
+	    # First check to see if --with-tkconfig was specified.
+	    if test x"${with_tkconfig}" != x ; then
+		case "${with_tkconfig}" in
+		    */tkConfig.sh )
+			if test -f "${with_tkconfig}"; then
+			    AC_MSG_WARN([--with-tk argument should refer to directory containing tkConfig.sh, not to tkConfig.sh itself])
+			    with_tkconfig="`echo "${with_tkconfig}" | sed 's!/tkConfig\.sh$!!'`"
+			fi ;;
+		esac
+		if test -f "${with_tkconfig}/tkConfig.sh" ; then
+		    ac_cv_c_tkconfig="`(cd "${with_tkconfig}"; pwd)`"
+		else
+		    AC_MSG_ERROR([${with_tkconfig} directory doesn't contain tkConfig.sh])
+		fi
+	    fi
 
-    AC_ARG_WITH(tk, [  --with-tk=DIR          use Tk 8.6 binaries from DIR],
-	    TK_BIN_DIR=$withval, TK_BIN_DIR=`cd $TK_BIN_DIR_DEFAULT; pwd`)
-    if test ! -d $TK_BIN_DIR; then
-	AC_MSG_ERROR(Tk directory $TK_BIN_DIR does not exist)
-    fi
-    if test ! -f $TK_BIN_DIR/tkConfig.sh; then
-	AC_MSG_ERROR(There is no tkConfig.sh in $TK_BIN_DIR:  perhaps you did not specify the Tk *build* directory (not the toplevel Tk directory) or you forgot to configure Tk?)
-    fi
+	    # then check for a private Tk library
+	    if test x"${ac_cv_c_tkconfig}" = x ; then
+		for i in \
+			../tk \
+			`ls -dr ../tk[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ../tk[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ../tk[[8-9]].[[0-9]]* 2>/dev/null` \
+			../../tk \
+			`ls -dr ../../tk[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ../../tk[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ../../tk[[8-9]].[[0-9]]* 2>/dev/null` \
+			../../../tk \
+			`ls -dr ../../../tk[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ../../../tk[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ../../../tk[[8-9]].[[0-9]]* 2>/dev/null` ; do
+		    if test -f "$i/win/tkConfig.sh" ; then
+			ac_cv_c_tkconfig="`(cd $i/win; pwd)`"
+			break
+		    fi
+		done
+	    fi
 
-    AC_MSG_RESULT([$TK_BIN_DIR/tkConfig.sh])
+	    # check in a few common install locations
+	    if test x"${ac_cv_c_tkconfig}" = x ; then
+		for i in `ls -d ${libdir} 2>/dev/null` \
+			`ls -d ${exec_prefix}/lib 2>/dev/null` \
+			`ls -d ${prefix}/lib 2>/dev/null` \
+			`ls -d /cygdrive/c/Tcl/lib 2>/dev/null` \
+			`ls -d /cygdrive/c/Progra~1/Tcl/lib 2>/dev/null` \
+			`ls -d /c/Tcl/lib 2>/dev/null` \
+			`ls -d /c/Progra~1/Tcl/lib 2>/dev/null` \
+			`ls -d C:/Tcl/lib 2>/dev/null` \
+			`ls -d C:/Progra~1/Tcl/lib 2>/dev/null` \
+			; do
+		    if test -f "$i/tkConfig.sh" ; then
+			ac_cv_c_tkconfig="`(cd $i; pwd)`"
+			break
+		    fi
+		done
+	    fi
+
+	    # check in a few other private locations
+	    if test x"${ac_cv_c_tkconfig}" = x ; then
+		for i in \
+			${srcdir}/../tk \
+			`ls -dr ${srcdir}/../tk[[8-9]].[[0-9]].[[0-9]]* 2>/dev/null` \
+			`ls -dr ${srcdir}/../tk[[8-9]].[[0-9]] 2>/dev/null` \
+			`ls -dr ${srcdir}/../tk[[8-9]].[[0-9]]* 2>/dev/null` ; do
+		    if test -f "$i/win/tkConfig.sh" ; then
+			ac_cv_c_tkconfig="`(cd $i/win; pwd)`"
+			break
+		    fi
+		done
+	    fi
+	])
+
+	if test x"${ac_cv_c_tkconfig}" = x ; then
+	    TK_BIN_DIR="# no Tk configs found"
+	    AC_MSG_ERROR([Can't find Tk configuration definitions. Use --with-tk to specify a directory containing tkConfig.sh])
+	else
+	    no_tk=
+	    TK_BIN_DIR="${ac_cv_c_tkconfig}"
+	    AC_MSG_RESULT([found ${TK_BIN_DIR}/tkConfig.sh])
+	fi
+    fi
 ])
 
 #------------------------------------------------------------------------
diff --git a/win/tclWinConsole.c b/win/tclWinConsole.c
index 5aab255..65e4aed 100644
--- a/win/tclWinConsole.c
+++ b/win/tclWinConsole.c
@@ -11,7 +11,6 @@
  */
 
 #include "tclWinInt.h"
-#include <sys/stat.h>
 
 /*
  * The following variable is used to tell whether this module has been
diff --git a/win/tclWinFile.c b/win/tclWinFile.c
index a4512ec..18b05d6 100644
--- a/win/tclWinFile.c
+++ b/win/tclWinFile.c
@@ -15,7 +15,6 @@
 #include "tclWinInt.h"
 #include "tclFileSystem.h"
 #include <winioctl.h>
-#include <sys/stat.h>
 #include <shlobj.h>
 #include <lm.h>		/* For TclpGetUserHome(). */
 
@@ -2476,6 +2475,12 @@ TclpObjNormalizePath(
 				}
 				Tcl_DStringAppend(&dsNorm, nativePath, len);
 				lastValidPathEnd = currentPathEndPosition;
+			    } else if (nextCheckpoint == 0) {
+				/* Path starts with a drive designation
+				 * that's not actually on the system.
+				 * We still must normalize up past the
+				 * first separator.  [Bug 3603434] */
+				currentPathEndPosition++;
 			    }
 			}
 			Tcl_DStringFree(&ds);
@@ -2616,6 +2621,12 @@ TclpObjNormalizePath(
 				    (const char *)nativePath,
 				    (int)(sizeof(WCHAR) * len));
 			    lastValidPathEnd = currentPathEndPosition;
+			} else if (nextCheckpoint == 0) {
+			    /* Path starts with a drive designation
+			     * that's not actually on the system.
+			     * We still must normalize up past the
+			     * first separator.  [Bug 3603434] */
+			    currentPathEndPosition++;
 			}
 		    }
 		    Tcl_DStringFree(&ds);
diff --git a/win/tclWinPipe.c b/win/tclWinPipe.c
index 36ae58a..d418a3e 100644
--- a/win/tclWinPipe.c
+++ b/win/tclWinPipe.c
@@ -12,8 +12,6 @@
 
 #include "tclWinInt.h"
 
-#include <sys/stat.h>
-
 /*
  * The following variable is used to tell whether this module has been
  * initialized.
diff --git a/win/tclWinSerial.c b/win/tclWinSerial.c
index 458b05b..75d5ffc 100644
--- a/win/tclWinSerial.c
+++ b/win/tclWinSerial.c
@@ -14,8 +14,6 @@
 
 #include "tclWinInt.h"
 
-#include <sys/stat.h>
-
 /*
  * The following variable is used to tell whether this module has been
  * initialized.
diff --git a/win/tclWinTest.c b/win/tclWinTest.c
index 136c4db..b83c0ba 100644
--- a/win/tclWinTest.c
+++ b/win/tclWinTest.c
@@ -211,7 +211,7 @@ TestvolumetypeCmd(
 	TclWinConvertError(GetLastError());
 	return TCL_ERROR;
     }
-    Tcl_SetResult(interp, volType, TCL_VOLATILE);
+    Tcl_AppendResult(interp, volType, NULL);
     return TCL_OK;
 #undef VOL_BUF_SIZE
 }
diff --git a/win/tclWinThrd.c b/win/tclWinThrd.c
index 7b0f6f8..1c9d483 100644
--- a/win/tclWinThrd.c
+++ b/win/tclWinThrd.c
@@ -14,7 +14,6 @@
 #include "tclWinInt.h"
 
 #include <float.h>
-#include <sys/stat.h>
 
 /* Workaround for mingw versions which don't provide this in float.h */
 #ifndef _MCW_EM