* generic/tclIO.c (SetChannelFromAny and related): Modified the

	* tests/io.test: internal representation of the tclChannelType to
	contain not only the ChannelState pointer, but also a reference to
	the interpreter it was made in. Invalidate and recompute the
	internal representation when it is used in a different interpreter
	(Like cmdName intrep's). Added testcase. [Bug 2407783].

3 files changed, 37 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index d622cfd..900e48f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2008-12-11  Andreas Kupries   <andreask@activestate.com>
+
+	* generic/tclIO.c (SetChannelFromAny and related): Modified the
+	* tests/io.test: internal representation of the tclChannelType to
+	contain not only the ChannelState pointer, but also a reference to
+	the interpreter it was made in. Invalidate and recompute the
+	internal representation when it is used in a different interpreter
+	(Like cmdName intrep's). Added testcase. [Bug 2407783].
+
 2008-12-11  Jan Nijtmans  <nijtmans@users.sf.net>
 
 	* library/clock.tcl (ProcessPosixTimeZone): Fallback to
diff --git a/generic/tclIO.c b/generic/tclIO.c
index 2e8b7dc..3553286 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclIO.c,v 1.137.2.9 2008/12/02 18:23:51 andreas_kupries Exp $
+ * RCS: @(#) $Id: tclIO.c,v 1.137.2.10 2008/12/11 17:27:39 andreas_kupries Exp $
  */
 
 #include "tclInt.h"
@@ -220,6 +220,10 @@ static Tcl_ObjType tclChannelType = {
     ((ChannelState *) (objPtr)->internalRep.otherValuePtr)
 #define SET_CHANNELSTATE(objPtr, storePtr) \
     ((objPtr)->internalRep.otherValuePtr = (void *) (storePtr))
+#define GET_CHANNELINTERP(objPtr) \
+    ((Interp *) (objPtr)->internalRep.twoPtrValue.ptr2)
+#define SET_CHANNELINTERP(objPtr, storePtr) \
+    ((objPtr)->internalRep.twoPtrValue.ptr2 = (void *) (storePtr))
 
 #define BUSY_STATE(st,fl) \
      ((((st)->csPtrR) && ((fl) & TCL_READABLE)) || \
@@ -10612,8 +10616,11 @@ DupChannelIntRep(
     register Tcl_Obj *copyPtr)	/* Object with internal rep to set. Must not
 				 * currently have an internal rep.*/
 {
-    ChannelState *statePtr = GET_CHANNELSTATE(srcPtr);
+    ChannelState *statePtr  = GET_CHANNELSTATE(srcPtr);
+    Interp       *interpPtr = GET_CHANNELINTERP(srcPtr);
+
     SET_CHANNELSTATE(copyPtr, statePtr);
+    SET_CHANNELINTERP(copyPtr, interpPtr);
     Tcl_Preserve((ClientData) statePtr);
     copyPtr->typePtr = &tclChannelType;
 }
@@ -10641,18 +10648,24 @@ SetChannelFromAny(
     register Tcl_Obj *objPtr)	/* The object to convert. */
 {
     ChannelState *statePtr;
+    Interp       *interpPtr;
 
     if (objPtr->typePtr == &tclChannelType) {
 	/*
 	 * The channel is valid until any call to DetachChannel occurs.
 	 * Ensure consistency checks are done.
 	 */
-	statePtr = GET_CHANNELSTATE(objPtr);
+	statePtr  = GET_CHANNELSTATE(objPtr);
+	interpPtr = GET_CHANNELINTERP(objPtr);
 	if (statePtr->flags & (CHANNEL_TAINTED|CHANNEL_CLOSED)) {
 	    ResetFlag(statePtr, CHANNEL_TAINTED);
 	    Tcl_Release((ClientData) statePtr);
 	    UpdateStringOfChannel(objPtr);
 	    objPtr->typePtr = NULL;
+	} else if (interpPtr != (Interp*) interp) {
+	    Tcl_Release((ClientData) statePtr);
+	    UpdateStringOfChannel(objPtr);
+	    objPtr->typePtr = NULL;
 	}
     }
     if (objPtr->typePtr != &tclChannelType) {
@@ -10675,6 +10688,7 @@ SetChannelFromAny(
 	statePtr = ((Channel *)chan)->state;
 	Tcl_Preserve((ClientData) statePtr);
 	SET_CHANNELSTATE(objPtr, statePtr);
+	SET_CHANNELINTERP(objPtr, interp);
 	objPtr->typePtr = &tclChannelType;
     }
     return TCL_OK;
diff --git a/tests/io.test b/tests/io.test
index a2aaf7f..2e21e5b 100644
--- a/tests/io.test
+++ b/tests/io.test
@@ -13,7 +13,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: io.test,v 1.80.2.12 2008/06/20 19:23:26 dgp Exp $
+# RCS: @(#) $Id: io.test,v 1.80.2.13 2008/12/11 17:27:39 andreas_kupries Exp $
 
 if {[catch {package require tcltest 2}]} {
     puts stderr "Skipping tests in [info script].  tcltest 2 required."
@@ -7695,6 +7695,16 @@ test io-73.1 {channel Tcl_Obj SetChannelFromAny} {} {
     catch {close [lreplace [list a] 0 end]}
 } {1}
 
+test io-73.2 {channel Tcl_Obj SetChannelFromAny, bug 2407783} {} {
+    # Invalidate intrep of 'channel' Tcl_Obj when transiting between interpreters.
+    interp create foo
+    set f [open [info script] r]
+    seek $f 0
+    set code [catch {interp eval foo [list seek $f 0]} msg]
+    # The string map converts the changing channel handle to a fixed string
+    list $code [string map [list $f @@] $msg]
+} {1 {can not find channel named "@@"}}
+
 # ### ### ### ######### ######### #########
 
 # cleanup