Burn the octal bridges. We're not goin' back.

16 files changed, 196 insertions, 342 deletions

diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index 36f87c0..54b1867 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -8438,16 +8438,7 @@ IllegalExprOperandType(
     }
 
     if (GetNumberFromObj(NULL, opndPtr, &ptr, &type) != TCL_OK) {
-	int numBytes;
-	const char *bytes = Tcl_GetStringFromObj(opndPtr, &numBytes);
-
-	if (numBytes == 0) {
-	    description = "empty string";
-	} else if (TclCheckBadOctal(NULL, bytes)) {
-	    description = "invalid octal number";
-	} else {
-	    description = "non-numeric string";
-	}
+	description = "non-numeric string";
     } else if (type == TCL_NUMBER_NAN) {
 	description = "non-numeric floating-point value";
     } else if (type == TCL_NUMBER_DOUBLE) {
@@ -8458,7 +8449,8 @@ IllegalExprOperandType(
     }
 
     Tcl_SetObjResult(interp, Tcl_ObjPrintf(
-	    "can't use %s as operand of \"%s\"", description, operator));
+	    "can't use %s \"%s\" as operand of \"%s\"", description,
+	    Tcl_GetString(opndPtr), operator));
     Tcl_SetErrorCode(interp, "ARITH", "DOMAIN", description, NULL);
 }
 
diff --git a/generic/tclInt.h b/generic/tclInt.h
index b328d56..d548a16 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -2904,8 +2904,6 @@ MODULE_SCOPE int	TclByteArrayMatch(const unsigned char *string,
 			    int strLen, const unsigned char *pattern,
 			    int ptnLen, int flags);
 MODULE_SCOPE double	TclCeil(const mp_int *a);
-MODULE_SCOPE int	TclCheckBadOctal(Tcl_Interp *interp,
-			    const char *value);
 MODULE_SCOPE int	TclChanCaughtErrorBypass(Tcl_Interp *interp,
 			    Tcl_Channel chan);
 MODULE_SCOPE Tcl_ObjCmdProc TclChannelNamesCmd;
diff --git a/generic/tclStrToD.c b/generic/tclStrToD.c
index 1a47304..9f81c13 100755
--- a/generic/tclStrToD.c
+++ b/generic/tclStrToD.c
@@ -18,13 +18,6 @@
 #include <math.h>
 
 /*
- * Define KILL_OCTAL to suppress interpretation of numbers with leading zero
- * as octal. (Ceterum censeo: numeros octonarios delendos esse.)
- */
-
-#define KILL_OCTAL
-
-/*
  * This code supports (at least hypothetically), IBM, Cray, VAX and IEEE-754
  * floating point; of these, only IEEE-754 can represent NaN. IEEE-754 can be
  * uniquely determined by radix and by the widths of significand and exponent.
@@ -487,7 +480,7 @@ TclParseNumber(
     enum State {
 	INITIAL, SIGNUM, ZERO, ZERO_X,
 	ZERO_O, ZERO_B, BINARY,
-	HEXADECIMAL, OCTAL, BAD_OCTAL, DECIMAL,
+	HEXADECIMAL, OCTAL, DECIMAL,
 	LEADING_RADIX_POINT, FRACTION,
 	EXPONENT_START, EXPONENT_SIGNUM, EXPONENT,
 	sI, sIN, sINF, sINFI, sINFIN, sINFINI, sINFINIT, sINFINITY
@@ -648,10 +641,7 @@ TclParseNumber(
 		state = ZERO_O;
 		break;
 	    }
-#ifdef KILL_OCTAL
 	    goto decimal;
-#endif
-	    /* FALLTHROUGH */
 
 	case OCTAL:
 	    /*
@@ -714,58 +704,6 @@ TclParseNumber(
 		state = OCTAL;
 		break;
 	    }
-	    /* FALLTHROUGH */
-
-	case BAD_OCTAL:
-	    if (explicitOctal) {
-		/*
-		 * No forgiveness for bad digits in explicitly octal numbers.
-		 */
-
-		goto endgame;
-	    }
-	    if (flags & TCL_PARSE_INTEGER_ONLY) {
-		/*
-		 * No seeking floating point when parsing only integer.
-		 */
-
-		goto endgame;
-	    }
-#ifndef KILL_OCTAL
-
-	    /*
-	     * Scanned a number with a leading zero that contains an 8, 9,
-	     * radix point or E. This is an invalid octal number, but might
-	     * still be floating point.
-	     */
-
-	    if (c == '0') {
-		numTrailZeros++;
-		state = BAD_OCTAL;
-		break;
-	    } else if (isdigit(UCHAR(c))) {
-		if (objPtr != NULL) {
-		    significandOverflow = AccumulateDecimalDigit(
-			    (unsigned)(c-'0'), numTrailZeros,
-			    &significandWide, &significandBig,
-			    significandOverflow);
-		}
-		if (numSigDigs != 0) {
-		    numSigDigs += (numTrailZeros + 1);
-		} else {
-		    numSigDigs = 1;
-		}
-		numTrailZeros = 0;
-		state = BAD_OCTAL;
-		break;
-	    } else if (c == '.') {
-		state = FRACTION;
-		break;
-	    } else if (c == 'E' || c == 'e') {
-		state = EXPONENT_START;
-		break;
-	    }
-#endif
 	    goto endgame;
 
 	    /*
@@ -870,9 +808,7 @@ TclParseNumber(
 	     * digits.
 	     */
 
-#ifdef KILL_OCTAL
 	decimal:
-#endif
 	    acceptState = state;
 	    acceptPoint = p;
 	    acceptLen = len;
@@ -1156,7 +1092,6 @@ TclParseNumber(
 	TclFreeIntRep(objPtr);
 	switch (acceptState) {
 	case SIGNUM:
-	case BAD_OCTAL:
 	case ZERO_X:
 	case ZERO_O:
 	case ZERO_B:
@@ -1381,9 +1316,6 @@ TclParseNumber(
 
 	    Tcl_AppendLimitedToObj(msg, bytes, numBytes, 50, "");
 	    Tcl_AppendToObj(msg, "\"", -1);
-	    if (state == BAD_OCTAL) {
-		Tcl_AppendToObj(msg, " (looks like invalid octal number)", -1);
-	    }
 	    Tcl_SetObjResult(interp, msg);
 	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "NUMBER", NULL);
 	}
diff --git a/generic/tclUtil.c b/generic/tclUtil.c
index 40073d3..4e92772 100644
--- a/generic/tclUtil.c
+++ b/generic/tclUtil.c
@@ -3546,7 +3546,6 @@ TclGetIntForIndex(
 	if (!strncmp(bytes, "end-", 4)) {
 	    bytes += 4;
 	}
-	TclCheckBadOctal(interp, bytes);
 	Tcl_SetErrorCode(interp, "TCL", "VALUE", "INDEX", NULL);
     }
 
@@ -3691,73 +3690,6 @@ SetEndOffsetFromAny(
 /*
  *----------------------------------------------------------------------
  *
- * TclCheckBadOctal --
- *
- *	This function checks for a bad octal value and appends a meaningful
- *	error to the interp's result.
- *
- * Results:
- *	1 if the argument was a bad octal, else 0.
- *
- * Side effects:
- *	The interpreter's result is modified.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCheckBadOctal(
-    Tcl_Interp *interp,		/* Interpreter to use for error reporting. If
-				 * NULL, then no error message is left after
-				 * errors. */
-    const char *value)		/* String to check. */
-{
-    register const char *p = value;
-
-    /*
-     * A frequent mistake is invalid octal values due to an unwanted leading
-     * zero. Try to generate a meaningful error message.
-     */
-
-    while (TclIsSpaceProc(*p)) {
-	p++;
-    }
-    if (*p == '+' || *p == '-') {
-	p++;
-    }
-    if (*p == '0') {
-	if ((p[1] == 'o') || p[1] == 'O') {
-	    p += 2;
-	}
-	while (isdigit(UCHAR(*p))) {	/* INTL: digit. */
-	    p++;
-	}
-	while (TclIsSpaceProc(*p)) {
-	    p++;
-	}
-	if (*p == '\0') {
-	    /*
-	     * Reached end of string.
-	     */
-
-	    if (interp != NULL) {
-		/*
-		 * Don't reset the result here because we want this result to
-		 * be added to an existing error message as extra info.
-		 */
-
-		Tcl_AppendToObj(Tcl_GetObjResult(interp),
-			" (looks like invalid octal number)", -1);
-	    }
-	    return 1;
-	}
-    }
-    return 0;
-}
-
-/*
- *----------------------------------------------------------------------
- *
  * ClearHash --
  *
  *	Remove all the entries in the hash table *tablePtr.
diff --git a/tests/assemble.test b/tests/assemble.test
index 7d4e5d1..942b763 100644
--- a/tests/assemble.test
+++ b/tests/assemble.test
@@ -782,7 +782,7 @@ test assemble-7.43 {uplus} {
 	}
     }
     -returnCodes error
-    -result {can't use non-numeric floating-point value as operand of "+"}
+    -result {can't use non-numeric floating-point value "NaN" as operand of "+"}
 }
 test assemble-7.43.1 {tryCvtToNumeric} {
     -body {
diff --git a/tests/compExpr-old.test b/tests/compExpr-old.test
index 4664b7a..774060d 100644
--- a/tests/compExpr-old.test
+++ b/tests/compExpr-old.test
@@ -278,10 +278,10 @@ test compExpr-old-6.8 {CompileBitXorExpr: error compiling bitxor arm} -body {
 } -returnCodes error -match glob -result *
 test compExpr-old-6.9 {CompileBitXorExpr: runtime error in bitxor arm} {
     list [catch {expr {24.0^3}} msg] $msg
-} {1 {can't use floating-point value as operand of "^"}}
+} {1 {can't use floating-point value "24.0" as operand of "^"}}
 test compExpr-old-6.10 {CompileBitXorExpr: runtime error in bitxor arm} {
     list [catch {expr {"a"^"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "^"}}
+} {1 {can't use non-numeric string "a" as operand of "^"}}
 
 test compExpr-old-7.1 {CompileBitAndExpr: just equality expr} {expr 3==2} 0
 test compExpr-old-7.2 {CompileBitAndExpr: just equality expr} {expr 2.0==2} 1
@@ -302,10 +302,10 @@ test compExpr-old-7.11 {CompileBitAndExpr: error compiling bitand arm} -body {
 } -returnCodes error -match glob -result *
 test compExpr-old-7.12 {CompileBitAndExpr: runtime error in bitand arm} {
     list [catch {expr {24.0&3}} msg] $msg
-} {1 {can't use floating-point value as operand of "&"}}
+} {1 {can't use floating-point value "24.0" as operand of "&"}}
 test compExpr-old-7.13 {CompileBitAndExpr: runtime error in bitand arm} {
     list [catch {expr {"a"&"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "&"}}
+} {1 {can't use non-numeric string "a" as operand of "&"}}
 
 test compExpr-old-8.1 {CompileEqualityExpr: just relational expr} {expr 3>=2} 1
 test compExpr-old-8.2 {CompileEqualityExpr: just relational expr} {expr 2<=2.1} 1
@@ -370,10 +370,10 @@ test compExpr-old-10.9 {CompileShiftExpr: error compiling shift arm} -body {
 } -returnCodes error -match glob -result *
 test compExpr-old-10.10 {CompileShiftExpr: runtime error} {
     list [catch {expr {24.0>>43}} msg] $msg
-} {1 {can't use floating-point value as operand of ">>"}}
+} {1 {can't use floating-point value "24.0" as operand of ">>"}}
 test compExpr-old-10.11 {CompileShiftExpr: runtime error} {
     list [catch {expr {"a"<<"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "<<"}}
+} {1 {can't use non-numeric string "a" as operand of "<<"}}
 
 test compExpr-old-11.1 {CompileAddExpr: just multiply expr} {expr 4*-2} -8
 test compExpr-old-11.2 {CompileAddExpr: just multiply expr} {expr 0xff%2} 1
@@ -392,10 +392,10 @@ test compExpr-old-11.9 {CompileAddExpr: error compiling add arm} -body {
 } -returnCodes error -match glob -result *
 test compExpr-old-11.10 {CompileAddExpr: runtime error} {
     list [catch {expr {24.0+"xx"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "xx" as operand of "+"}}
 test compExpr-old-11.11 {CompileAddExpr: runtime error} {
     list [catch {expr {"a"-"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "-"}}
+} {1 {can't use non-numeric string "a" as operand of "-"}}
 test compExpr-old-11.12 {CompileAddExpr: runtime error} {
     list [catch {expr {3/0}} msg] $msg
 } {1 {divide by zero}}
@@ -423,10 +423,10 @@ test compExpr-old-12.9 {CompileMultiplyExpr: error compiling multiply arm} -body
 } -returnCodes error -match glob -result *
 test compExpr-old-12.10 {CompileMultiplyExpr: runtime error} {
     list [catch {expr {24.0*"xx"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "*"}}
+} {1 {can't use non-numeric string "xx" as operand of "*"}}
 test compExpr-old-12.11 {CompileMultiplyExpr: runtime error} {
     list [catch {expr {"a"/"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "/"}}
+} {1 {can't use non-numeric string "a" as operand of "/"}}
 
 test compExpr-old-13.1 {CompileUnaryExpr: unary exprs} {expr -0xff} -255
 test compExpr-old-13.2 {CompileUnaryExpr: unary exprs} {expr +0o00123} 83
@@ -444,10 +444,10 @@ test compExpr-old-13.9 {CompileUnaryExpr: error compiling unary expr} -body {
 } -returnCodes error -match glob -result *
 test compExpr-old-13.10 {CompileUnaryExpr: runtime error} {
     list [catch {expr {~"xx"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "~"}}
+} {1 {can't use non-numeric string "xx" as operand of "~"}}
 test compExpr-old-13.11 {CompileUnaryExpr: runtime error} {
     list [catch {expr ~4.0} msg] $msg
-} {1 {can't use floating-point value as operand of "~"}}
+} {1 {can't use floating-point value "4.0" as operand of "~"}}
 test compExpr-old-13.12 {CompileUnaryExpr: just primary expr} {expr 0x123} 291
 test compExpr-old-13.13 {CompileUnaryExpr: just primary expr} {
     set a 27
diff --git a/tests/compile.test b/tests/compile.test
index 4d91940..d276460 100644
--- a/tests/compile.test
+++ b/tests/compile.test
@@ -282,7 +282,7 @@ test compile-11.2 {Tcl_Append*: ensure Tcl_ResetResult is used properly} -body {
 } -returnCodes error -result {bad index "bogus": must be integer?[+-]integer? or end?[+-]integer?}
 test compile-11.3 {Tcl_Append*: ensure Tcl_ResetResult is used properly} -body {
     apply {{} { set r [list foobar] ; string index a 0o9 }}
-} -returnCodes error -match glob -result {*invalid octal number*}
+} -returnCodes error -match glob -result {*}
 test compile-11.4 {Tcl_Append*: ensure Tcl_ResetResult is used properly} -body {
     apply {{} { set r [list foobar] ; array set var {one two many} }}
 } -returnCodes error -result {list must have an even number of elements}
diff --git a/tests/execute.test b/tests/execute.test
index 94af158..e0b68e5 100644
--- a/tests/execute.test
+++ b/tests/execute.test
@@ -174,7 +174,7 @@ test execute-3.5 {TclExecuteByteCode, INST_ADD, op1 is string double} {testobj}
 test execute-3.6 {TclExecuteByteCode, INST_ADD, op1 is non-numeric} {testobj} {
     set x [teststringobj set 0 foo]
     list [catch {expr {$x + 1}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "foo" as operand of "+"}}
 test execute-3.7 {TclExecuteByteCode, INST_ADD, op2 is int} {testobj} {
     set x [testintobj set 0 1]
     expr {1 + $x}
@@ -199,7 +199,7 @@ test execute-3.11 {TclExecuteByteCode, INST_ADD, op2 is string double} {testobj}
 test execute-3.12 {TclExecuteByteCode, INST_ADD, op2 is non-numeric} {testobj} {
     set x [teststringobj set 0 foo]
     list [catch {expr {1 + $x}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "foo" as operand of "+"}}
 
 # INST_SUB is partially tested:
 test execute-3.13 {TclExecuteByteCode, INST_SUB, op1 is int} {testobj} {
@@ -226,7 +226,7 @@ test execute-3.17 {TclExecuteByteCode, INST_SUB, op1 is string double} {testobj}
 test execute-3.18 {TclExecuteByteCode, INST_SUB, op1 is non-numeric} {testobj} {
     set x [teststringobj set 0 foo]
     list [catch {expr {$x - 1}} msg] $msg
-} {1 {can't use non-numeric string as operand of "-"}}
+} {1 {can't use non-numeric string "foo" as operand of "-"}}
 test execute-3.19 {TclExecuteByteCode, INST_SUB, op2 is int} {testobj} {
     set x [testintobj set 0 1]
     expr {1 - $x}
@@ -251,7 +251,7 @@ test execute-3.23 {TclExecuteByteCode, INST_SUB, op2 is string double} {testobj}
 test execute-3.24 {TclExecuteByteCode, INST_SUB, op2 is non-numeric} {testobj} {
     set x [teststringobj set 0 foo]
     list [catch {expr {1 - $x}} msg] $msg
-} {1 {can't use non-numeric string as operand of "-"}}
+} {1 {can't use non-numeric string "foo" as operand of "-"}}
 
 # INST_MULT is partially tested:
 test execute-3.25 {TclExecuteByteCode, INST_MULT, op1 is int} {testobj} {
@@ -278,7 +278,7 @@ test execute-3.29 {TclExecuteByteCode, INST_MULT, op1 is string double} {testobj
 test execute-3.30 {TclExecuteByteCode, INST_MULT, op1 is non-numeric} {testobj} {
     set x [teststringobj set 1 foo]
     list [catch {expr {$x * 1}} msg] $msg
-} {1 {can't use non-numeric string as operand of "*"}}
+} {1 {can't use non-numeric string "foo" as operand of "*"}}
 test execute-3.31 {TclExecuteByteCode, INST_MULT, op2 is int} {testobj} {
     set x [testintobj set 1 1]
     expr {1 * $x}
@@ -303,7 +303,7 @@ test execute-3.35 {TclExecuteByteCode, INST_MULT, op2 is string double} {testobj
 test execute-3.36 {TclExecuteByteCode, INST_MULT, op2 is non-numeric} {testobj} {
     set x [teststringobj set 1 foo]
     list [catch {expr {1 * $x}} msg] $msg
-} {1 {can't use non-numeric string as operand of "*"}}
+} {1 {can't use non-numeric string "foo" as operand of "*"}}
 
 # INST_DIV is partially tested:
 test execute-3.37 {TclExecuteByteCode, INST_DIV, op1 is int} {testobj} {
@@ -330,7 +330,7 @@ test execute-3.41 {TclExecuteByteCode, INST_DIV, op1 is string double} {testobj}
 test execute-3.42 {TclExecuteByteCode, INST_DIV, op1 is non-numeric} {testobj} {
     set x [teststringobj set 1 foo]
     list [catch {expr {$x / 1}} msg] $msg
-} {1 {can't use non-numeric string as operand of "/"}}
+} {1 {can't use non-numeric string "foo" as operand of "/"}}
 test execute-3.43 {TclExecuteByteCode, INST_DIV, op2 is int} {testobj} {
     set x [testintobj set 1 1]
     expr {2 / $x}
@@ -355,7 +355,7 @@ test execute-3.47 {TclExecuteByteCode, INST_DIV, op2 is string double} {testobj}
 test execute-3.48 {TclExecuteByteCode, INST_DIV, op2 is non-numeric} {testobj} {
     set x [teststringobj set 1 foo]
     list [catch {expr {1 / $x}} msg] $msg
-} {1 {can't use non-numeric string as operand of "/"}}
+} {1 {can't use non-numeric string "foo" as operand of "/"}}
 
 # INST_UPLUS is partially tested:
 test execute-3.49 {TclExecuteByteCode, INST_UPLUS, op is int} {testobj} {
@@ -382,7 +382,7 @@ test execute-3.53 {TclExecuteByteCode, INST_UPLUS, op is string double} {testobj
 test execute-3.54 {TclExecuteByteCode, INST_UPLUS, op is non-numeric} {testobj} {
     set x [teststringobj set 1 foo]
     list [catch {expr {+ $x}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "foo" as operand of "+"}}
 
 # INST_UMINUS is partially tested:
 test execute-3.55 {TclExecuteByteCode, INST_UMINUS, op is int} {testobj} {
@@ -409,7 +409,7 @@ test execute-3.59 {TclExecuteByteCode, INST_UMINUS, op is string double} {testob
 test execute-3.60 {TclExecuteByteCode, INST_UMINUS, op is non-numeric} {testobj} {
     set x [teststringobj set 1 foo]
     list [catch {expr {- $x}} msg] $msg
-} {1 {can't use non-numeric string as operand of "-"}}
+} {1 {can't use non-numeric string "foo" as operand of "-"}}
 
 # INST_LNOT is partially tested:
 test execute-3.61 {TclExecuteByteCode, INST_LNOT, op is int} {testobj} {
@@ -457,7 +457,7 @@ test execute-3.70 {TclExecuteByteCode, INST_LNOT, op is string double} {testobj}
 test execute-3.71 {TclExecuteByteCode, INST_LNOT, op is non-numeric} {testobj} {
     set x [teststringobj set 1 foo]
     list [catch {expr {! $x}} msg] $msg
-} {1 {can't use non-numeric string as operand of "!"}}
+} {1 {can't use non-numeric string "foo" as operand of "!"}}
 
 # INST_BITNOT not tested
 # INST_CALL_BUILTIN_FUNC1 not tested
diff --git a/tests/expr-old.test b/tests/expr-old.test
index e6808c6..ed0f11f 100644
--- a/tests/expr-old.test
+++ b/tests/expr-old.test
@@ -193,34 +193,34 @@ test expr-old-2.38 {floating-point operators} {
 
 test expr-old-3.1 {illegal floating-point operations} {
     list [catch {expr ~4.0} msg] $msg
-} {1 {can't use floating-point value as operand of "~"}}
+} {1 {can't use floating-point value "4.0" as operand of "~"}}
 test expr-old-3.2 {illegal floating-point operations} {
     list [catch {expr 27%4.0} msg] $msg
-} {1 {can't use floating-point value as operand of "%"}}
+} {1 {can't use floating-point value "4.0" as operand of "%"}}
 test expr-old-3.3 {illegal floating-point operations} {
     list [catch {expr 27.0%4} msg] $msg
-} {1 {can't use floating-point value as operand of "%"}}
+} {1 {can't use floating-point value "27.0" as operand of "%"}}
 test expr-old-3.4 {illegal floating-point operations} {
     list [catch {expr 1.0<<3} msg] $msg
-} {1 {can't use floating-point value as operand of "<<"}}
+} {1 {can't use floating-point value "1.0" as operand of "<<"}}
 test expr-old-3.5 {illegal floating-point operations} {
     list [catch {expr 3<<1.0} msg] $msg
-} {1 {can't use floating-point value as operand of "<<"}}
+} {1 {can't use floating-point value "1.0" as operand of "<<"}}
 test expr-old-3.6 {illegal floating-point operations} {
     list [catch {expr 24.0>>3} msg] $msg
-} {1 {can't use floating-point value as operand of ">>"}}
+} {1 {can't use floating-point value "24.0" as operand of ">>"}}
 test expr-old-3.7 {illegal floating-point operations} {
     list [catch {expr 24>>3.0} msg] $msg
-} {1 {can't use floating-point value as operand of ">>"}}
+} {1 {can't use floating-point value "3.0" as operand of ">>"}}
 test expr-old-3.8 {illegal floating-point operations} {
     list [catch {expr 24&3.0} msg] $msg
-} {1 {can't use floating-point value as operand of "&"}}
+} {1 {can't use floating-point value "3.0" as operand of "&"}}
 test expr-old-3.9 {illegal floating-point operations} {
     list [catch {expr 24.0|3} msg] $msg
-} {1 {can't use floating-point value as operand of "|"}}
+} {1 {can't use floating-point value "24.0" as operand of "|"}}
 test expr-old-3.10 {illegal floating-point operations} {
     list [catch {expr 24.0^3} msg] $msg
-} {1 {can't use floating-point value as operand of "^"}}
+} {1 {can't use floating-point value "24.0" as operand of "^"}}
 
 # Check the string operators individually.
 
@@ -261,46 +261,46 @@ test expr-old-4.32 {string operators} {expr {0?"foo":"bar"}} bar
 
 test expr-old-5.1 {illegal string operations} {
     list [catch {expr {-"a"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "-"}}
+} {1 {can't use non-numeric string "a" as operand of "-"}}
 test expr-old-5.2 {illegal string operations} {
     list [catch {expr {+"a"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "a" as operand of "+"}}
 test expr-old-5.3 {illegal string operations} {
     list [catch {expr {~"a"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "~"}}
+} {1 {can't use non-numeric string "a" as operand of "~"}}
 test expr-old-5.4 {illegal string operations} {
     list [catch {expr {!"a"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "!"}}
+} {1 {can't use non-numeric string "a" as operand of "!"}}
 test expr-old-5.5 {illegal string operations} {
     list [catch {expr {"a"*"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "*"}}
+} {1 {can't use non-numeric string "a" as operand of "*"}}
 test expr-old-5.6 {illegal string operations} {
     list [catch {expr {"a"/"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "/"}}
+} {1 {can't use non-numeric string "a" as operand of "/"}}
 test expr-old-5.7 {illegal string operations} {
     list [catch {expr {"a"%"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "%"}}
+} {1 {can't use non-numeric string "a" as operand of "%"}}
 test expr-old-5.8 {illegal string operations} {
     list [catch {expr {"a"+"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "a" as operand of "+"}}
 test expr-old-5.9 {illegal string operations} {
     list [catch {expr {"a"-"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "-"}}
+} {1 {can't use non-numeric string "a" as operand of "-"}}
 test expr-old-5.10 {illegal string operations} {
     list [catch {expr {"a"<<"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "<<"}}
+} {1 {can't use non-numeric string "a" as operand of "<<"}}
 test expr-old-5.11 {illegal string operations} {
     list [catch {expr {"a">>"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of ">>"}}
+} {1 {can't use non-numeric string "a" as operand of ">>"}}
 test expr-old-5.12 {illegal string operations} {
     list [catch {expr {"a"&"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "&"}}
+} {1 {can't use non-numeric string "a" as operand of "&"}}
 test expr-old-5.13 {illegal string operations} {
     list [catch {expr {"a"^"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "^"}}
+} {1 {can't use non-numeric string "a" as operand of "^"}}
 test expr-old-5.14 {illegal string operations} {
     list [catch {expr {"a"|"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "|"}}
+} {1 {can't use non-numeric string "a" as operand of "|"}}
 test expr-old-5.15 {illegal string operations} {
     list [catch {expr {"a"&&"b"}} msg] $msg
 } {1 {expected boolean value but got "a"}}
@@ -489,7 +489,7 @@ test expr-old-25.20 {type conversions} {expr 10.0} 10.0
 
 test expr-old-26.1 {error conditions} {
     list [catch {expr 2+"a"} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "a" as operand of "+"}}
 test expr-old-26.2 {error conditions} -body {
     expr 2+4*
 } -returnCodes error -match glob -result *
@@ -503,10 +503,10 @@ test expr-old-26.4 {error conditions} {
 set a xx
 test expr-old-26.5 {error conditions} {
     list [catch {expr {2+$a}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "xx" as operand of "+"}}
 test expr-old-26.6 {error conditions} {
     list [catch {expr {2+[set a]}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "xx" as operand of "+"}}
 test expr-old-26.7 {error conditions} -body {
     expr {2+(4}
 } -returnCodes error -match glob -result *
@@ -530,7 +530,7 @@ test expr-old-26.12 {error conditions} -body {
 } -returnCodes error -match glob -result *
 test expr-old-26.13 {error conditions} {
     list [catch {expr {"a"/"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "/"}}
+} {1 {can't use non-numeric string "a" as operand of "/"}}
 test expr-old-26.14 {error conditions} -body {
     expr 2:3
 } -returnCodes error -match glob -result *
@@ -949,7 +949,7 @@ test expr-old-36.1 {ExprLooksLikeInt procedure} -body {
 test expr-old-36.2 {ExprLooksLikeInt procedure} {
     set x 0o289
     list [catch {expr {$x+1}} msg] $msg
-} {1 {can't use invalid octal number as operand of "+"}}
+} {1 {can't use non-numeric string "0o289" as operand of "+"}}
 test expr-old-36.3 {ExprLooksLikeInt procedure} {
     list [catch {expr 0289.1} msg] $msg
 } {0 289.1}
@@ -989,11 +989,11 @@ test expr-old-36.11 {ExprLooksLikeInt procedure} {
 test expr-old-36.12 {ExprLooksLikeInt procedure} {
     set x "10;"
     list [catch {expr {$x+1}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "10;" as operand of "+"}}
 test expr-old-36.13 {ExprLooksLikeInt procedure} {
     set x " +"
     list [catch {expr {$x+1}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string " +" as operand of "+"}}
 test expr-old-36.14 {ExprLooksLikeInt procedure} {
     set x "123456789012345678901234567890 "
     expr {$x+1}
@@ -1001,7 +1001,7 @@ test expr-old-36.14 {ExprLooksLikeInt procedure} {
 test expr-old-36.15 {ExprLooksLikeInt procedure} {
     set x "0o99 "
     list [catch {expr {$x+1}} msg] $msg
-} {1 {can't use invalid octal number as operand of "+"}}
+} {1 {can't use non-numeric string "0o99 " as operand of "+"}}
 test expr-old-36.16 {ExprLooksLikeInt procedure} {
     set x " 0xffffffffffffffffffffffffffffffffffffff  "
     expr {$x+1}
diff --git a/tests/expr.test b/tests/expr.test
index 813812d..29fb967 100644
--- a/tests/expr.test
+++ b/tests/expr.test
@@ -252,7 +252,7 @@ test expr-4.9 {CompileLorExpr: long lor arm} {
 } 1
 test expr-4.10 {CompileLorExpr: error compiling ! operand} {
     list [catch {expr {!"a"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "!"}}
+} {1 {can't use non-numeric string "a" as operand of "!"}}
 test expr-4.11 {CompileLorExpr: error compiling land arms} {
     list [catch {expr {"a"||0}} msg] $msg
 } {1 {expected boolean value but got "a"}}
@@ -299,10 +299,10 @@ test expr-6.8 {CompileBitXorExpr: error compiling bitxor arm} -body {
 } -returnCodes error -match glob -result *
 test expr-6.9 {CompileBitXorExpr: runtime error in bitxor arm} {
     list [catch {expr {24.0^3}} msg] $msg
-} {1 {can't use floating-point value as operand of "^"}}
+} {1 {can't use floating-point value "24.0" as operand of "^"}}
 test expr-6.10 {CompileBitXorExpr: runtime error in bitxor arm} {
     list [catch {expr {"a"^"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "^"}}
+} {1 {can't use non-numeric string "a" as operand of "^"}}
 
 test expr-7.1 {CompileBitAndExpr: just equality expr} {expr 3==2} 0
 test expr-7.2 {CompileBitAndExpr: just equality expr} {expr 2.0==2} 1
@@ -323,10 +323,10 @@ test expr-7.11 {CompileBitAndExpr: error compiling bitand arm} -body {
 } -returnCodes error -match glob -result *
 test expr-7.12 {CompileBitAndExpr: runtime error in bitand arm} {
     list [catch {expr {24.0&3}} msg] $msg
-} {1 {can't use floating-point value as operand of "&"}}
+} {1 {can't use floating-point value "24.0" as operand of "&"}}
 test expr-7.13 {CompileBitAndExpr: runtime error in bitand arm} {
     list [catch {expr {"a"&"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "&"}}
+} {1 {can't use non-numeric string "a" as operand of "&"}}
 test expr-7.14 {CompileBitAndExpr: equality expr} {expr 3eq2} 0
 test expr-7.18 {CompileBitAndExpr: equality expr} {expr {"abc" eq "abd"}} 0
 test expr-7.20 {CompileBitAndExpr: error in equality expr} -body {
@@ -451,10 +451,10 @@ test expr-10.9 {CompileShiftExpr: error compiling shift arm} -body {
 } -returnCodes error -match glob -result *
 test expr-10.10 {CompileShiftExpr: runtime error} {
     list [catch {expr {24.0>>43}} msg] $msg
-} {1 {can't use floating-point value as operand of ">>"}}
+} {1 {can't use floating-point value "24.0" as operand of ">>"}}
 test expr-10.11 {CompileShiftExpr: runtime error} {
     list [catch {expr {"a"<<"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "<<"}}
+} {1 {can't use non-numeric string "a" as operand of "<<"}}
 
 test expr-11.1 {CompileAddExpr: just multiply expr} {expr 4*-2} -8
 test expr-11.2 {CompileAddExpr: just multiply expr} {expr 0xff%2} 1
@@ -473,10 +473,10 @@ test expr-11.9 {CompileAddExpr: error compiling add arm} -body {
 } -returnCodes error -match glob -result *
 test expr-11.10 {CompileAddExpr: runtime error} {
     list [catch {expr {24.0+"xx"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "xx" as operand of "+"}}
 test expr-11.11 {CompileAddExpr: runtime error} {
     list [catch {expr {"a"-"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "-"}}
+} {1 {can't use non-numeric string "a" as operand of "-"}}
 test expr-11.12 {CompileAddExpr: runtime error} {
     list [catch {expr {3/0}} msg] $msg
 } {1 {divide by zero}}
@@ -504,10 +504,10 @@ test expr-12.9 {CompileMultiplyExpr: error compiling multiply arm} -body {
 } -returnCodes error -match glob -result *
 test expr-12.10 {CompileMultiplyExpr: runtime error} {
     list [catch {expr {24.0*"xx"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "*"}}
+} {1 {can't use non-numeric string "xx" as operand of "*"}}
 test expr-12.11 {CompileMultiplyExpr: runtime error} {
     list [catch {expr {"a"/"b"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "/"}}
+} {1 {can't use non-numeric string "a" as operand of "/"}}
 
 test expr-13.1 {CompileUnaryExpr: unary exprs} {expr -0xff} -255
 test expr-13.2 {CompileUnaryExpr: unary exprs} {expr +0o00123} 83
@@ -524,10 +524,10 @@ test expr-13.9 {CompileUnaryExpr: error compiling unary expr} -body {
 } -returnCodes error -match glob -result *
 test expr-13.10 {CompileUnaryExpr: runtime error} {
     list [catch {expr {~"xx"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "~"}}
+} {1 {can't use non-numeric string "xx" as operand of "~"}}
 test expr-13.11 {CompileUnaryExpr: runtime error} {
     list [catch {expr ~4.0} msg] $msg
-} {1 {can't use floating-point value as operand of "~"}}
+} {1 {can't use floating-point value "4.0" as operand of "~"}}
 test expr-13.12 {CompileUnaryExpr: just primary expr} {expr 0x123} 291
 test expr-13.13 {CompileUnaryExpr: just primary expr} {
     set a 27
@@ -804,15 +804,15 @@ test expr-21.13 {non-numeric boolean literals} -body {
 } -returnCodes error -match glob -result *
 test expr-21.14 {non-numeric boolean literals} {
     list [catch {expr !"truef"} err] $err
-} {1 {can't use non-numeric string as operand of "!"}}
+} {1 {can't use non-numeric string "truef" as operand of "!"}}
 test expr-21.15 {non-numeric boolean variables} {
     set v truef
     list [catch {expr {!$v}} err] $err
-} {1 {can't use non-numeric string as operand of "!"}}
+} {1 {can't use non-numeric string "truef" as operand of "!"}}
 test expr-21.16 {non-numeric boolean variables} {
     set v "true "
     list [catch {expr {!$v}} err] $err
-} {1 {can't use non-numeric string as operand of "!"}}
+} {1 {can't use non-numeric string "true " as operand of "!"}}
 test expr-21.17 {non-numeric boolean variables} {
     set v "tru"
     list [catch {expr {!$v}} err] $err
@@ -832,23 +832,23 @@ test expr-21.20 {non-numeric boolean variables} {
 test expr-21.21 {non-numeric boolean variables} {
     set v "o"
     list [catch {expr {!$v}} err] $err
-} {1 {can't use non-numeric string as operand of "!"}}
+} {1 {can't use non-numeric string "o" as operand of "!"}}
 test expr-21.22 {non-numeric boolean variables} {
     set v ""
     list [catch {expr {!$v}} err] $err
-} {1 {can't use empty string as operand of "!"}}
+} {1 {can't use non-numeric string "" as operand of "!"}}
 
 # Test for non-numeric float handling.
 test expr-22.1 {non-numeric floats} {
     list [catch {expr {NaN + 1}} msg] $msg
-} {1 {can't use non-numeric floating-point value as operand of "+"}}
+} {1 {can't use non-numeric floating-point value "NaN" as operand of "+"}}
 test expr-22.2 {non-numeric floats} !ieeeFloatingPoint {
     list [catch {expr {Inf + 1}} msg] $msg
 } {1 {can't use infinite floating-point value as operand of "+"}}
 test expr-22.3 {non-numeric floats} {
     set nan NaN
     list [catch {expr {$nan + 1}} msg] $msg
-} {1 {can't use non-numeric floating-point value as operand of "+"}}
+} {1 {can't use non-numeric floating-point value "NaN" as operand of "+"}}
 test expr-22.4 {non-numeric floats} !ieeeFloatingPoint {
     set inf Inf
     list [catch {expr {$inf + 1}} msg] $msg
@@ -861,7 +861,7 @@ test expr-22.6 {non-numeric floats} !ieeeFloatingPoint {
 } {1 {floating-point value too large to represent}}
 test expr-22.7 {non-numeric floats} {
     list [catch {expr {1 / NaN}} msg] $msg
-} {1 {can't use non-numeric floating-point value as operand of "/"}}
+} {1 {can't use non-numeric floating-point value "NaN" as operand of "/"}}
 test expr-22.8 {non-numeric floats} !ieeeFloatingPoint {
     list [catch {expr {1 / Inf}} msg] $msg
 } {1 {can't use infinite floating-point value as operand of "/"}}
@@ -888,10 +888,10 @@ test expr-23.8 {CompileExponentialExpr: error compiling expo arm} -body {
 } -returnCodes error -match glob -result *
 test expr-23.9 {CompileExponentialExpr: runtime error} {
     list [catch {expr {24.0**"xx"}} msg] $msg
-} {1 {can't use non-numeric string as operand of "**"}}
+} {1 {can't use non-numeric string "xx" as operand of "**"}}
 test expr-23.10 {CompileExponentialExpr: runtime error} {
     list [catch {expr {"a"**2}} msg] $msg
-} {1 {can't use non-numeric string as operand of "**"}}
+} {1 {can't use non-numeric string "a" as operand of "**"}}
 test expr-23.11 {CompileExponentialExpr: runtime error} {
     list [catch {expr {0**-1}} msg] $msg
 } {1 {exponentiation of zero by negative power}}
diff --git a/tests/lindex.test b/tests/lindex.test
index b86e2e0..81f5c40 100644
--- a/tests/lindex.test
+++ b/tests/lindex.test
@@ -70,11 +70,11 @@ test lindex-3.4 {integer 3} testevalex {
 test lindex-3.5 {bad octal} -constraints testevalex -body {
     set x 0o8
     list [catch { testevalex {lindex {a b c} $x} } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test lindex-3.6 {bad octal} -constraints testevalex -body {
     set x -0o9
     list [catch { testevalex {lindex {a b c} $x} } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test lindex-3.7 {indexes don't shimmer wide ints} {
     set x [expr {(wide(1)<<31) - 2}]
     list $x [lindex {1 2 3} $x] [incr x] [incr x]
@@ -105,11 +105,11 @@ test lindex-4.5 {index = end-3} testevalex {
 test lindex-4.6 {bad octal} -constraints testevalex -body {
     set x end-0o8
     list [catch { testevalex {lindex {a b c} $x} } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test lindex-4.7 {bad octal} -constraints testevalex -body {
     set x end--0o9
     list [catch { testevalex {lindex {a b c} $x} } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test lindex-4.8 {bad integer, not octal} testevalex {
     set x end-0a2
     list [catch { testevalex {lindex {a b c} $x} } result] $result
@@ -261,11 +261,11 @@ test lindex-11.4 {integer 3} {
 test lindex-11.5 {bad octal} -body {
     set x 0o8
     list [catch { lindex {a b c} $x } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test lindex-11.6 {bad octal} -body {
     set x -0o9
     list [catch { lindex {a b c} $x } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 
 # Indices relative to end
 
@@ -307,11 +307,11 @@ test lindex-12.5 {index = end-3} {
 test lindex-12.6 {bad octal} -body {
     set x end-0o8
     list [catch { lindex {a b c} $x } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test lindex-12.7 {bad octal} -body {
     set x end--0o9
     list [catch { lindex {a b c} $x } result] $result
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test lindex-12.8 {bad integer, not octal} {
     set x end-0a2
     list [catch { lindex {a b c} $x } result] $result
diff --git a/tests/mathop.test b/tests/mathop.test
index f122b7b..0808d42 100644
--- a/tests/mathop.test
+++ b/tests/mathop.test
@@ -114,22 +114,22 @@ namespace eval ::testmathop {
     test mathop-1.10 {compiled +} { + 1 2 3000000000000000000000 } 3000000000000000000003
     test mathop-1.11 {compiled +: errors} -returnCodes error -body {
 	+ x 0
-    } -result {can't use non-numeric string as operand of "+"}
+    } -result {can't use non-numeric string "x" as operand of "+"}
     test mathop-1.12 {compiled +: errors} -returnCodes error -body {
 	+ nan 0
-    } -result {can't use non-numeric floating-point value as operand of "+"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "+"}
     test mathop-1.13 {compiled +: errors} -returnCodes error -body {
 	+ 0 x
-    } -result {can't use non-numeric string as operand of "+"}
+    } -result {can't use non-numeric string "x" as operand of "+"}
     test mathop-1.14 {compiled +: errors} -returnCodes error -body {
 	+ 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "+"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "+"}
     test mathop-1.15 {compiled +: errors} -returnCodes error -body {
 	+ 0o8 0
-    } -result {can't use invalid octal number as operand of "+"}
+    } -result {can't use non-numeric string "0o8" as operand of "+"}
     test mathop-1.16 {compiled +: errors} -returnCodes error -body {
 	+ 0 0o8
-    } -result {can't use invalid octal number as operand of "+"}
+    } -result {can't use non-numeric string "0o8" as operand of "+"}
     test mathop-1.17 {compiled +: errors} -returnCodes error -body {
 	+ 0 [error expectedError]
     } -result expectedError
@@ -152,22 +152,22 @@ namespace eval ::testmathop {
     test mathop-1.28 {interpreted +} { $op 1 2 3000000000000000000000 } 3000000000000000000003
     test mathop-1.29 {interpreted +: errors} -returnCodes error -body {
 	$op x 0
-    } -result {can't use non-numeric string as operand of "+"}
+    } -result {can't use non-numeric string "x" as operand of "+"}
     test mathop-1.30 {interpreted +: errors} -returnCodes error -body {
 	$op nan 0
-    } -result {can't use non-numeric floating-point value as operand of "+"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "+"}
     test mathop-1.31 {interpreted +: errors} -returnCodes error -body {
 	$op 0 x
-    } -result {can't use non-numeric string as operand of "+"}
+    } -result {can't use non-numeric string "x" as operand of "+"}
     test mathop-1.32 {interpreted +: errors} -returnCodes error -body {
 	$op 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "+"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "+"}
     test mathop-1.33 {interpreted +: errors} -returnCodes error -body {
 	$op 0o8 0
-    } -result {can't use invalid octal number as operand of "+"}
+    } -result {can't use non-numeric string "0o8" as operand of "+"}
     test mathop-1.34 {interpreted +: errors} -returnCodes error -body {
 	$op 0 0o8
-    } -result {can't use invalid octal number as operand of "+"}
+    } -result {can't use non-numeric string "0o8" as operand of "+"}
     test mathop-1.35 {interpreted +: errors} -returnCodes error -body {
 	$op 0 [error expectedError]
     } -result expectedError
@@ -189,22 +189,22 @@ namespace eval ::testmathop {
     test mathop-2.10 {compiled *} { * 1 2 3000000000000000000000 } 6000000000000000000000
     test mathop-2.11 {compiled *: errors} -returnCodes error -body {
 	* x 0
-    } -result {can't use non-numeric string as operand of "*"}
+    } -result {can't use non-numeric string "x" as operand of "*"}
     test mathop-2.12 {compiled *: errors} -returnCodes error -body {
 	* nan 0
-    } -result {can't use non-numeric floating-point value as operand of "*"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "*"}
     test mathop-2.13 {compiled *: errors} -returnCodes error -body {
 	* 0 x
-    } -result {can't use non-numeric string as operand of "*"}
+    } -result {can't use non-numeric string "x" as operand of "*"}
     test mathop-2.14 {compiled *: errors} -returnCodes error -body {
 	* 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "*"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "*"}
     test mathop-2.15 {compiled *: errors} -returnCodes error -body {
 	* 0o8 0
-    } -result {can't use invalid octal number as operand of "*"}
+    } -result {can't use non-numeric string "0o8" as operand of "*"}
     test mathop-2.16 {compiled *: errors} -returnCodes error -body {
 	* 0 0o8
-    } -result {can't use invalid octal number as operand of "*"}
+    } -result {can't use non-numeric string "0o8" as operand of "*"}
     test mathop-2.17 {compiled *: errors} -returnCodes error -body {
 	* 0 [error expectedError]
     } -result expectedError
@@ -227,22 +227,22 @@ namespace eval ::testmathop {
     test mathop-2.28 {interpreted *} { $op 1 2 3000000000000000000000 } 6000000000000000000000
     test mathop-2.29 {interpreted *: errors} -returnCodes error -body {
 	$op x 0
-    } -result {can't use non-numeric string as operand of "*"}
+    } -result {can't use non-numeric string "x" as operand of "*"}
     test mathop-2.30 {interpreted *: errors} -returnCodes error -body {
 	$op nan 0
-    } -result {can't use non-numeric floating-point value as operand of "*"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "*"}
     test mathop-2.31 {interpreted *: errors} -returnCodes error -body {
 	$op 0 x
-    } -result {can't use non-numeric string as operand of "*"}
+    } -result {can't use non-numeric string "x" as operand of "*"}
     test mathop-2.32 {interpreted *: errors} -returnCodes error -body {
 	$op 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "*"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "*"}
     test mathop-2.33 {interpreted *: errors} -returnCodes error -body {
 	$op 0o8 0
-    } -result {can't use invalid octal number as operand of "*"}
+    } -result {can't use non-numeric string "0o8" as operand of "*"}
     test mathop-2.34 {interpreted *: errors} -returnCodes error -body {
 	$op 0 0o8
-    } -result {can't use invalid octal number as operand of "*"}
+    } -result {can't use non-numeric string "0o8" as operand of "*"}
     test mathop-2.35 {interpreted *: errors} -returnCodes error -body {
 	$op 0 [error expectedError]
     } -result expectedError
@@ -261,7 +261,7 @@ namespace eval ::testmathop {
     test mathop-3.7 {compiled !} {! 10000000000000000000000000} 0
     test mathop-3.8 {compiled !: errors} -body {
 	! foobar
-    } -returnCodes error -result {can't use non-numeric string as operand of "!"}
+    } -returnCodes error -result {can't use non-numeric string "foobar" as operand of "!"}
     test mathop-3.9 {compiled !: errors} -body {
 	! 0 0
     } -returnCodes error -result "wrong # args: should be \"! boolean\""
@@ -278,7 +278,7 @@ namespace eval ::testmathop {
     test mathop-3.17 {interpreted !} {$op 10000000000000000000000000} 0
     test mathop-3.18 {interpreted !: errors} -body {
 	$op foobar
-    } -returnCodes error -result {can't use non-numeric string as operand of "!"}
+    } -returnCodes error -result {can't use non-numeric string "foobar" as operand of "!"}
     test mathop-3.19 {interpreted !: errors} -body {
 	$op 0 0
     } -returnCodes error -result "wrong # args: should be \"! boolean\""
@@ -287,10 +287,10 @@ namespace eval ::testmathop {
     } -returnCodes error -result "wrong # args: should be \"! boolean\""
     test mathop-3.21 {compiled !: error} -returnCodes error -body {
 	! NaN
-    } -result {can't use non-numeric floating-point value as operand of "!"}
+    } -result {can't use non-numeric floating-point value "NaN" as operand of "!"}
     test mathop-3.22 {interpreted !: error} -returnCodes error -body {
 	$op NaN
-    } -result {can't use non-numeric floating-point value as operand of "!"}
+    } -result {can't use non-numeric floating-point value "NaN" as operand of "!"}
 
     test mathop-4.1 {compiled ~} {~ 0} -1
     test mathop-4.2 {compiled ~} {~ 1} -2
@@ -301,7 +301,7 @@ namespace eval ::testmathop {
     test mathop-4.7 {compiled ~} {~ 10000000000000000000000000} -10000000000000000000000001
     test mathop-4.8 {compiled ~: errors} -body {
 	~ foobar
-    } -returnCodes error -result {can't use non-numeric string as operand of "~"}
+    } -returnCodes error -result {can't use non-numeric string "foobar" as operand of "~"}
     test mathop-4.9 {compiled ~: errors} -body {
 	~ 0 0
     } -returnCodes error -result "wrong # args: should be \"~ integer\""
@@ -310,10 +310,10 @@ namespace eval ::testmathop {
     } -returnCodes error -result "wrong # args: should be \"~ integer\""
     test mathop-4.11 {compiled ~: errors} -returnCodes error -body {
 	~ 0.0
-    } -result {can't use floating-point value as operand of "~"}
+    } -result {can't use floating-point value "0.0" as operand of "~"}
     test mathop-4.12 {compiled ~: errors} -returnCodes error -body {
 	~ NaN
-    } -result {can't use non-numeric floating-point value as operand of "~"}
+    } -result {can't use non-numeric floating-point value "NaN" as operand of "~"}
     set op ~
     test mathop-4.13 {interpreted ~} {$op 0} -1
     test mathop-4.14 {interpreted ~} {$op 1} -2
@@ -324,7 +324,7 @@ namespace eval ::testmathop {
     test mathop-4.19 {interpreted ~} {$op 10000000000000000000000000} -10000000000000000000000001
     test mathop-4.20 {interpreted ~: errors} -body {
 	$op foobar
-    } -returnCodes error -result {can't use non-numeric string as operand of "~"}
+    } -returnCodes error -result {can't use non-numeric string "foobar" as operand of "~"}
     test mathop-4.21 {interpreted ~: errors} -body {
 	$op 0 0
     } -returnCodes error -result "wrong # args: should be \"~ integer\""
@@ -333,10 +333,10 @@ namespace eval ::testmathop {
     } -returnCodes error -result "wrong # args: should be \"~ integer\""
     test mathop-4.23 {interpreted ~: errors} -returnCodes error -body {
 	$op 0.0
-    } -result {can't use floating-point value as operand of "~"}
+    } -result {can't use floating-point value "0.0" as operand of "~"}
     test mathop-4.24 {interpreted ~: errors} -returnCodes error -body {
 	$op NaN
-    } -result {can't use non-numeric floating-point value as operand of "~"}
+    } -result {can't use non-numeric floating-point value "NaN" as operand of "~"}
 
     test mathop-5.1 {compiled eq} {eq {} a} 0
     test mathop-5.2 {compiled eq} {eq a a} 1
@@ -377,32 +377,32 @@ namespace eval ::testmathop {
     test mathop-6.4 {compiled &} { & 3 7 6 } 2
     test mathop-6.5 {compiled &} -returnCodes error -body {
 	& 1.0 2 3
-    } -result {can't use floating-point value as operand of "&"}
+    } -result {can't use floating-point value "1.0" as operand of "&"}
     test mathop-6.6 {compiled &} -returnCodes error -body {
 	& 1 2 3.0
-    } -result {can't use floating-point value as operand of "&"}
+    } -result {can't use floating-point value "3.0" as operand of "&"}
     test mathop-6.7 {compiled &} { & 100000000002 18 -126 } 2
     test mathop-6.8 {compiled &} { & 0xff 0o377 333333333333 } 85
     test mathop-6.9 {compiled &} { & 1000000000000000000002 18 -126 } 2
     test mathop-6.10 {compiled &} { & 0xff 0o377 3333333333333333333333 } 85
     test mathop-6.11 {compiled &: errors} -returnCodes error -body {
 	& x 0
-    } -result {can't use non-numeric string as operand of "&"}
+    } -result {can't use non-numeric string "x" as operand of "&"}
     test mathop-6.12 {compiled &: errors} -returnCodes error -body {
 	& nan 0
-    } -result {can't use non-numeric floating-point value as operand of "&"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "&"}
     test mathop-6.13 {compiled &: errors} -returnCodes error -body {
 	& 0 x
-    } -result {can't use non-numeric string as operand of "&"}
+    } -result {can't use non-numeric string "x" as operand of "&"}
     test mathop-6.14 {compiled &: errors} -returnCodes error -body {
 	& 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "&"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "&"}
     test mathop-6.15 {compiled &: errors} -returnCodes error -body {
 	& 0o8 0
-    } -result {can't use invalid octal number as operand of "&"}
+    } -result {can't use non-numeric string "0o8" as operand of "&"}
     test mathop-6.16 {compiled &: errors} -returnCodes error -body {
 	& 0 0o8
-    } -result {can't use invalid octal number as operand of "&"}
+    } -result {can't use non-numeric string "0o8" as operand of "&"}
     test mathop-6.17 {compiled &: errors} -returnCodes error -body {
 	& 0 [error expectedError]
     } -result expectedError
@@ -419,32 +419,32 @@ namespace eval ::testmathop {
     test mathop-6.22 {interpreted &} { $op 3 7 6 } 2
     test mathop-6.23 {interpreted &} -returnCodes error -body {
 	$op 1.0 2 3
-    } -result {can't use floating-point value as operand of "&"}
+    } -result {can't use floating-point value "1.0" as operand of "&"}
     test mathop-6.24 {interpreted &} -returnCodes error -body {
 	$op 1 2 3.0
-    } -result {can't use floating-point value as operand of "&"}
+    } -result {can't use floating-point value "3.0" as operand of "&"}
     test mathop-6.25 {interpreted &} { $op 100000000002 18 -126 } 2
     test mathop-6.26 {interpreted &} { $op 0xff 0o377 333333333333 } 85
     test mathop-6.27 {interpreted &} { $op 1000000000000000000002 18 -126 } 2
     test mathop-6.28 {interpreted &} { $op 0xff 0o377 3333333333333333333333 } 85
     test mathop-6.29 {interpreted &: errors} -returnCodes error -body {
 	$op x 0
-    } -result {can't use non-numeric string as operand of "&"}
+    } -result {can't use non-numeric string "x" as operand of "&"}
     test mathop-6.30 {interpreted &: errors} -returnCodes error -body {
 	$op nan 0
-    } -result {can't use non-numeric floating-point value as operand of "&"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "&"}
     test mathop-6.31 {interpreted &: errors} -returnCodes error -body {
 	$op 0 x
-    } -result {can't use non-numeric string as operand of "&"}
+    } -result {can't use non-numeric string "x" as operand of "&"}
     test mathop-6.32 {interpreted &: errors} -returnCodes error -body {
 	$op 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "&"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "&"}
     test mathop-6.33 {interpreted &: errors} -returnCodes error -body {
 	$op 0o8 0
-    } -result {can't use invalid octal number as operand of "&"}
+    } -result {can't use non-numeric string "0o8" as operand of "&"}
     test mathop-6.34 {interpreted &: errors} -returnCodes error -body {
 	$op 0 0o8
-    } -result {can't use invalid octal number as operand of "&"}
+    } -result {can't use non-numeric string "0o8" as operand of "&"}
     test mathop-6.35 {interpreted &: errors} -returnCodes error -body {
 	$op 0 [error expectedError]
     } -result expectedError
@@ -487,32 +487,32 @@ namespace eval ::testmathop {
     test mathop-7.4 {compiled |} { | 3 7 6 } 7
     test mathop-7.5 {compiled |} -returnCodes error -body {
 	| 1.0 2 3
-    } -result {can't use floating-point value as operand of "|"}
+    } -result {can't use floating-point value "1.0" as operand of "|"}
     test mathop-7.6 {compiled |} -returnCodes error -body {
 	| 1 2 3.0
-    } -result {can't use floating-point value as operand of "|"}
+    } -result {can't use floating-point value "3.0" as operand of "|"}
     test mathop-7.7 {compiled |} { | 100000000002 18 -126 } -110
     test mathop-7.8 {compiled |} { | 0xff 0o377 333333333333 } 333333333503
     test mathop-7.9 {compiled |} { | 1000000000000000000002 18 -126 } -110
     test mathop-7.10 {compiled |} { | 0xff 0o377 3333333333333333333333 } 3333333333333333333503
     test mathop-7.11 {compiled |: errors} -returnCodes error -body {
 	| x 0
-    } -result {can't use non-numeric string as operand of "|"}
+    } -result {can't use non-numeric string "x" as operand of "|"}
     test mathop-7.12 {compiled |: errors} -returnCodes error -body {
 	| nan 0
-    } -result {can't use non-numeric floating-point value as operand of "|"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "|"}
     test mathop-7.13 {compiled |: errors} -returnCodes error -body {
 	| 0 x
-    } -result {can't use non-numeric string as operand of "|"}
+    } -result {can't use non-numeric string "x" as operand of "|"}
     test mathop-7.14 {compiled |: errors} -returnCodes error -body {
 	| 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "|"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "|"}
     test mathop-7.15 {compiled |: errors} -returnCodes error -body {
 	| 0o8 0
-    } -result {can't use invalid octal number as operand of "|"}
+    } -result {can't use non-numeric string "0o8" as operand of "|"}
     test mathop-7.16 {compiled |: errors} -returnCodes error -body {
 	| 0 0o8
-    } -result {can't use invalid octal number as operand of "|"}
+    } -result {can't use non-numeric string "0o8" as operand of "|"}
     test mathop-7.17 {compiled |: errors} -returnCodes error -body {
 	| 0 [error expectedError]
     } -result expectedError
@@ -529,32 +529,32 @@ namespace eval ::testmathop {
     test mathop-7.22 {interpreted |} { $op 3 7 6 } 7
     test mathop-7.23 {interpreted |} -returnCodes error -body {
 	$op 1.0 2 3
-    } -result {can't use floating-point value as operand of "|"}
+    } -result {can't use floating-point value "1.0" as operand of "|"}
     test mathop-7.24 {interpreted |} -returnCodes error -body {
 	$op 1 2 3.0
-    } -result {can't use floating-point value as operand of "|"}
+    } -result {can't use floating-point value "3.0" as operand of "|"}
     test mathop-7.25 {interpreted |} { $op 100000000002 18 -126 } -110
     test mathop-7.26 {interpreted |} { $op 0xff 0o377 333333333333 } 333333333503
     test mathop-7.27 {interpreted |} { $op 1000000000000000000002 18 -126 } -110
     test mathop-7.28 {interpreted |} { $op 0xff 0o377 3333333333333333333333 } 3333333333333333333503
     test mathop-7.29 {interpreted |: errors} -returnCodes error -body {
 	$op x 0
-    } -result {can't use non-numeric string as operand of "|"}
+    } -result {can't use non-numeric string "x" as operand of "|"}
     test mathop-7.30 {interpreted |: errors} -returnCodes error -body {
 	$op nan 0
-    } -result {can't use non-numeric floating-point value as operand of "|"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "|"}
     test mathop-7.31 {interpreted |: errors} -returnCodes error -body {
 	$op 0 x
-    } -result {can't use non-numeric string as operand of "|"}
+    } -result {can't use non-numeric string "x" as operand of "|"}
     test mathop-7.32 {interpreted |: errors} -returnCodes error -body {
 	$op 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "|"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "|"}
     test mathop-7.33 {interpreted |: errors} -returnCodes error -body {
 	$op 0o8 0
-    } -result {can't use invalid octal number as operand of "|"}
+    } -result {can't use non-numeric string "0o8" as operand of "|"}
     test mathop-7.34 {interpreted |: errors} -returnCodes error -body {
 	$op 0 0o8
-    } -result {can't use invalid octal number as operand of "|"}
+    } -result {can't use non-numeric string "0o8" as operand of "|"}
     test mathop-7.35 {interpreted |: errors} -returnCodes error -body {
 	$op 0 [error expectedError]
     } -result expectedError
@@ -597,32 +597,32 @@ namespace eval ::testmathop {
     test mathop-8.4 {compiled ^} { ^ 3 7 6 } 2
     test mathop-8.5 {compiled ^} -returnCodes error -body {
 	^ 1.0 2 3
-    } -result {can't use floating-point value as operand of "^"}
+    } -result {can't use floating-point value "1.0" as operand of "^"}
     test mathop-8.6 {compiled ^} -returnCodes error -body {
 	^ 1 2 3.0
-    } -result {can't use floating-point value as operand of "^"}
+    } -result {can't use floating-point value "3.0" as operand of "^"}
     test mathop-8.7 {compiled ^} { ^ 100000000002 18 -126 } -100000000110
     test mathop-8.8 {compiled ^} { ^ 0xff 0o377 333333333333 } 333333333333
     test mathop-8.9 {compiled ^} { ^ 1000000000000000000002 18 -126 } -1000000000000000000110
     test mathop-8.10 {compiled ^} { ^ 0xff 0o377 3333333333333333333333 } 3333333333333333333333
     test mathop-8.11 {compiled ^: errors} -returnCodes error -body {
 	^ x 0
-    } -result {can't use non-numeric string as operand of "^"}
+    } -result {can't use non-numeric string "x" as operand of "^"}
     test mathop-8.12 {compiled ^: errors} -returnCodes error -body {
 	^ nan 0
-    } -result {can't use non-numeric floating-point value as operand of "^"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "^"}
     test mathop-8.13 {compiled ^: errors} -returnCodes error -body {
 	^ 0 x
-    } -result {can't use non-numeric string as operand of "^"}
+    } -result {can't use non-numeric string "x" as operand of "^"}
     test mathop-8.14 {compiled ^: errors} -returnCodes error -body {
 	^ 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "^"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "^"}
     test mathop-8.15 {compiled ^: errors} -returnCodes error -body {
 	^ 0o8 0
-    } -result {can't use invalid octal number as operand of "^"}
+    } -result {can't use non-numeric string "0o8" as operand of "^"}
     test mathop-8.16 {compiled ^: errors} -returnCodes error -body {
 	^ 0 0o8
-    } -result {can't use invalid octal number as operand of "^"}
+    } -result {can't use non-numeric string "0o8" as operand of "^"}
     test mathop-8.17 {compiled ^: errors} -returnCodes error -body {
 	^ 0 [error expectedError]
     } -result expectedError
@@ -639,32 +639,32 @@ namespace eval ::testmathop {
     test mathop-8.22 {interpreted ^} { $op 3 7 6 } 2
     test mathop-8.23 {interpreted ^} -returnCodes error -body {
 	$op 1.0 2 3
-    } -result {can't use floating-point value as operand of "^"}
+    } -result {can't use floating-point value "1.0" as operand of "^"}
     test mathop-8.24 {interpreted ^} -returnCodes error -body {
 	$op 1 2 3.0
-    } -result {can't use floating-point value as operand of "^"}
+    } -result {can't use floating-point value "3.0" as operand of "^"}
     test mathop-8.25 {interpreted ^} { $op 100000000002 18 -126 } -100000000110
     test mathop-8.26 {interpreted ^} { $op 0xff 0o377 333333333333 } 333333333333
     test mathop-8.27 {interpreted ^} { $op 1000000000000000000002 18 -126 } -1000000000000000000110
     test mathop-8.28 {interpreted ^} { $op 0xff 0o377 3333333333333333333333 } 3333333333333333333333
     test mathop-8.29 {interpreted ^: errors} -returnCodes error -body {
 	$op x 0
-    } -result {can't use non-numeric string as operand of "^"}
+    } -result {can't use non-numeric string "x" as operand of "^"}
     test mathop-8.30 {interpreted ^: errors} -returnCodes error -body {
 	$op nan 0
-    } -result {can't use non-numeric floating-point value as operand of "^"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "^"}
     test mathop-8.31 {interpreted ^: errors} -returnCodes error -body {
 	$op 0 x
-    } -result {can't use non-numeric string as operand of "^"}
+    } -result {can't use non-numeric string "x" as operand of "^"}
     test mathop-8.32 {interpreted ^: errors} -returnCodes error -body {
 	$op 0 nan
-    } -result {can't use non-numeric floating-point value as operand of "^"}
+    } -result {can't use non-numeric floating-point value "nan" as operand of "^"}
     test mathop-8.33 {interpreted ^: errors} -returnCodes error -body {
 	$op 0o8 0
-    } -result {can't use invalid octal number as operand of "^"}
+    } -result {can't use non-numeric string "0o8" as operand of "^"}
     test mathop-8.34 {interpreted ^: errors} -returnCodes error -body {
 	$op 0 0o8
-    } -result {can't use invalid octal number as operand of "^"}
+    } -result {can't use non-numeric string "0o8" as operand of "^"}
     test mathop-8.35 {interpreted ^: errors} -returnCodes error -body {
 	$op 0 [error expectedError]
     } -result expectedError
@@ -775,13 +775,13 @@ test mathop-20.6 { one arg, error } {
         # skipping - for now, knownbug...
         foreach op {+ * / & | ^ **} {
             lappend res [TestOp $op {*}$vals]
-            lappend exp "can't use non-numeric string as operand of \"$op\"\
+            lappend exp "can't use non-numeric string \"x\" as operand of \"$op\"\
 		ARITH DOMAIN {non-numeric string}"
         }
     }
     foreach op {+ * / & | ^ **} {
 	lappend res [TestOp $op NaN 1]
-	lappend exp "can't use non-numeric floating-point value as operand of \"$op\"\
+	lappend exp "can't use non-numeric floating-point value \"NaN\" as operand of \"$op\"\
 	    ARITH DOMAIN {non-numeric floating-point value}"
     }
     expr {$res eq $exp ? 0 : $res}
@@ -850,15 +850,15 @@ test mathop-21.5 { unary ops, bad values } {
     set res {}
     set exp {}
     lappend res [TestOp / x]
-    lappend exp "can't use non-numeric string as operand of \"/\" ARITH DOMAIN {non-numeric string}"
+    lappend exp "can't use non-numeric string \"x\" as operand of \"/\" ARITH DOMAIN {non-numeric string}"
     lappend res [TestOp - x]
-    lappend exp "can't use non-numeric string as operand of \"-\" ARITH DOMAIN {non-numeric string}"
+    lappend exp "can't use non-numeric string \"x\" as operand of \"-\" ARITH DOMAIN {non-numeric string}"
     lappend res [TestOp ~ x]
-    lappend exp "can't use non-numeric string as operand of \"~\" ARITH DOMAIN {non-numeric string}"
+    lappend exp "can't use non-numeric string \"x\" as operand of \"~\" ARITH DOMAIN {non-numeric string}"
     lappend res [TestOp ! x]
-    lappend exp "can't use non-numeric string as operand of \"!\" ARITH DOMAIN {non-numeric string}"
+    lappend exp "can't use non-numeric string \"x\" as operand of \"!\" ARITH DOMAIN {non-numeric string}"
     lappend res [TestOp ~ 5.0]
-    lappend exp "can't use floating-point value as operand of \"~\" ARITH DOMAIN {floating-point value}"
+    lappend exp "can't use floating-point value \"5.0\" as operand of \"~\" ARITH DOMAIN {floating-point value}"
     expr {$res eq $exp ? 0 : $res}
 } 0
 test mathop-21.6 { unary ops, too many } {
@@ -965,9 +965,9 @@ test mathop-22.4 { unary ops, bad values } {
     set exp {}
     foreach op {& | ^} {
         lappend res [TestOp $op x 5]
-        lappend exp "can't use non-numeric string as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
+        lappend exp "can't use non-numeric string \"x\" as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
         lappend res [TestOp $op 5 x]
-        lappend exp "can't use non-numeric string as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
+        lappend exp "can't use non-numeric string \"x\" as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
     }
     expr {$res eq $exp ? 0 : $res}
 } 0
@@ -1080,15 +1080,15 @@ test mathop-24.3 { binary ops, bad values } {
     set exp {}
     foreach op {% << >>} {
         lappend res [TestOp $op x 1]
-        lappend exp "can't use non-numeric string as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
+        lappend exp "can't use non-numeric string \"x\" as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
         lappend res [TestOp $op 1 x]
-        lappend exp "can't use non-numeric string as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
+        lappend exp "can't use non-numeric string \"x\" as operand of \"$op\" ARITH DOMAIN {non-numeric string}"
     }
     foreach op {% << >>} {
         lappend res [TestOp $op 5.0 1]
-        lappend exp "can't use floating-point value as operand of \"$op\" ARITH DOMAIN {floating-point value}"
+        lappend exp "can't use floating-point value \"5.0\" as operand of \"$op\" ARITH DOMAIN {floating-point value}"
         lappend res [TestOp $op 1 5.0]
-        lappend exp "can't use floating-point value as operand of \"$op\" ARITH DOMAIN {floating-point value}"
+        lappend exp "can't use floating-point value \"5.0\" as operand of \"$op\" ARITH DOMAIN {floating-point value}"
     }
     foreach op {in ni} {
         lappend res [TestOp $op 5 "a b \{ c"]
@@ -1240,9 +1240,9 @@ test mathop-25.23 { exp operator errors } {
     lappend res [TestOp ** $huge 2.1]
     lappend exp "Inf"
     lappend res [TestOp ** 2 foo]
-    lappend exp "can't use non-numeric string as operand of \"**\" ARITH DOMAIN {non-numeric string}"
+    lappend exp "can't use non-numeric string \"foo\" as operand of \"**\" ARITH DOMAIN {non-numeric string}"
     lappend res [TestOp ** foo 2]
-    lappend exp "can't use non-numeric string as operand of \"**\" ARITH DOMAIN {non-numeric string}"
+    lappend exp "can't use non-numeric string \"foo\" as operand of \"**\" ARITH DOMAIN {non-numeric string}"
 
     expr {$res eq $exp ? 0 : $res}
 } 0
diff --git a/tests/string.test b/tests/string.test
index f558d30..e9e6e6d 100644
--- a/tests/string.test
+++ b/tests/string.test
@@ -280,10 +280,10 @@ test string-5.16 {string index, bytearray object with string obj shimmering} {
 } 0
 test string-5.17 {string index, bad integer} -body {
     list [catch {string index "abc" 0o8} msg] $msg
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test string-5.18 {string index, bad integer} -body {
     list [catch {string index "abc" end-0o0289} msg] $msg
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test string-5.19 {string index, bytearray object out of bounds} {
     string index [binary format I* {0x50515253 0x52}] -1
 } {}
diff --git a/tests/stringComp.test b/tests/stringComp.test
index 56fb69d..017e768 100644
--- a/tests/stringComp.test
+++ b/tests/stringComp.test
@@ -339,11 +339,11 @@ test stringComp-5.16 {string index, bytearray object with string obj shimmering}
 test stringComp-5.17 {string index, bad integer} -body {
     proc foo {} {string index "abc" 0o8}
     list [catch {foo} msg] $msg
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test stringComp-5.18 {string index, bad integer} -body {
     proc foo {} {string index "abc" end-0o0289}
     list [catch {foo} msg] $msg
-} -match glob -result {1 {*invalid octal number*}}
+} -match glob -result {1 {*}}
 test stringComp-5.19 {string index, bytearray object out of bounds} {
     proc foo {} {string index [binary format I* {0x50515253 0x52}] -1}
     foo
diff --git a/tests/while-old.test b/tests/while-old.test
index ee17d0b..e33bd0b 100644
--- a/tests/while-old.test
+++ b/tests/while-old.test
@@ -92,7 +92,7 @@ test while-old-4.3 {errors in while loops} {
 test while-old-4.4 {errors in while loops} {
     set err [catch {while {"a"+"b"} {error "loop aborted"}} msg]
     list $err $msg
-} {1 {can't use non-numeric string as operand of "+"}}
+} {1 {can't use non-numeric string "a" as operand of "+"}}
 test while-old-4.5 {errors in while loops} {
     catch {unset x}
     set x 1
diff --git a/tests/while.test b/tests/while.test
index 642ec93..c25b404 100644
--- a/tests/while.test
+++ b/tests/while.test
@@ -32,7 +32,7 @@ test while-1.2 {TclCompileWhileCmd: error in test expression} -body {
 } -match glob -result {*"while {$i<} break"}
 test while-1.3 {TclCompileWhileCmd: error in test expression} -body {
     while {"a"+"b"} {error "loop aborted"}
-} -returnCodes error -result {can't use non-numeric string as operand of "+"}
+} -returnCodes error -result {can't use non-numeric string "a" as operand of "+"}
 test while-1.4 {TclCompileWhileCmd: multiline test expr} -body {
     set value 1
     while {($tcl_platform(platform) != "foobar1") && \
@@ -343,7 +343,7 @@ test while-4.3 {while (not compiled): error in test expression} -body {
 test while-4.4 {while (not compiled): error in test expression} -body {
     set z while
     $z {"a"+"b"} {error "loop aborted"}
-} -returnCodes error -result {can't use non-numeric string as operand of "+"}
+} -returnCodes error -result {can't use non-numeric string "a" as operand of "+"}
 test while-4.5 {while (not compiled): multiline test expr} -body {
     set value 1
     set z while