* generic/tclCmdAH.c (Tcl_ForeachObjCmd): Stop throwing away

        * tests/foreach.test (foreach-1.14):    useful error information when
        loop variable sets fail.

3 files changed, 15 insertions, 8 deletions

diff --git a/ChangeLog b/ChangeLog
index db1ae9a..126deb2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2007-03-01  Don Porter  <dgp@users.sourceforge.net>
 
+	* generic/tclCmdAH.c (Tcl_ForeachObjCmd):	Stop throwing away
+	* tests/foreach.test (foreach-1.14):	useful error information when
+	loop variable sets fail.
+
 	* generic/tclCmdIL.c (Tcl_LassignObjCmd):	Rewrite to make an
 	efficient private copy of the list argument, so we can operate on the
 	list elements directly with no fear of shimmering effects.  Replaces
diff --git a/generic/tclCmdAH.c b/generic/tclCmdAH.c
index a017a2d..3919f25 100644
--- a/generic/tclCmdAH.c
+++ b/generic/tclCmdAH.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: tclCmdAH.c,v 1.84 2007/03/01 16:16:04 dgp Exp $
+ * RCS: @(#) $Id: tclCmdAH.c,v 1.85 2007/03/01 17:55:16 dgp Exp $
  */
 
 #include "tclInt.h"
@@ -1804,11 +1804,11 @@ Tcl_ForeachObjCmd(
 		    valuePtr = Tcl_NewObj(); /* Empty string */
 		}
 		varValuePtr = Tcl_ObjSetVar2(interp, varvList[i][v], NULL,
-			valuePtr, 0);
+			valuePtr, TCL_LEAVE_ERR_MSG);
 		if (varValuePtr == NULL) {
-		    Tcl_ResetResult(interp);
-		    Tcl_AppendResult(interp, "couldn't set loop variable: \"",
-			    TclGetString(varvList[i][v]), "\"", NULL);
+		    Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf(
+			    "\n    (setting foreach loop variable \"%s\"",
+			    TclGetString(varvList[i][v])));
 		    result = TCL_ERROR;
 		    goto done;
 		}
diff --git a/tests/foreach.test b/tests/foreach.test
index 8f452ed..a49ceaa 100644
--- a/tests/foreach.test
+++ b/tests/foreach.test
@@ -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: foreach.test,v 1.11 2007/03/01 10:07:12 dkf Exp $
+# RCS: @(#) $Id: foreach.test,v 1.12 2007/03/01 17:55:16 dgp Exp $
 
 if {[lsearch [namespace children] ::tcltest] == -1} {
     package require tcltest
@@ -73,8 +73,11 @@ catch {unset a}
 test foreach-1.14 {foreach errors} {
     catch {unset a}
     set a(0) 44
-    list [catch {foreach a {1 2 3} {}} msg] $msg
-} {1 {couldn't set loop variable: "a"}}
+    list [catch {foreach a {1 2 3} {}} msg o] $msg $::errorInfo
+} {1 {can't set "a": variable is array} {can't set "a": variable is array
+    (setting foreach loop variable "a"
+    invoked from within
+"foreach a {1 2 3} {}"}}
 test foreach-1.15 {foreach errors} {
     list [catch {foreach {} {} {}} msg] $msg
 } {1 {foreach varlist is empty}}