* generic/tclVar.c (Tcl_LappendObjCmd):

	* tests/append.test(4.21-22): fix for longstanding [Bug 1570718],
	lappending nothing to non-list. Reported by lvirden

3 files changed, 23 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 35b947a..1ba0c01 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2006-10-05  Miguel Sofer  <msofer@users.sf.net>
+
+	* generic/tclVar.c (Tcl_LappendObjCmd):
+	* tests/append.test(4.21-22): fix for longstanding [Bug 1570718],
+	lappending nothing to non-list. Reported by lvirden
+
 2006-10-04  Kevin Kenny  <kennykb@acm.org>
 
 	* tzdata/: Olson's tzdata2006m.
diff --git a/generic/tclVar.c b/generic/tclVar.c
index e3daeff..0576114 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -15,7 +15,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclVar.c,v 1.121 2006/08/10 12:15:31 dkf Exp $
+ * RCS: @(#) $Id: tclVar.c,v 1.122 2006/10/05 11:38:50 msofer Exp $
  */
 
 #include "tclInt.h"
@@ -2365,7 +2365,12 @@ Tcl_LappendObjCmd(
 	    if (newValuePtr == NULL) {
 		return TCL_ERROR;
 	    }
-	}
+	} else {
+	    result = Tcl_ListObjLength(interp, newValuePtr, &numElems);
+	    if (result != TCL_OK) {
+		return result;
+	    }
+	}	    
     } else {
 	/*
 	 * We have arguments to append. We used to call Tcl_SetVar2 to append
diff --git a/tests/append.test b/tests/append.test
index 58c0de7..a9772c4 100644
--- a/tests/append.test
+++ b/tests/append.test
@@ -11,7 +11,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: append.test,v 1.7 2001/07/03 23:39:24 hobbs Exp $
+# RCS: @(#) $Id: append.test,v 1.8 2006/10/05 11:38:50 msofer Exp $
 
 if {[lsearch [namespace children] ::tcltest] == -1} {
     package require tcltest
@@ -143,6 +143,15 @@ test append-4.20 {lappend command} {
     catch {unset x}
     lappend x(0) abc
 } {abc}
+unset x
+test append-4.21 {lappend command} {
+    set x \"
+    list [catch {lappend x} msg] $msg
+} {1 {unmatched open quote in list}}
+test append-4.22 {lappend command} {
+    set x \"
+    list [catch {lappend x abc} msg] $msg
+} {1 {unmatched open quote in list}}
 
 proc check {var size} {
     set l [llength $var]