Fix a crash caused by sharing in [string map]. [Bug 1018562]

1 files changed, 5 insertions, 1 deletions

diff --git a/tests/string.test b/tests/string.test
index 4021feb..b80d223 100644
--- a/tests/string.test
+++ b/tests/string.test
@@ -12,7 +12,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: string.test,v 1.41 2004/06/30 12:34:36 dkf Exp $
+# RCS: @(#) $Id: string.test,v 1.42 2004/08/30 18:06:34 dkf Exp $
 
 if {[lsearch [namespace children] ::tcltest] == -1} {
     package require tcltest
@@ -808,6 +808,10 @@ test string-10.20 {string map, dictionaries can alter map ordering} {
     set map {aa X a Y}
     list [string map [dict create aa X a Y] aaa] [string map $map aaa] [dict size $map] [string map $map aaa]
 } {YYY XY 2 XY}
+test string-10.21 {string map, nasty sharing crash from [Bug 1018562]} {
+    set a {a b}
+    string map $a $a
+} {b b}
 
 test string-11.1 {string match, too few args} {
     list [catch {string match a} msg] $msg