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diff --git a/ChangeLog b/ChangeLog
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+++ b/ChangeLog
@@ -2,6 +2,9 @@
 
 	*** 8.5.7 TAGGED FOR RELEASE ***
 
+	* generic/tclStringObj.c:	AppendUnicodeToUnicodeRep failed
+	to set stringPtr->allocated to 0, leading to crashes.
+
 	* changes:	Update for 8.5.7 release.
 
 2009-04-14  Stuart Cassoff  <stwo@users.sourceforge.net>