diff -r 4d5cb87230f4 Objects/unicodeobject.c
--- a/Objects/unicodeobject.c	Tue Oct 09 11:16:26 2012 -0400
+++ b/Objects/unicodeobject.c	Sat Oct 13 01:24:45 2012 +0300
@@ -10120,6 +10120,7 @@
                 /* widen self and buf1 */
                 rkind = kind2;
                 if (release1) PyMem_Free(buf1);
+                release1 = 0;
                 sbuf = _PyUnicode_AsKind(self, rkind);
                 if (!sbuf) goto error;
                 srelease = 1;
@@ -10181,6 +10182,7 @@
             if (!sbuf) goto error;
             srelease = 1;
             if (release1) PyMem_Free(buf1);
+            release1 = 0;
             buf1 = _PyUnicode_AsKind(str1, rkind);
             if (!buf1) goto error;
             release1 = 1;