=== modified file 'mysys/my_open.c'
--- mysys/my_open.c	2013-08-16 19:17:40 +0000
+++ mysys/my_open.c	2013-11-07 02:32:55 +0000
@@ -138,9 +138,10 @@
     }
     else
     {
+      char *DupFileName = (char*) my_strdup(key_memory_my_file_info,
+                                            FileName,MyFlags);
       mysql_mutex_lock(&THR_LOCK_open);
-      if ((my_file_info[fd].name = (char*) my_strdup(key_memory_my_file_info,
-                                                     FileName,MyFlags)))
+      if ((my_file_info[fd].name = DupFileName))
       {
         my_file_opened++;
         my_file_total_opened++;