diff -r 4ff37fbcd4e8 Modules/readline.c
--- a/Modules/readline.c	Wed Apr 23 15:37:37 2014 -0500
+++ b/Modules/readline.c	Wed Apr 30 15:22:32 2014 +0800
@@ -972,7 +972,13 @@
 setup_readline(readlinestate *mod_state)
 {
 #ifdef SAVE_LOCALE
-    char *saved_locale = strdup(setlocale(LC_CTYPE, NULL));
+    char *_locale = setlocale(LC_CTYPE, NULL);
+    char *saved_locale;
+    
+    if(!_locale)
+        _locale = "";
+
+    saved_locale = strdup(_locale);
     if (!saved_locale)
         Py_FatalError("not enough memory to save locale");
 #endif