--- readline-5.2/complete.c	2006-07-28 17:35:49.000000000 +0200
+++ readline-5.2-fixed/complete.c	2007-07-27 16:57:02.000000000 +0200
@@ -961,6 +961,7 @@
   if (rl_attempted_completion_function)
     {
       matches = (*rl_attempted_completion_function) (text, start, end);
+      if (matches && ! matches[0]) {
+        free(matches);
+        matches = 0;
+      }

 
       if (matches || rl_attempted_completion_over)
 	{