Index: gdb/linespec.c
===================================================================
RCS file: /cvs/src/src/gdb/linespec.c,v
retrieving revision 1.129
diff -u -p -r1.129 linespec.c
--- gdb/linespec.c	18 Aug 2011 16:17:38 -0000	1.129
+++ gdb/linespec.c	25 Aug 2011 15:55:21 -0000
@@ -1835,6 +1835,8 @@ symtab_from_filename (char **argptr, cha
     }
 
   /* Discard the file name from the arg.  */
+  if (*p1 == '\0')
+    return file_symtab;
   p = p1 + 1;
   while (*p == ' ' || *p == '\t')
     p++;