diff -r dff305030965 libgo/runtime/go-caller.c
--- a/libgo/runtime/go-caller.c	Fri Sep 28 07:26:19 2012 -0700
+++ b/libgo/runtime/go-caller.c	Fri Sep 28 08:49:33 2012 -0700
@@ -172,7 +172,8 @@
   if (n < 1)
     return ret;
   ret.pc = pc;
-  ret.ok = __go_file_line (pc, &fn, &ret.file, &ret.line);
+  __go_file_line (pc, &fn, &ret.file, &ret.line);
+  ret.ok = 1;
   return ret;
 }