diff -r 4f3ce9284781 -r d7e3846464d0 src/os/windows/vm/os_windows.cpp
--- a/src/os/windows/vm/os_windows.cpp	Wed Jan 11 17:58:26 2012 -0500
+++ b/src/os/windows/vm/os_windows.cpp	Tue Jan 17 13:08:52 2012 -0500
@@ -1391,7 +1391,7 @@
 
 bool os::dll_address_to_function_name(address addr, char *buf,
                                       int buflen, int *offset) {
-  if (Decoder::decode(addr, buf, buflen, offset) == Decoder::no_error) {
+  if (Decoder::decode(addr, buf, buflen, offset)) {
     return true;
   }
   if (offset != NULL)  *offset  = -1;