--- a/libgo/runtime/mprof.goc
+++ b/libgo/runtime/mprof.goc
@@ -403,7 +403,7 @@ func ThreadCreateProfile(p Slice) (n int
 
 func Stack(b Slice, all bool) (n int) {
 	byte *pc, *sp;
-	bool enablegc;
+	bool enablegc = false; /* workaround GCC bug #36550 */
 	
 	sp = runtime_getcallersp(&b);
 	pc = (byte*)(uintptr)runtime_getcallerpc(&b);