Fix arigo's funky LOAD_NAME bug: implicit globals inside classes have

historically been looked up using LOAD_NAME, not LOAD_GLOBAL.
looked up by LOAD_NAME, not

Lib/test/test_scope.py

@@ -440,6 +440,15 @@ vereq(test(6)(2), 8)
 x = -1
 vereq(test(3)(2), 5)
 
+looked_up_by_load_name = False
+class X:
+    # Implicit globals inside classes are be looked up by LOAD_NAME, not
+    # LOAD_GLOBAL.
+    locals()['looked_up_by_load_name'] = True
+    passed = looked_up_by_load_name
+
+verify(X.passed)
+
 print "18. verify that locals() works"
 
 def f(x):

Python/compile.c

@@ -2731,7 +2731,8 @@ compiler_nameop(struct compiler *c, identifier name, expr_context_ty ctx)
 			optype = OP_FAST;
 		break;
 	case GLOBAL_IMPLICIT:
-		if (!c->u->u_ste->ste_unoptimized)
+		if (c->u->u_ste->ste_type == FunctionBlock &&
+			!c->u->u_ste->ste_unoptimized)
 			optype = OP_GLOBAL;
 		break;
 	case GLOBAL_EXPLICIT: