Some small fixes

src/runtime/objmodel.cpp

@@ -2017,7 +2017,6 @@ Box* dataDescriptorInstanceSpecialCases(GetattrRewriteArgs* rewrite_args, BoxedS
         }
 
         if (rewrite_args) {
-            assert(0 && "check refcounting");
             r_descr->addAttrGuard(offsetof(BoxedProperty, prop_get), (intptr_t)prop->prop_get);
 
             RewriterVar* r_prop_get = r_descr->getAttr(offsetof(BoxedProperty, prop_get));
@@ -2460,7 +2459,7 @@ Box* getattrInternalGeneric(Box* obj, BoxedString* attr, GetattrRewriteArgs* rew
                          && attr->interned_state == SSTATE_INTERNED_IMMORTAL)) {
                 class Helper {
                 public:
-                    static Box* call(Box* obj, BoxedString* attr) { return incref(obj->getattr(attr)); }
+                    static Box* call(Box* obj, BoxedString* attr) { return xincref(obj->getattr(attr)); }
                 };
 
                 RewriterVar* r_rtn = rewrite_args->rewriter->call(

test/tests/callattr_exceptions.py

-# expected: reffail
 # Make sure that callattrs handle exceptions (including
 # different exception styles) correctly.
 class C(object):

test/tests/getattr_guarding.py

-# expected: reffail
 # Test some weird getattr/hasattr guarding scenarios
 
 

test/tests/getattr_start_failing_test.py

-# expected: reffail
 g = 0
 class C(object):
     @property

test/tests/property_ics.py

-# expected: reffail
 # run_args: -n
 # statcheck: noninit_count('slowpath_getattr') <= 25
 

test/tests/with_ctxclass_order_of_access.py

-# expected: reffail
 class Mgr(object):
     def __init__(self): print 'Mgr.__init__()'