Propagate the current exception in get_inprogress_dict() -- it doesn't

need to be cleared.

Objects/object.c

@@ -356,7 +356,6 @@ get_inprogress_dict(void)
 	} 
 	inprogress = PyDict_GetItem(tstate_dict, _PyCompareState_Key); 
 	if (inprogress == NULL) {
-		PyErr_Clear();
 		inprogress = PyDict_New();
 		if (inprogress == NULL)
 			return NULL;