[pypy-commit] pypy set-strategies: be sure that w_obj is setobject

[l.diekmann]

Author: Lukas Diekmann <lukas.diekmann at uni-duesseldorf.de>
Branch: set-strategies
Changeset: r49167:3f70c38813f3
Date: 2011-05-18 17:43 +0200
http://bitbucket.org/pypy/pypy/changeset/3f70c38813f3/

Log:	be sure that w_obj is setobject

diff --git a/pypy/objspace/std/setobject.py b/pypy/objspace/std/setobject.py
--- a/pypy/objspace/std/setobject.py
+++ b/pypy/objspace/std/setobject.py
@@ -713,6 +713,8 @@
 def _convert_set_to_frozenset(space, w_obj):
     #XXX can be optimized
     if space.is_true(space.isinstance(w_obj, space.w_set)):
+        assert isinstance(w_obj, W_SetObject)
+        #XXX better instantiate?
         w_frozen = W_FrozensetObject(space, None)
         w_frozen.strategy = w_obj.strategy
         w_frozen.sstorage = w_obj.sstorage