Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
There's now a new structmember code, T_OBJECT_EX, which is used for
all __slot__ variables (except __weakref__, which has special behavior
anyway). This new code raises AttributeError when the variable is
NULL rather than converting NULL to None.
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index d76013e..48d1138 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -978,19 +978,21 @@
__slots__ = ['a']
x = C1()
verify(not hasattr(x, "__dict__"))
- vereq(x.a, None)
+ verify(not hasattr(x, "a"))
x.a = 1
vereq(x.a, 1)
+ x.a = None
+ veris(x.a, None)
del x.a
- vereq(x.a, None)
+ verify(not hasattr(x, "a"))
class C3(object):
__slots__ = ['a', 'b', 'c']
x = C3()
verify(not hasattr(x, "__dict__"))
- verify(x.a is None)
- verify(x.b is None)
- verify(x.c is None)
+ verify(not hasattr(x, 'a'))
+ verify(not hasattr(x, 'b'))
+ verify(not hasattr(x, 'c'))
x.a = 1
x.b = 2
x.c = 3