Fix for rather inaccurately titled bug
[ 1165306 ] Property access with decorator makes interpreter crash
Don't allow the creation of unbound methods with NULL im_class, because
attempting to call such crashes.
Backport candidate.
diff --git a/Lib/test/test_new.py b/Lib/test/test_new.py
index f022f7e..4aab1e2 100644
--- a/Lib/test/test_new.py
+++ b/Lib/test/test_new.py
@@ -47,6 +47,16 @@
verify(c.get_yolks() == 1 and c.get_more_yolks() == 4,
'Broken call of hand-crafted instance method')
+im = new.instancemethod(break_yolks, c)
+im()
+verify(c.get_yolks() == -1)
+try:
+ new.instancemethod(break_yolks, None)
+except TypeError:
+ pass
+else:
+ raise TestFailed, "dangerous instance method creation allowed"
+
# It's unclear what the semantics should be for a code object compiled at
# module scope, but bound and run in a function. In CPython, `c' is global
# (by accident?) while in Jython, `c' is local. The intent of the test