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Fix crasher for when an object's __del__ creates a new weakref to itself.

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Patch only fixes new-style classes; classic classes still buggy.

Closes bug #1377858.  Already backported.
This commit is contained in:
Brett Cannon 2007-01-23 23:21:22 +00:00
parent 6c5c502b91
commit f5bee30e30
5 changed files with 34 additions and 1 deletions
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14
Lib/test/test_weakref.py
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@ -6,6 +6,8 @@ import weakref
from test import test_support
# Used in ReferencesTestCase.test_ref_created_during_del() .
ref_from_del = None
class C:
def method(self):
@ -630,6 +632,18 @@ class ReferencesTestCase(TestBase):
finally:
gc.set_threshold(*thresholds)
def test_ref_created_during_del(self):
# Bug #1377858
# A weakref created in an object's __del__() would crash the
# interpreter when the weakref was cleaned up since it would refer to
# non-existent memory. This test should not segfault the interpreter.
class Target(object):
def __del__(self):
global ref_from_del
ref_from_del = weakref.ref(self)
w = Target()
class SubclassableWeakrefTestCase(unittest.TestCase):