Eugene Kapun <[email protected]> added the comment:
I've found more unsafe code in Objects/setobject.c.
This code makes Python 3.1.2 segfault by using a bug in function set_merge:
class bad:
def __eq__(self, other):
if be_bad:
set2.clear()
raise Exception
return self is other
def __hash__(self):
return 0
be_bad = False
set1 = {bad()}
set2 = {bad() for i in range(2000)}
be_bad = True
set1.update(set2)
Function set_symmetric_difference_update has a similar bug.
Another bug in set_symmetric_difference_update:
class bad:
def __init__(self):
print("Creating", id(self))
def __del__(self):
print("Deleting", id(self))
def __eq__(self, other):
print("Comparing", id(self), "and", id(other))
if be_bad:
dict2.clear()
return self is other
def __hash__(self):
return 0
be_bad = False
set1 = {bad()}
dict2 = {bad(): None}
be_bad = True
set1.symmetric_difference_update(dict2)
----------
title: set_lookkey is unsafe -> Objects/setobject.c contains unsafe code
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Python tracker <[email protected]>
<http://bugs.python.org/issue8420>
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