[issue30570] issubclass segfaults on objects with weird __getattr__

[Louie Lu]

Louie Lu added the comment:

I can reproduce this bugs on 3.7, Linux.

Python 3.7.0a0 (heads/master:d3bedf356a, Jun  5 2017, 10:21:52) 
[GCC 6.3.1 20170306] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> class Foo(object):
...  def __getattr__(self, attr):
...   return (self, None)
... 
>>> issubclass(Foo(), int)

[1]    21897 segmentation fault (core dumped)  ./python

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nosy: +louielu
versions: +Python 3.7

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<http://bugs.python.org/issue30570>
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