[issue8153] 'set' union() fails in specific use case

[Frank Rene Schaefer]

New submission from Frank Rene Schaefer <fschaef at gmail.com>:

The union operation fails in the following use case

Python 2.6.4 (r264:75706, Jan 30 2010, 22:50:05) 
[GCC 4.3.1 20080507 (prerelease) [gcc-4_3-branch revision 135036]] on linux2
>>> def func():
...     a = set([0])
...     a.pop()
...     b = set([1, 2])
...     a.union(b)
...     return a
... 
>>> func()
set([])

Note, that is does *not* fail if it is *not* inside a function, i.e.

>>> a = set([0])
>>> a.pop()
0
>>> b = set([1, 2])
>>> a.union(b)
set([1, 2])
>>>

----------
components: Interpreter Core
messages: 101154
nosy: fschaef2
severity: normal
status: open
title: 'set' union() fails in specific use case
type: behavior
versions: Python 2.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8153>
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