[pypy-issue] [issue1191] behavior change in sets infix operation

[Aric]

New submission from Aric <aric.hagberg at gmail.com>:

I noticed this change in pypy-1.9.  The difference operator works differently 
for infix vs explicit (set.difference()).  e.g. 

# OK
s = set([0])
b = set()
d = s.difference(b)
print(d) # set([0])
n = s.pop()
print(d) # set([0])

# WRONG?
s = set([0])
b = set()
d = s - b
print(d) # set([0])
n = s.pop()
print(d) # set([])

$ pypy -v
Python 2.7.2 (341e1e3821ff, Jun 07 2012, 15:38:48)
[PyPy 1.9.0 with GCC 4.4.3] on linux2

----------
messages: 4501
nosy: hagberg, pypy-issue
priority: bug
status: unread
title: behavior change in sets infix operation

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PyPy bug tracker <tracker at bugs.pypy.org>
<https://bugs.pypy.org/issue1191>
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