New issue 2290: segfault in pypy 2.2.1
https://bitbucket.org/pypy/pypy/issues/2290/segfault-in-pypy-221
FredStober:
Hi,
I have another code that *sometimes* crashes with a segfault. I've reduced the
problem to a small test program. It crashes reliably with my pypy 2.2.1 that is
bundled with Ubuntu 14.04.4 LTS (Python 2.7.3 (2.2.1+dfsg-1ubuntu0.3, Sep 30
2015, 15:18:40); [PyPy 2.2.1 with GCC 4.8.4] on linux2):
```
#!python
class Wrapper(object):
pass
while True:
lines = []
for i in range(100000): # larger numbers => larger crash probability
(originally read from a file)
lines.append('a=a')
for line in lines:
map(str.strip, line.split('=', 1))
tmp = {'1': None, '2': None, '3': None, '4': None, '5': None, '6':
None, Wrapper(): None}
for jobNum in range(2): # len = 16!
map(tmp.get, tmp.keys())
```
I've been unable to reproduce the problem with PyPy 5.2.0-alpha0 (Apr 22 2016,
22:07:05) [357a144f9ea1]. However the code seems to be very sensitive to the
memory layout (after changing to range(15), the problem disappears).
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