New submission from Bohuslav "Slavek" Kabrda:
test_faulthandler.test_register_chain fails on some 64bit architectures (arm8,
ppc64) with kernel >= 3.10:
======================================================================
FAIL: test_register_chain (__main__.FaultHandlerTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/builddir/build/BUILD/Python-3.3.2/Lib/test/test_faulthandler.py", line
588, in test_register_chain
self.check_register(chain=True)
File "/builddir/build/BUILD/Python-3.3.2/Lib/test/test_faulthandler.py", line
572, in check_register
self.assertEqual(exitcode, 0)
AssertionError: -11 != 0
I created a minimal reproducer (reproduces the issue on 3.3, 3.4 and dev) of
this segfault (attached). When run with GC assertions turned on, Python fails
with:
python: /builddir/build/BUILD/Python-3.3.2/Modules/gcmodule.c:332: update_refs:
Assertion `gc->gc.gc_refs == (-3)\' failed.
We experienced this issue when building Python 3.3 on Fedora's arm8 builder
[1], it seems that opensuse have experienced the same failure on ppc64 [2] and
ubuntu has a similar issue in their 64bit arm builds [3].
It seems that this may be caused by a change in kernel, since it's only
reproducible on kernel >= 3.10. A nice explanation of what goes on and how the
problem can be narrowed down is at the opensuse bug report [4], this is
basically where I got stuck with this problem, too.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1045193
[2] https://bugzilla.novell.com/show_bug.cgi?id=831629
[3] https://bugs.launchpad.net/ubuntu/+source/python3.4/+bug/1264354
[4] https://bugzilla.novell.com/show_bug.cgi?id=831629#c15
----------
components: Tests
files: test_register_chain_segfault_reproducer.py
messages: 215365
nosy: bkabrda
priority: normal
severity: normal
status: open
title: test_faulthandler.test_register_chain fails on 64bit ppc/arm with kernel
>= 3.10
versions: Python 3.3, Python 3.4, Python 3.5
Added file:
http://bugs.python.org/file34699/test_register_chain_segfault_reproducer.py
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