[Numpy-discussion] linux wheels coming soon

[Nathaniel Smith]

I can reproduce in self-compiled 1.9, so it's not a new bug.

I think something's going wrong with NPY_SIGINT_ON / NPY_SIGINT_OFF,
where our special sigint handler is getting left in place even after
our code finishes running.

Skimming the code, my best guess is that this is due to a race
condition in how we save/restore the original signal handler, when
multiple threads are running numpy fftpack code at the same time (and
thus using NPY_SIGINT_{ON,OFF} from multiple threads).

-n

On Wed, Apr 13, 2016 at 1:47 PM, Matthew Brett <matthew.brett at gmail.com> wrote:
> On Wed, Apr 13, 2016 at 1:29 PM, Oscar Benjamin
> <oscar.j.benjamin at gmail.com> wrote:
>> On 13 April 2016 at 20:15, Matthew Brett <matthew.brett at gmail.com> wrote:
>>> Done.  If y'all are on linux, and you have pip >= 8.11,  you should
>>> now see this kind of thing:
>>
>> That's fantastic. Thanks Matt!
>>
>> I just test installed this and ran numpy.test(). All tests passed but
>> then I got a segfault at the end by (semi-accidentally) hitting Ctrl-C
>> at the prompt:
>>
>> $ python
>> Python 2.7.9 (default, Apr  2 2015, 15:33:21)
>> [GCC 4.9.2] on linux2
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> import numpy
>>>>> numpy.test()
>> Running unit tests for numpy
>> <snip>
>> Ran 5781 tests in 72.238s
>>
>> OK (KNOWNFAIL=6, SKIP=15)
>> <nose.result.TextTestResult run=5781 errors=0 failures=0>
>>>>> Segmentation fault (core dumped)
>>
>> It was stopped at the prompt and then I did Ctrl-C and then the
>> seg-fault message.
>>
>> $ uname -a
>> Linux vnwulf 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC
>> 2015 x86_64 x86_64 x86_64 GNU/Linux
>> $ lsb_release -a
>> No LSB modules are available.
>> Distributor ID:    Ubuntu
>> Description:    Ubuntu 15.04
>> Release:    15.04
>> Codename:    vivid
>>
>
> Thanks so much for testing - that's very useful.
>
> I get the same thing on my Debian Sid machine.
>
> Actually I also get the same thing with a local compile against Debian
> ATLAS, here's the stack trace after:
>
>>>> import numpy; numpy.test()
>>>> # Ctrl-C
>
> https://gist.github.com/f6d8fb42f24689b39536a2416d717056
>
> Do you get this as well?
>
> Cheers,
>
> Matthew
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-- 
Nathaniel J. Smith -- https://vorpus.org