[Development] macOS CI node segfault

[Jedrzej Nowacki]

Bug report for it doesn't exist it is something hanging in back of our heads for months, but feel free to fill the form.

Cheers,
  Jędrek

________________________________________
From: Sean Harmer <sh at theharmers.co.uk>
Sent: Monday, October 10, 2016 9:11 PM
To: Jedrzej Nowacki; development at qt-project.org
Subject: Re: [Development] macOS CI node segfault

On 10/10/2016 09:14, Jedrzej Nowacki wrote:
> As Thiago said. Moc is crashing on OSX for an unknown reason. It is
> unlikely to be RAM problem,  because we would see much wider
> distribution of crashes (related bug report:
> https://bugreports.qt.io/browse/QTQAINFRA-990).

Argh, sorry I indeed misread the segfault error. It is moc, not the
compilation of moc's output as I thought.

> Regarding overwriting logs, it is Coin bug. For some reason we naively
> believed that builds are deterministic and there is only one build log
> 100 % reproducible...  Well something to fix.

Is there a JIRA for this or should I file one?

Cheers,

Sean

>
>
> Cheers,
>
>   Jędrek
>
> ------------------------------------------------------------------------
> *From:* Development
> <development-bounces+jedrzej.nowacki=qt.io at qt-project.org> on behalf of
> Sean Harmer <sh at theharmers.co.uk>
> *Sent:* Sunday, October 9, 2016 9:51:47 AM
> *To:* development at qt-project.org
> *Subject:* Re: [Development] macOS CI node segfault
>
> Hi Thiago,
>
> On 08/10/2016 21:52, Thiago Macieira wrote:
>> Em sábado, 8 de outubro de 2016, às 14:44:59 CEST, Sean Harmer escreveu:
>>> Hi,
>>>
>>> Just seen another segfault on one of the mac mini CI nodes:
>>>
>>> http://testresults.qt.io/logs/qt/qt3d/8f273f12204fb46ea508393ea9ad3dcd41a498
>>> b4/OSXOSX_10_10x86_64OSXOSX_10_10x86_64Clangqtci-osx-10.10-x86_64DebugAndRel
>>> ease_Release/3c7a8e84853b9a3cd649d77444b6f1a885819671/buildlog.txt.gz
>>
>> Where? That log file does not contain the word "segfault", "error" or the
>> phrase "segmentation fault".
>
> Something very wrong is going on then. Look at the failed run at Oct 8
> 2:38 PM from https://codereview.qt-project.org/#/c/168122/ which is
> where I copied the link from. The report on gerrit says segmentation
> fault, as did the report when I checked it at the time, yet now indeed
> the report has no mention of a segfault at all.
>
> Sounds like something overwrote the compile report which is a little
> concerning.
>
>>
>> That said, we've known moc has been crashing on Mac for a couple of months and
>> we have no idea what's causing it.
>
> This was a segfault in the compiler when building
> .moc/release/moc_qrenderaspect.cpp rather than when running moc but I am
> suspicious of some bad RAM or something on the hardware.
>
> Cheers,
>
> Sean
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