[CRITICAL] KIO Test "threadtest" can enter into infinite loop

[Ben Cooksley]

On Mon, Nov 9, 2015 at 8:30 PM, David Faure <faure at kde.org> wrote:
> On Monday 09 November 2015 19:36:09 Ben Cooksley wrote:
>> On Mon, Nov 9, 2015 at 10:26 AM, Albert Astals Cid <aacid at kde.org> wrote:
>> > El Saturday 07 November 2015, a les 10:36:18, David Faure va escriure:
>> >> On Saturday 07 November 2015 11:17:31 Ben Cooksley wrote:
>> >> > Hi all,
>> >> >
>> >> > It appears the test running with the binary name of "threadtest" in
>> >> > kio has a grave bug which can lead to it entering into an infinite
>> >> > loop.
>> >> >
>> >> > This was consuming virtually the entire resources of one builder with
>> >> > old hung processes, and the whole core of another builder -
>> >> > drastically limiting the capabilities of the CI system (even though
>> >> > KIO was not being built at the time).
>> >> >
>> >> > Can someone please investigate? Manual intervention (with kill -9) is
>> >> > needed to remove these hung processes.
>> >>
>> >> It of course works fine on my own machine.
>> >>
>> >> And I just tried running it on LinuxNode2, in
>> >> ~/builds/kio/stable-kf5-qt5/build/autotests (after sourcing ~/kio.env which
>> >> I just generated), and it ran fine (multiple times).
>> >>
>> >> Any suggestion on how / where to hit the issue?
>> >
>> > I too have serious problems being able to reproduce the same results on the
>> > build nodes than CI has :(
>> >
>> > I guess we're most probably missing some step (e.g. kdelibs failing test
>> > always work when i try to reproduce it, rocs compiles fine, etc)
>>
>> Albert, did you try with the kf5-qt5 or stable-kf5-qt5 branch group?
>> It seems this is a Qt regression (and the version differs).
>
> Now I'm not sure if you guys are talking about kio's threadtest or about other
> things (kdelibs, rocs).
>
> To get back to the kio threadtest topic, it passes in a loop here, even with Qt 5.6.
>   -> sorry Oswald, false alert.
>
> So I think Nicolás Alvarez is right, this is more likely a bug in asan.
> I forgot that we had that enabled in the CI - which makes one more difference between
> our local setups and the CI ;)
>
> Ben, Albert, do we have a way to turn off asan for kio's threadtest?

Only for all of KIO, which I have now done.
Please file a bug against ASAN support (compiler bug I assume?)

Regards,
Ben

>
> --
> David Faure, faure at kde.org, http://www.davidfaure.fr
> Working on KDE Frameworks 5
>