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

[Albert Astals Cid]

El Monday 09 November 2015, a les 08:30:14, David Faure va escriure:
> 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).

I was talking about how hard is for me to reproduce the test failures even 
when running on CI, I thought you had this too, ended up being a different 
thing.

Cheers,
  Albert

> 
> 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?