[Konsole-devel] Review Request 127626: Fix crash when KDBusService exits

Martin Tobias Holmedahl Sandsmark martin.sandsmark at kde.org
Sun Apr 10 16:33:01 UTC 2016



> On April 10, 2016, 4:29 p.m., David Faure wrote:
> > 1) is this fixed by applying the QPixmapCache fix in Qt itself? (git cherry-pick be926e412c9c4ec9ee77b49dbe370fbb5451f0e1). It's in Qt 5.6.0 though.
> > 2) do you feel like writing a test app for kdbusservice (or even an autotest) that reproduces the issue? I wonder why the existing autotest doesn't hit this. I tried linking to Qt5::Widgets, didn't make a difference. But well, I have Qt 5.6, so if it's the above commit, no wonder.

This is with 5.6.0. It doesn't crash 100% of the time, it is a bit spurious (it is a race condition as far as I can tell), and maybe it depends on some other part of the system or something.

I'll try to write a proper autotest.


- Martin Tobias Holmedahl


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On April 10, 2016, 3:29 p.m., Martin Tobias Holmedahl Sandsmark wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/127626/
> -----------------------------------------------------------
> 
> (Updated April 10, 2016, 3:29 p.m.)
> 
> 
> Review request for Konsole, David Faure and Kurt Hindenburg.
> 
> 
> Repository: konsole
> 
> 
> Description
> -------
> 
> Fix crash when KDBusService exits.
> 
> This is a bit of an ugly workaround, but it seems to work.
> 
> I'll paste in my comment from https://git.reviewboard.kde.org/r/127625/ here:
> 
>     It seems like it is this that it happening: https://bugreports.qt.io/browse/QTBUG-48709
> 
>     From my understanding it can't really be fixed, short of somehow getting KDBusService to delete the QApplication before calling exit(), which might get nasty with QApplications allocated on the stack?
> 
>     In any case it seems to be a general bug with KDBusService and how it is supposed to be used, not something that we can easily fix in konsole.
> 
> 
> Diffs
> -----
> 
>   src/main.cpp 5e1420e37363454cf5e7886a82381cb9eb4447d8 
> 
> Diff: https://git.reviewboard.kde.org/r/127626/diff/
> 
> 
> Testing
> -------
> 
> Tested by forcing it to open a new window in an existing session (commenting out line 237 in main.cpp), and running under valgrind to verify the deletion.
> 
> 
> Thanks,
> 
> Martin Tobias Holmedahl Sandsmark
> 
>

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