Review Request: Prevent crash in KJob::emitResult() if job is deleted

[Aurélien Gâteau]

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http://svn.reviewboard.kde.org/r/6022/
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(Updated 2010-12-02 16:51:19.493828)


Review request for kdelibs and Kevin Ottens.


Changes
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Print a warning when job has already been deleted.


Summary
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If a someone calls "delete job" on a slot connected to the KJob::result() signal, KJob crashes because the job does not exist anymore when execution comes back to KJob::emitResult(). I added a guard to prevent that. An alternative would be to call deleteLater() before emitting the signals but I was afraid it would cause trouble if slots connected to the emitted signals used event loops.


This addresses bug 241562.
    https://bugs.kde.org/show_bug.cgi?id=241562


Diffs (updated)
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  trunk/KDE/kdelibs/kdecore/jobs/kjob.cpp 1202165 
  trunk/KDE/kdelibs/kdecore/tests/kjobtest.h 1202165 
  trunk/KDE/kdelibs/kdecore/tests/kjobtest.cpp 1202165 

Diff: http://svn.reviewboard.kde.org/r/6022/diff


Testing
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Wrote a unit-test to demonstrate the problem. This also helps with bug #241562 although I have another request prepared to hopefully definitely nail it down.


Thanks,

Aurélien

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