Review Request 118858: Fix crashes in KUrlNavigator that are caused by accesses to objects which have been deleted in nested event loops

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This review has been submitted with commit f1196e8e9a94993e4d748d283d869c4ad205ff02 by Frank Reininghaus to branch KDE/4.13.

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On June 22, 2014, 7:58 a.m., Frank Reininghaus wrote:
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> (Updated June 22, 2014, 7:58 a.m.)
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> Review request for kdelibs.
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> Bugs: 293863
>     http://bugs.kde.org/show_bug.cgi?id=293863
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> Repository: kdelibs
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> Description
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> KUrlNavigator opens menus with exec() in a few places, and accesses member variables or pointers to children after that. This can cause crashes if the object has been deleted inside the nested event loops.
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> This can be fixed by using QPointers to detect if an object was deleted already, and return immediately in that case.
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> Diffs
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>   kfile/kurlnavigator.cpp f5dfc81 
>   kfile/kurlnavigatorbutton.cpp 6cb40b1 
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> Diff: https://git.reviewboard.kde.org/r/118858/diff/
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> Testing
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> Cannot reproduce the crashes any more. The menus in KUrlNavigator still work fine for me.
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> Thanks,
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> Frank Reininghaus
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