Review Request 128406: KCollapsibleGroupBox: Stop animation if still running in destructor

David Faure faure at kde.org
Fri Jul 8 19:32:29 UTC 2016


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Can you try to adapt the failing unittest into a new kwidgetsaddons unittest, so that this change is unittested here too?

- David Faure


On July 8, 2016, 7:29 p.m., Ragnar Thomsen wrote:
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> https://git.reviewboard.kde.org/r/128406/
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> (Updated July 8, 2016, 7:29 p.m.)
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> Review request for KDE Frameworks, David Edmundson and Elvis Angelaccio.
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> Repository: kwidgetsaddons
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> Description
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> We are using KCollapsibleGroupBox in Ark and stumbled upon a segfault in an autotest involving this widget (see backtrace [here](https://paste.kde.org/pwcohd64z)). It looks like QTimeLine::stop() gets called after KCollapsibleGroupBox is deleted. This causes QTimeLine::stateChanged to get emitted which then calls KCollapsibleGroupBox::updateChildrenVisibility() that causes the crash.
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> To see the crash, clone the newAddDialog branch of Ark and run the autotests.
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> This diff calls QTimeLine::stop() in the KCollapsibleGroupBox dtor if it is running, before deleting the d pointer.
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> Diffs
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>   src/kcollapsiblegroupbox.cpp 0c3f866 
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> Diff: https://git.reviewboard.kde.org/r/128406/diff/
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> Testing
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> The autotests in newAddDialog branch of Ark pass with this diff.
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> Thanks,
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> Ragnar Thomsen
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