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

[Ragnar Thomsen]

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https://git.reviewboard.kde.org/r/128406/
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(Updated July 15, 2016, 6:13 p.m.)


Review request for KDE Frameworks, Kai Uwe Broulik, David Edmundson, and Elvis Angelaccio.


Changes
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Connect to deleteLater() directly, instead of using lambda function. Thanks Broulik :)


Repository: kwidgetsaddons


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.

To see the crash, clone the newAddDialog branch of Ark and run the autotests.

This diff calls QTimeLine::stop() in the KCollapsibleGroupBox dtor if it is running, before deleting the d pointer.


Diffs (updated)
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  autotests/CMakeLists.txt 4be2eaf 
  autotests/kcollapsiblegroupbox_test.h PRE-CREATION 
  autotests/kcollapsiblegroupbox_test.cpp PRE-CREATION 
  src/kcollapsiblegroupbox.cpp 0c3f866 

Diff: https://git.reviewboard.kde.org/r/128406/diff/


Testing
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The autotests in newAddDialog branch of Ark pass with this diff.


Thanks,

Ragnar Thomsen

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