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

[Ragnar Thomsen]

> On July 8, 2016, 9:32 p.m., David Faure wrote:
> > Can you try to adapt the failing unittest into a new kwidgetsaddons unittest, so that this change is unittested here too?

Sure :)


- Ragnar


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On July 8, 2016, 9:29 p.m., Ragnar Thomsen wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/128406/
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> 
> (Updated July 8, 2016, 9:29 p.m.)
> 
> 
> Review request for KDE Frameworks, David Edmundson and Elvis Angelaccio.
> 
> 
> 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
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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.
> 
> 
> Thanks,
> 
> Ragnar Thomsen
> 
>

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