[Qt-interest] Segmentation Fault in QWidget::Show() after upgrading to version 4.6.2-4 (on debian)

Constantin Makshin cmakshin at gmail.com
Wed May 5 21:03:56 CEST 2010


I have two Debian testing systems with Qt 4.6.2 installed from official Debian repositories (so it's 4.6.2-4) and haven't had any problems with QWidget::show(). Moreover, it's so widely used function (in fact, *every* Qt GUI application uses it :) ) that if there was such bug, it would have been found by someone else a long time ago.

Could you create a small program that has the same bug on your system to let other people test it on their systems?

On Tue, 04 May 2010 14:25:37 +0400, Vincent Hobeïka <vincent.hobeika at ens-lyon.fr> wrote:
> Hi,
>
> On Monday 03 May 2010 18:08:33 Vincent Hobeïka wrote:
>> I recently upgraded my debian packages and especially libqt4-dev to version
>> 4.6.2-4.
>>
>> Since then, I am having troubles with a project. It crashes at startup with
>> a segmentation fault. I have dug into it with gdb and found it is related
>> to QWidget::Show().
>
> I have downgraded libqt4-dev to version 4.3.1, commented unsupported things
> like QKeySequence::SaveAs and it is working again. So I guess there is a
> problem with version 4.6.2-4 (which wasn't there in 4.5).
>
> I hope it may help in a way.
>
> Best regards.

-- 
Constantin Makshin



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