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List:       kde-devel
Subject:    Update: Re: Crash: Qt4.3 bug
From:       Kleag <kleag () free ! fr>
Date:       2007-04-30 21:53:09
Message-ID: 200704302353.09867.kleag () free ! fr
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Hello,

After a month of search, I was able to find the code which makes crash KsirK 
in playground. This code is in qt-copy. It was added between Qt 4.2.3 and Qt 
4.3.0 between releases 646832 and 641769. This is this code:
 void QMainWindowLayout::animationFinished(QWidget *widget)
 {
+#ifndef QT_NO_TOOLBAR
+    if (QToolBar *tb = qobject_cast<QToolBar*>(widget)) {
+        QToolBarLayout *tbl = qobject_cast<QToolBarLayout*>(tb->layout());
+        if (tbl->expanded && tbl->collapsing) {
+            tbl->expanded = false;
+            tbl->collapsing = false;
+            tbl->invalidate();
+            tb->update();
+        }
+    }
+#endif
+
     if (widget != pluggingWidget)
         return;

If I comment it out, my app works again.

I have no idea why it happens, particularly because I use only two KToolBar 
that are never deleted. So, you see that I'm not really able to propose a 
patch. I still don't know if the real problem comes from my code or from KDE 
or Qt. 
Any idea or advice ?

Regards,

Kleag



Le samedi 31 mars 2007, Kleag a écrit  :
> Hello,
>
> Since I rebuilt KDE4 from scratch after the switch to Qt 4.3 (with
> kdesvn-build), I have a crash in my app: at the moment it displays a
> dialog, it crashes. This is inside the Qt event loop and I cannot find
> what is the cause. All what I found is this problem report (march 7) on a
> TT mailing list that got no answer, it seems:
> http://lists.trolltech.com/qt4-preview-feedback/2007-03/thread00016-0.html
>
> Could anybody help here ? I put below the stack trace.
>
> Regards,
>
> Kleag



-- 
KsirK - a turn-based strategy game for KDE
http://gna.org/projects/ksirk

KGraphViewer - a GraphViz dot graphs viewer
http://extragear.kde.org/apps/kgraphviewer
 
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