https://bugs.kde.org/show_bug.cgi?id=355009
--- Comment #4 from Ralf Habacker <ralf.habac...@freenet.de> ---
>#7 0xffffffff in __dynamic_cast () at /lib/libstdc++.so.6
>#8 0x082bd338 in ClassifierWidget::paint(QPainter*, QStyleOptionGraphicsItem
>const*, QWidget*) ()
The callstack indicates that the crash happens somewhere in
ClassifierWidget::paint() performing an invalid dynamic cast.
An invalid cast is performed in classifier() called at line 672:
UMLClassifier *umlc = this->classifier();
which expands to
return dynamic_cast<UMLClassifier*>(m_umlObject);
Stackoverflow mentioned several reasons for crashing dynamic cast here
http://stackoverflow.com/questions/278429/what-could-cause-a-dynamic-cast-to-crash.
The most common reason for such issues is that the related m_umlObject has been
destroyed, which we can catch with QPointer.
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