[PyKDE] Segmentation fault with latest snapshot of sip & PyQt

[Gordon Tyler]

Gordon Tyler wrote:
> I'm going to poke around the KDE source for the HighCOlor plugin to see 
> if I can figure out what it's doing when it calls into libstdc++.

Looking at kdelibs/kstyles/highcolor/highcolor.cpp in the 
HighColorStyle::eventFilter() method, the following statement occurs 
near the beginning of the method:

bool HighColorStyle::eventFilter( QObject *object, QEvent *event )
{
	...

	QPushButton* button = dynamic_cast<QPushButton*>(object);


Here's the backtrace again:

#0  0x400f9a93 in __dynamic_cast () from /usr/lib/libstdc++.so.5
#1  0x414b561f in HighColorStyle::eventFilter ()
    from /usr/lib/kde3/plugins/styles/highcolor.so
#2  0x4048cb10 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#3  0x4048c9f1 in QObject::event () from /usr/lib/libqt-mt.so.3
#4  0x404b9375 in QWidget::event () from /usr/lib/libqt-mt.so.3
#5  0x411b3341 in sipQPushButton::event (this=0x82c8a90, a0=0x82c9758)
     at sipqtQRadioButton.cpp:3382
#6  0x4043c4da in QApplication::internalNotify () from 
/usr/lib/libqt-mt.so.3
#7  0x4043c2e4 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#8  0x413fabb4 in sipQApplication::notify (this=0x824a5f8, a0=0x82c8a90,
     a1=0x82c9758) at sipqtQApplication.cpp:221
#9  0x4043d1bd in QApplication::sendPostedEvents () from
/usr/lib/libqt-mt.so.3
#10 0x404b8e1f in QWidget::polish () from /usr/lib/libqt-mt.so.3
#11 0x411b46ee in sipQPushButton::polish (this=0x82c8a90)
     at sipqtQRadioButton.cpp:3709
#12 0x4055b52b in QPushButton::sizeHint () from /usr/lib/libqt-mt.so.3
#13 0x411b9f7e in sipDo_QPushButton_sizeHint (sipThisObj=0x82cfbb0,
     sipArgs=0x810c0cc) at sipqtQPushButton.cpp:2818

Since the backtrace involves QPushButton, it would seem that this line 
in highcolor.cpp is probably causing the segfault. Any ideas why?

Ciao,
Gordon