KDE detected X Error: BadDrawable (invalid Pixmap or Window parameter) 9
  Major opcode:  62
bitBlt: Cannot bitBlt to or from device
bitBlt: Cannot bitBlt to or from device
bitBlt: Cannot bitBlt to or from device
[...]

Program received signal SIGSEGV, Segmentation fault.
0x4062769c in XCopyArea () from /usr/X11R6/lib/libX11.so.6
(gdb) bt
#0  0x4062769c in XCopyArea () from /usr/X11R6/lib/libX11.so.6
#1  0x4037717c in bitBlt () from /usr/local/lib/qt/lib/libqt.so.2
#2  0x400d082d in KThemeStyle::drawBaseButton ()
   from /usr/local/kde2/lib/libkdeui.so.3
#3  0x400d0a83 in KThemeStyle::drawButton ()
   from /usr/local/kde2/lib/libkdeui.so.3
#4  0x400d0b3a in KThemeStyle::drawPushButton ()
   from /usr/local/kde2/lib/libkdeui.so.3
#5  0x4047f75c in QPushButton::drawButton ()
   from /usr/local/lib/qt/lib/libqt.so.2
#6  0x404394bf in QButton::paintEvent () from /usr/local/lib/qt/lib/libqt.so.2
#7  0x404361a6 in QWidget::event () from /usr/local/lib/qt/lib/libqt.so.2
#8  0x403c6dba in QApplication::notify () from /usr/local/lib/qt/lib/libqt.so.2
#9  0x40382729 in QWidget::repaint () from /usr/local/lib/qt/lib/libqt.so.2
#10 0x40439808 in QButton::nextState () from /usr/local/lib/qt/lib/libqt.so.2
#11 0x40439261 in QButton::mouseReleaseEvent ()
   from /usr/local/lib/qt/lib/libqt.so.2
#12 0x404361a6 in QWidget::event () from /usr/local/lib/qt/lib/libqt.so.2
#13 0x403c6dba in QApplication::notify () from /usr/local/lib/qt/lib/libqt.so.2
#14 0x4035fefc in QETWidget::translateMouseEvent ()
   from /usr/local/lib/qt/lib/libqt.so.2
#15 0x4035d992 in QApplication::x11ProcessEvent ()
   from /usr/local/lib/qt/lib/libqt.so.2
#16 0x4035cba7 in QApplication::processNextEvent ()
   from /usr/local/lib/qt/lib/libqt.so.2
#17 0x403c7f25 in QApplication::enter_loop ()
   from /usr/local/lib/qt/lib/libqt.so.2
#18 0x4035cb48 in QApplication::exec () from /usr/local/lib/qt/lib/libqt.so.2
#19 0x8058898 in main ()