faustov@ryba2 ~ % gdb kvirc
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This GDB was configured as "x86_64-pc-linux-gnu"...
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Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /usr/bin/kvirc 
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[Thread debugging using libthread_db enabled]
[New Thread 46918636050560 (LWP 17243)]
FOCUS IN EVENT TO KviWindow
ACTIVATING SELF
FOCUS IN EVENT TO KviWindow
ACTIVE WINDOW IS ALREADY THIS
FOCUS IN EVENT TO KviWindow
ACTIVATING SELF
[New Thread 1082132800 (LWP 17246)]
[New Thread 1090525504 (LWP 17247)]
[Thread 1090525504 (LWP 17247) exited]
[Thread 1082132800 (LWP 17246) exited]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 46918636050560 (LWP 17243)]
0x00002aac15da7475 in QFontMetrics::width () from /usr/qt/3/lib/libqt-mt.so.3
(gdb) backtrace 
#0  0x00002aac15da7475 in QFontMetrics::width () from /usr/qt/3/lib/libqt-mt.so.3
#1  0x00000000005cadbe in KviIrcView::calculateLineWraps ()
#2  0x00000000005cc4af in KviIrcView::fastScroll ()
#3  0x00000000005d7c43 in KviIrcView::appendLine ()
#4  0x00000000005d7fb0 in KviIrcView::appendText ()
#5  0x000000000061511e in KviWindow::internalOutput ()
#6  0x0000000000618360 in KviWindow::output ()
#7  0x00000000004e9a02 in KviIrcConnection::loginToIrcServer ()
#8  0x00000000004f51bb in KviIrcLink::socketStateChange ()
#9  0x00000000004f5877 in KviIrcSocket::linkUp ()
#10 0x00000000004f7d0a in KviIrcSocket::writeNotifierFired ()
#11 0x000000000061cded in KviIrcSocket::qt_invoke ()
#12 0x00002aac15e4517c in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#13 0x00002aac15e45834 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#14 0x00002aac15e5f27b in QSocketNotifier::event () from /usr/qt/3/lib/libqt-mt.so.3
#15 0x00002aac15dee9dd in QApplication::internalNotify () from /usr/qt/3/lib/libqt-mt.so.3
#16 0x00002aac15def438 in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#17 0x00002aac15de4413 in QEventLoop::activateSocketNotifiers () from /usr/qt/3/lib/libqt-mt.so.3
#18 0x00002aac15da55f6 in QEventLoop::processEvents () from /usr/qt/3/lib/libqt-mt.so.3
#19 0x00002aac15e03073 in QEventLoop::enterLoop () from /usr/qt/3/lib/libqt-mt.so.3
#20 0x00002aac15e02f22 in QEventLoop::exec () from /usr/qt/3/lib/libqt-mt.so.3
#21 0x00000000004fba5f in main ()
(gdb)