(gdb) bt
#0  0x00007ffff44e3975 in raise () from /lib/libc.so.6
#1  0x00007ffff44e4deb in abort () from /lib/libc.so.6
#2  0x00007ffff540a474 in qt_message_output(QtMsgType, char const*) () from /usr/lib/libQtCore.so.4
#3  0x00007ffff540a62f in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007ffff540a7d4 in qFatal(char const*, ...) () from /usr/lib/libQtCore.so.4
#5  0x0000000000651226 in ?? ()
#6  0x0000000000648a33 in ?? ()
#7  0x000000000063e0b9 in ?? ()
#8  0x000000000063bcae in ?? ()
#9  0x000000000063b4a4 in ?? ()
#10 0x000000000073c865 in ?? ()
#11 0x0000000000748468 in ?? ()
#12 0x0000000000721ab8 in ?? ()
#13 0x00000000007474c9 in ?? ()
#14 0x00000000007476a0 in ?? ()
#15 0x000000000072074a in ?? ()
#16 0x00000000008d91f5 in ?? ()
#17 0x00007ffff5525f11 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) ()
   from /usr/lib/libQtCore.so.4
#18 0x00000000008dbd65 in ?? ()
#19 0x00000000005ddbee in ?? ()
#20 0x00000000008db51a in ?? ()
#21 0x00007ffff5525f11 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) ()
   from /usr/lib/libQtCore.so.4
#22 0x00007ffff5d71412 in QAction::triggered(bool) () from /usr/lib/libQtGui.so.4
#23 0x00007ffff5525f11 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) ()
   from /usr/lib/libQtCore.so.4
#24 0x00000000008dc479 in ?? ()
#25 0x00000000005e48d0 in ?? ()
#26 0x00007ffff5dc7f7e in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007ffff6184146 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#28 0x00007ffff5d778c4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#29 0x00007ffff5d7d013 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#30 0x00000000006a6806 in ?? ()
#31 0x00007ffff551206c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#32 0x00007ffff5d78892 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/libQtGui.so.4
#33 0x00007ffff5df4b85 in ?? () from /usr/lib/libQtGui.so.4
#34 0x00007ffff5df3a4a in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#35 0x00007ffff5e1b292 in ?? () from /usr/lib/libQtGui.so.4
#36 0x00007ffff39dc8bd in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#37 0x00007ffff39dd0b8 in ?? () from /usr/lib/libglib-2.0.so.0
#38 0x00007ffff39dd289 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#39 0x00007ffff55410bf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#40 0x00007ffff5e1af1e in ?? () from /usr/lib/libQtGui.so.4
#41 0x00007ffff5510e52 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#42 0x00007ffff55110a7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#43 0x00007ffff5515c05 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#44 0x00000000008ca1e4 in ?? ()
#45 0x00007ffff44d038d in __libc_start_main () from /lib/libc.so.6
#46 0x0000000000468269 in ?? ()
#47 0x00007fffffffe1d8 in ?? ()
#48 0x00000000ffffffff in ?? ()
#49 0x0000000000000001 in ?? ()
#50 0x00007fffffffe545 in ?? ()
#51 0x0000000000000000 in ?? ()
(gdb) q
A debugging session is active.

	Inferior 1 [process 7633] will be killed.

Quit anyway? (y or n) y
>>                                                                                                               ~/ :)