#0  0xb77ae424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb77ae424 in __kernel_vsyscall ()
#1  0xb3c20751 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb3c23b82 in *__GI_abort () at abort.c:92
#3  0x08162182 in myMessageOutput (type=QtFatalMsg, msg=0xa3781d8 "QGIS died on signal 11")
    at /home/radim/devel/qgis/src/app/main.cpp:263
#4  0xb4c66f65 in qt_message_output(QtMsgType, char const*) () from /usr/lib/libQtCore.so.4
#5  0xb4c6716a in ?? () from /usr/lib/libQtCore.so.4
#6  0xb4c67279 in qFatal(char const*, ...) () from /usr/lib/libQtCore.so.4
#7  0x08161ef6 in qgisCrash (signal=11) at /home/radim/devel/qgis/src/app/main.cpp:201
#8  <signal handler called>
#9  0xb431ce99 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#10 0xb431d7b5 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#11 0xb431c6c5 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#12 0xb431d7b5 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#13 0xb431c6c5 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#14 0xb431d7b5 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#15 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#16 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#17 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#18 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#19 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#20 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#21 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#22 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#23 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&---Type <return> to continue, or q <return> to quit--- 
, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#24 0xb431d5ee in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#25 0xb431c6c5 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#26 0xb44f25d4 in ?? () from /usr/lib/libQtGui.so.4
#27 0xb430d173 in QWidgetPrivate::syncBackingStore() () from /usr/lib/libQtGui.so.4
#28 0xb433a7fe in ?? () from /usr/lib/libQtGui.so.4
#29 0xb4345816 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#30 0xb4374372 in ?? () from /usr/lib/libQtGui.so.4
#31 0xb2d9a305 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#32 0xb2d9dfe8 in ?? () from /lib/libglib-2.0.so.0
#33 0xb2d9e1c8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#34 0xb4d98075 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
    () from /usr/lib/libQtCore.so.4
#35 0xb4373ed5 in ?? () from /usr/lib/libQtGui.so.4
#36 0xb4d6aae9 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#37 0xb4d6af3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#38 0xb4d7016f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#39 0xb42b5667 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#40 0x08165ea5 in main (argc=1, argv=0xbfcc49f4)
    at /home/radim/devel/qgis/src/app/main.cpp:998