Application: knotify4 (4.0)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.2.0-2-rt-amd64 x86_64
Distribution: Ubuntu maverick (development branch)

-- Information about the crash:
- What I was doing when the application crashed:

I have a dual screen display and was fiddling with the display setup after having booted into a RT kernel for the first time. My hunch is that something is not right as the system's I/O is very slow. Whatever exceptional it is - knotify should not crash, so maybe this indicates some larger problem somewhere.

Other than shown, the system is  Debian unstable, running KDE 4.7.4.

The crash can be reproduced some of the time.

-- Backtrace:
Application: KNotify (knotify4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f83a4508760 (LWP 4902))]

Thread 2 (Thread 0x7f8393006700 (LWP 4906)):
#0  0x00007f83a16cbcc3 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f839ee145d8 in g_main_context_poll (n_fds=1, fds=0x7f838c001b60, timeout=-1, context=0x26a26d0, priority=<optimized out>) at /tmp/buildd/glib2.0-2.30.2/./glib/gmain.c:3391
#2  g_main_context_iterate (context=0x26a26d0, block=<optimized out>, dispatch=1, self=<optimized out>) at /tmp/buildd/glib2.0-2.30.2/./glib/gmain.c:3071
#3  0x00007f839ee14a99 in g_main_context_iteration (context=0x26a26d0, may_block=1) at /tmp/buildd/glib2.0-2.30.2/./glib/gmain.c:3139
#4  0x00007f83a1e17e96 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#5  0x00007f83a1dec492 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#6  0x00007f83a1dec68f in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#7  0x00007f83a1d0430f in QThread::exec() () from /usr/lib/libQtCore.so.4
#8  0x00007f83a1dcf35f in QInotifyFileSystemWatcherEngine::run() () from /usr/lib/libQtCore.so.4
#9  0x00007f83a1d06cf5 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#10 0x00007f839f2e4b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
#11 0x00007f83a16d690d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f83a4508760 (LWP 4902)):
[KCrash Handler]
#6  0x00007f83a1ddae50 in QLibrary::unload() () from /usr/lib/libQtCore.so.4
#7  0x00007f83920dc68c in LibVLC::vlcUnload (this=0x25b4120) at ../../src/utils/libvlc.cpp:270
#8  0x00007f83920dc6ca in LibVLC::~LibVLC (this=0x25b4120, __in_chrg=<optimized out>) at ../../src/utils/libvlc.cpp:45
#9  0x00007f83920d0a48 in Phonon::VLC::Backend::~Backend (this=0x25c1220, __in_chrg=<optimized out>) at ../../src/backend.cpp:122
#10 0x00007f83920d0ac9 in Phonon::VLC::Backend::~Backend (this=0x25c1220, __in_chrg=<optimized out>) at ../../src/backend.cpp:130
#11 0x00007f83a3a4765f in Phonon::FactoryPrivate::~FactoryPrivate (this=0x26aaa80, __in_chrg=<optimized out>) at ../../phonon/factory.cpp:242
#12 0x00007f83a3a477f9 in Phonon::FactoryPrivate::~FactoryPrivate (this=0x26aaa80, __in_chrg=<optimized out>) at ../../phonon/factory.cpp:246
#13 0x00007f83a1defc78 in qt_call_post_routines() () from /usr/lib/libQtCore.so.4
#14 0x00007f83a2a5d368 in QApplication::~QApplication() () from /usr/lib/libQtGui.so.4
#15 0x000000000040a16d in main (argc=1, argv=0x7fff10eb8ed8) at ../../knotify/main.cpp:73

Reported using DrKonqi