Application: knotify4 (4.0)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-19-generic x86_64
Distribution: Ubuntu lucid (development branch)

-- Information about the crash:
Knotify error message and crash as soon as I successfully built phonon-vlc, and told KDE to make it the preferred sound back end.

Amarok runs just fine with VLC as the backend, by the way.

 -- Backtrace:
Application: KNotify (knotify4), signal: Segmentation fault
pthread_cond_timedwait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:211
	in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
[Current thread is 1 (Thread 0x7fa3c1f64760 (LWP 32590))]

Thread 13 (Thread 0x7fa3ae28e710 (LWP 32705)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:211
#1  0x00007fa3b3080081 in ?? () from /usr/lib/libxine.so.1
#2  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 12 (Thread 0x7fa3ad455710 (LWP 32706)):
[KCrash Handler]
#5  QHashDummyNode (node=0x7000000000011707, newNode=0x7fa2a9656010) at /usr/include/qt4/QtCore/qhash.h:212
#6  QHash<Phonon::Xine::SinkNode*, QHashDummyValue>::duplicateNode (node=0x7000000000011707, newNode=0x7fa2a9656010) at /usr/include/qt4/QtCore/qhash.h:527
#7  0x00007fa3c09d3b87 in QHashData::detach_helper2 (this=0x10560a0, node_duplicate=0x7fa3b32dbe00 <QHash<Phonon::Xine::SinkNode*, QHashDummyValue>::duplicateNode(QHashData::Node*, void*)>, 
    node_delete=<value optimized out>, nodeSize=<value optimized out>, nodeAlign=8) at tools/qhash.cpp:239
#8  0x00007fa3b32db176 in QHash<Phonon::Xine::SinkNode*, QHashDummyValue>::detach_helper (this=<value optimized out>) at /usr/include/qt4/QtCore/qhash.h:581
#9  QHash<Phonon::Xine::SinkNode*, QHashDummyValue>::detach (this=<value optimized out>) at /usr/include/qt4/QtCore/qhash.h:299
#10 QHash (this=<value optimized out>) at /usr/include/qt4/QtCore/qhash.h:283
#11 QSet (this=<value optimized out>) at /usr/include/qt4/QtCore/qset.h:60
#12 Phonon::Xine::SourceNode::sinks (this=<value optimized out>) at ../../xine/sourcenode.cpp:85
#13 0x00007fa3b32e7c28 in Phonon::Xine::XineStream::createStream (this=0x1202e40) at ../../xine/xinestream.cpp:512
#14 0x00007fa3b32e9f53 in Phonon::Xine::XineStream::event (this=0x1202e40, ev=0x7fa39ce94470) at ../../xine/xinestream.cpp:1241
#15 0x00007fa3bfe6522c in QApplicationPrivate::notify_helper (this=0x1026500, receiver=0x1202e40, e=0x7fa39ce94470) at kernel/qapplication.cpp:4300
#16 0x00007fa3bfe6b6fb in QApplication::notify (this=0x7fff0a4f5060, receiver=0x1202e40, e=0x7fa39ce94470) at kernel/qapplication.cpp:4183
#17 0x00007fa3c0aac06c in QCoreApplication::notifyInternal (this=0x7fff0a4f5060, receiver=0x1202e40, event=0x7fa39ce94470) at kernel/qcoreapplication.cpp:704
#18 0x00007fa3c0aae7e7 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x149e5b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x149e5b0) at kernel/qcoreapplication.cpp:1345
#20 0x00007fa3c0ad59d3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#21 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#22 0x00007fa3bc6f48c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#23 0x00007fa3bc6f8748 in ?? () from /lib/libglib-2.0.so.0
#24 0x00007fa3bc6f88fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#25 0x00007fa3c0ad5513 in QEventDispatcherGlib::processEvents (this=0x14955e0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#26 0x00007fa3c0aaa992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#27 0x00007fa3c0aaad6c in QEventLoop::exec (this=0x7fa3ad454d90, flags=) at kernel/qeventloop.cpp:201
#28 0x00007fa3c09b4d59 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#29 0x00007fa3b32dc440 in Phonon::Xine::XineThread::run (this=0x1405330) at ../../xine/xinethread.cpp:143
#30 0x00007fa3c09b7775 in QThreadPrivate::start (arg=0x1405330) at thread/qthread_unix.cpp:248
#31 0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#32 0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#33 0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7fa3a7af8710 (LWP 32715)):
#0  0x00007fa3bf6eaf93 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fa3ac63441f in ?? () from /usr/lib/libpulse.so.0
#2  0x00007fa3ac623d86 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#3  0x00007fa3ac625809 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#4  0x00007fa3ac6258c0 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#5  0x00007fa3ac63421b in ?? () from /usr/lib/libpulse.so.0
#6  0x00007fa3ac3f30e8 in ?? () from /usr/lib/libpulsecommon-0.9.21.so
#7  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#8  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7fa3ab8f3710 (LWP 32716)):
#0  0x00007fa3bf6eaf93 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=333) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fa3aca4f915 in ?? () from /usr/lib/xine/plugins/1.27/xineplug_ao_out_alsa.so
#2  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7fa3ab0f2710 (LWP 32717)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa3b3090e23 in ?? () from /usr/lib/libxine.so.1
#2  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7fa3aa2cc710 (LWP 32724)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:211
#1  0x00007fa3b3080081 in ?? () from /usr/lib/libxine.so.1
#2  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7fa3932ff710 (LWP 32750)):
#0  __pthread_mutex_lock_full (mutex=0x13e3a10) at pthread_mutex_lock.c:303
#1  0x00007fa3ac3f252e in pa_mutex_lock () from /usr/lib/libpulsecommon-0.9.21.so
#2  0x00007fa3ac634429 in ?? () from /usr/lib/libpulse.so.0
#3  0x00007fa3ac623d86 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0x00007fa3ac625809 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0x00007fa3ac6258c0 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0x00007fa3ac63421b in ?? () from /usr/lib/libpulse.so.0
#7  0x00007fa3ac3f30e8 in ?? () from /usr/lib/libpulsecommon-0.9.21.so
#8  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#9  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fa3a86e0710 (LWP 32751)):
#0  __pthread_mutex_lock_full (mutex=0x13e3a10) at pthread_mutex_lock.c:291
#1  0x00007fa3ac3f252e in pa_mutex_lock () from /usr/lib/libpulsecommon-0.9.21.so
#2  0x00007fa3ab8f6cd2 in ?? () from /usr/lib/alsa-lib/libasound_module_ctl_pulse.so
#3  0x00007fa3b380ecb8 in snd_hctl_handle_events () from /usr/lib/libasound.so.2
#4  0x00007fa3b3818a99 in snd_mixer_handle_events () from /usr/lib/libasound.so.2
#5  0x00007fa3aca4f956 in ?? () from /usr/lib/xine/plugins/1.27/xineplug_ao_out_alsa.so
#6  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#7  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fa392afe710 (LWP 32752)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa3b3090e23 in ?? () from /usr/lib/libxine.so.1
#2  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fa393b00710 (LWP 32762)):
#0  0x00007fa3bf6eaf93 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fa3ac63441f in ?? () from /usr/lib/libpulse.so.0
#2  0x00007fa3ac623d86 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#3  0x00007fa3ac625809 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#4  0x00007fa3ac6258c0 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#5  0x00007fa3ac63421b in ?? () from /usr/lib/libpulse.so.0
#6  0x00007fa3ac3f30e8 in ?? () from /usr/lib/libpulsecommon-0.9.21.so
#7  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#8  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fa38dafb710 (LWP 32763)):
#0  0x00007fa3bf6eaf93 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=333) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fa3aca4f915 in ?? () from /usr/lib/xine/plugins/1.27/xineplug_ao_out_alsa.so
#2  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fa38d2fa710 (LWP 32764)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa3b3090e23 in ?? () from /usr/lib/libxine.so.1
#2  0x00007fa3bddbb9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#3  0x00007fa3bf6f76dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa3c1f64760 (LWP 32590)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:211
#1  0x00007fa3c09b70e5 in thread_sleep (ti=0x7fff0a4f4e80) at thread/qthread_unix.cpp:398
#2  0x00007fa3c09b7250 in QThread::msleep (msecs=<value optimized out>) at thread/qthread_unix.cpp:424
#3  0x00007fa3b3303b8a in ~Backend (this=0x142db10, __in_chrg=<value optimized out>) at ../../xine/backend.cpp:111
#4  0x00007fa3c1502846 in ~FactoryPrivate (this=0x11a9f80, __in_chrg=<value optimized out>) at ../3rdparty/phonon/phonon/factory.cpp:218
#5  0x00007fa3c0aac5a6 in qt_call_post_routines () at kernel/qcoreapplication.cpp:201
#6  0x00007fa3bfe6e308 in ~QApplication (this=0x7fff0a4f5060, __in_chrg=<value optimized out>) at kernel/qapplication.cpp:1016
#7  0x0000000000407f62 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../knotify/main.cpp:73

Reported using DrKonqi