Application: amarok (2.5.0)
KDE Platform Version: 4.8.4 (4.8.4)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-26-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
I created a playlist, selected  "Playlist->Export playlist as" and entered a filename (ending .m3u) and Amarok crashed. The .m3u file was created by was empty. THis happens every time I try it on this machine.

The crash can be reproduced every time.

-- Backtrace:
Application: Amarok (amarok), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6660747780 (LWP 28608))]

Thread 10 (Thread 0x7f663e257700 (LWP 28611)):
#0  0x00007f665d040b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6657c40036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6657c40164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f665d9d7426 in QEventDispatcherGlib::processEvents (this=0x7f6638000900, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f665d9a6c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f665d9a6ed7 in QEventLoop::exec (this=0x7f663e256dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f665d8a5fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f665d9869ff in QInotifyFileSystemWatcherEngine::run (this=0x1b6fa70) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x1b6fa70) at thread/qthread_unix.cpp:298
#9  0x00007f665975de9a in start_thread (arg=0x7f663e257700) at pthread_create.c:308
#10 0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7f6637bd3700 (LWP 28612)):
#0  0x00007f665d040b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6657c40036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6657c40164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f665d9d7426 in QEventDispatcherGlib::processEvents (this=0x7f66300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f665d9a6c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f665d9a6ed7 in QEventLoop::exec (this=0x7f6637bd2e00, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f665d8a5fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x1e3b280) at thread/qthread_unix.cpp:298
#8  0x00007f665975de9a in start_thread (arg=0x7f6637bd3700) at pthread_create.c:308
#9  0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7f6636733700 (LWP 28613)):
#0  0x00007f665d05a0d4 in pthread_mutex_lock (mutex=0x7f6628000a60) at forward.c:182
#1  0x00007f6657c7b5a1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6657c3f1df in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6657c3ff04 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6657c40164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f665d9d7426 in QEventDispatcherGlib::processEvents (this=0x7f66280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f665d9a6c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f665d9a6ed7 in QEventLoop::exec (this=0x7f6636732e00, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f665d8a5fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x1e6d7b0) at thread/qthread_unix.cpp:298
#10 0x00007f665975de9a in start_thread (arg=0x7f6636733700) at pthread_create.c:308
#11 0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f6635326700 (LWP 28615)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f665d8a94db in wait (time=18446744073709551615, this=0x1ebc650) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ebc7d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f665acf20eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1ebc500, th=0x1ebe410) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f665acf49db in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x1ebe410) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f665acf49f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x1ebe410) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f665acf49f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x1ebe410) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007f665acf49f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x1ebe410) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#8  0x00007f665acf384f in ThreadWeaver::ThreadRunHelper::run (this=0x7f6635325e20, parent=0x1ebc500, th=0x1ebe410) at ../../../threadweaver/Weaver/Thread.cpp:87
#9  0x00007f665acf38db in ThreadWeaver::Thread::run (this=0x1ebe410) at ../../../threadweaver/Weaver/Thread.cpp:142
#10 0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x1ebe410) at thread/qthread_unix.cpp:298
#11 0x00007f665975de9a in start_thread (arg=0x7f6635326700) at pthread_create.c:308
#12 0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f6627975700 (LWP 28616)):
#0  read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6657c7a8cf in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6657c3fba4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6657c3ffd6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6657c40164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f665d9d7426 in QEventDispatcherGlib::processEvents (this=0x7f661c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f665d9a6c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f665d9a6ed7 in QEventLoop::exec (this=0x7f6627974dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f665d8a5fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f665d9869ff in QInotifyFileSystemWatcherEngine::run (this=0x21757a0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x21757a0) at thread/qthread_unix.cpp:298
#11 0x00007f665975de9a in start_thread (arg=0x7f6627975700) at pthread_create.c:308
#12 0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f6626d4c700 (LWP 28617)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f665d8a94db in wait (time=18446744073709551615, this=0x1ebc650) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ebc7d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f665acf20eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1ebc500, th=0x2260d60) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f665acf49db in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x2260d60) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f665acf49f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x2260d60) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f665acf384f in ThreadWeaver::ThreadRunHelper::run (this=0x7f6626d4be20, parent=0x1ebc500, th=0x2260d60) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007f665acf38db in ThreadWeaver::Thread::run (this=0x2260d60) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x2260d60) at thread/qthread_unix.cpp:298
#9  0x00007f665975de9a in start_thread (arg=0x7f6626d4c700) at pthread_create.c:308
#10 0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f662654b700 (LWP 28618)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f665d8a94db in wait (time=18446744073709551615, this=0x1ebc650) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ebc7d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f665acf20eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1ebc500, th=0x225f060) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f665acf49db in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x225f060) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f665acf49f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x225f060) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f665acf384f in ThreadWeaver::ThreadRunHelper::run (this=0x7f662654ae20, parent=0x1ebc500, th=0x225f060) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007f665acf38db in ThreadWeaver::Thread::run (this=0x225f060) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x225f060) at thread/qthread_unix.cpp:298
#9  0x00007f665975de9a in start_thread (arg=0x7f662654b700) at pthread_create.c:308
#10 0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f6625d4a700 (LWP 28619)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f665d8a94db in wait (time=18446744073709551615, this=0x1ebc650) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ebc7d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f665acf20eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1ebc500, th=0x2210df0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f665acf49db in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ebc8a0, th=0x2210df0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f665acf384f in ThreadWeaver::ThreadRunHelper::run (this=0x7f6625d49e20, parent=0x1ebc500, th=0x2210df0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f665acf38db in ThreadWeaver::Thread::run (this=0x2210df0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f665d8a8fcb in QThreadPrivate::start (arg=0x2210df0) at thread/qthread_unix.cpp:298
#8  0x00007f665975de9a in start_thread (arg=0x7f6625d4a700) at pthread_create.c:308
#9  0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6624924700 (LWP 28622)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f6659d37222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f6659d37259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f665975de9a in start_thread (arg=0x7f6624924700) at pthread_create.c:308
#4  0x00007f665d04c4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6660747780 (LWP 28608)):
[KCrash Handler]
#6  0x00007f665f561f81 in Playlists::M3UPlaylist::save (this=<optimized out>, location=..., relative=false) at ../../src/core-impl/playlists/types/file/m3u/M3UPlaylist.cpp:234
#7  0x00007f665f56e7dc in Playlists::exportPlaylistFile (list=..., path=..., relative=false, queued=...) at ../../src/core-impl/playlists/types/file/PlaylistFileSupport.cpp:184
#8  0x00007f665f48c648 in Playlist::ProxyBase::exportPlaylist (this=0x1e72d40, path=..., relative=false) at ../../src/playlist/proxymodels/ProxyBase.cpp:107
#9  0x00007f665f745c47 in MainWindow::exportPlaylist (this=<optimized out>) at ../../src/MainWindow.cpp:515
#10 0x00007f665f751c25 in MainWindow::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./MainWindow.moc:116
#11 0x00007f665d9bc281 in QMetaObject::activate (sender=0x1fc4740, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff771046f0) at kernel/qobject.cpp:3547
#12 0x00007f665e39c132 in QAction::triggered (this=<optimized out>, _t1=false) at .moc/release-shared/moc_qaction.cpp:277
#13 0x00007f665e39c31f in QAction::activate (this=0x1fc4740, event=<optimized out>) at kernel/qaction.cpp:1257
#14 0x00007f665e7ee119 in QMenuPrivate::activateCausedStack (this=0x216e4e0, causedStack=..., action=0x1fc4740, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1028
#15 0x00007f665e7f4272 in QMenuPrivate::activateAction (this=0x216e4e0, action=0x1fc4740, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1120
#16 0x00007f66602072d0 in KMenu::mouseReleaseEvent (this=0x2170030, e=0x7fff771052c0) at ../../kdeui/widgets/kmenu.cpp:464
#17 0x00007f665e3f3144 in QWidget::event (this=0x2170030, event=0x7fff771052c0) at kernel/qwidget.cpp:8362
#18 0x00007f665e7f580b in QMenu::event (this=0x2170030, e=0x7fff771052c0) at widgets/qmenu.cpp:2469
#19 0x00007f665e3a2894 in notify_helper (e=0x7fff771052c0, receiver=0x2170030, this=0x1487000) at kernel/qapplication.cpp:4559
#20 QApplicationPrivate::notify_helper (this=0x1487000, receiver=0x2170030, e=0x7fff771052c0) at kernel/qapplication.cpp:4531
#21 0x00007f665e3a80bf in QApplication::notify (this=<optimized out>, receiver=0x2170030, e=0x7fff771052c0) at kernel/qapplication.cpp:4102
#22 0x00007f66601469e6 in KApplication::notify (this=0x7fff77105fa0, receiver=0x2170030, event=0x7fff771052c0) at ../../kdeui/kernel/kapplication.cpp:311
#23 0x00007f665d9a7e9c in QCoreApplication::notifyInternal (this=0x7fff77105fa0, receiver=0x2170030, event=0x7fff771052c0) at kernel/qcoreapplication.cpp:876
#24 0x00007f665e3a3862 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#25 QApplicationPrivate::sendMouseEvent (receiver=0x2170030, event=0x7fff771052c0, alienWidget=0x0, nativeWidget=0x2170030, buttonDown=0x0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3170
#26 0x00007f665e4232c1 in QETWidget::translateMouseEvent (this=0x2170030, event=<optimized out>) at kernel/qapplication_x11.cpp:4551
#27 0x00007f665e421bae in QApplication::x11ProcessEvent (this=0x7fff77105fa0, event=0x7fff77105b90) at kernel/qapplication_x11.cpp:3732
#28 0x00007f665e44b0d2 in x11EventSourceDispatch (s=0x147c8b0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#29 0x00007f6657c3fd53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f6657c400a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f6657c40164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f665d9d73bf in QEventDispatcherGlib::processEvents (this=0x12edad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#33 0x00007f665e44ad5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#34 0x00007f665d9a6c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#35 0x00007f665d9a6ed7 in QEventLoop::exec (this=0x7fff77105f30, flags=...) at kernel/qeventloop.cpp:204
#36 0x00007f665d9abf67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#37 0x0000000000408e4e in main (argc=1, argv=0x7fff77108428) at ../../src/main.cpp:303

Reported using DrKonqi