Application: amarok (2.5.0)
KDE Platform Version: 4.8.2 (4.8.2)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-24-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- Unusual behavior I noticed:

Amarok keeps crashing, if it works or not.

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 0x7f09b1df37c0 (LWP 5708))]

Thread 12 (Thread 0x7f098375f700 (LWP 5713)):
#0  0x00007f09ae6e3b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f09a92e8ff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f09a92e9124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f09af07a426 in QEventDispatcherGlib::processEvents (this=0x7f097c000900, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f09af049c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f09af049ed7 in QEventLoop::exec (this=0x7f098375ed90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f09aef48fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f09af0299ff in QInotifyFileSystemWatcherEngine::run (this=0x165bf10) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x165bf10) at thread/qthread_unix.cpp:298
#9  0x00007f09aae06e9a in start_thread (arg=0x7f098375f700) at pthread_create.c:308
#10 0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7f0982248700 (LWP 5714)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f09aef4c4db in wait (time=18446744073709551615, this=0x173abf0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x169a2e0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f09ac39a0eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x179b210, th=0x16d55a0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f09ac39c9db in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x16d55a0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x16d55a0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f09ac39b84f in ThreadWeaver::ThreadRunHelper::run (this=0x7f0982247de0, parent=0x179b210, th=0x16d55a0) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007f09ac39b8db in ThreadWeaver::Thread::run (this=0x16d55a0) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x16d55a0) at thread/qthread_unix.cpp:298
#9  0x00007f09aae06e9a in start_thread (arg=0x7f0982248700) at pthread_create.c:308
#10 0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7f0980cf0700 (LWP 5715)):
#0  0x00007f09aae0a05d in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7f0978000a60) at pthread_mutex_unlock.c:290
#2  0x00007f09a9324591 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f09a92e8713 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f09a92e8f1b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f09a92e9124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f09af07a426 in QEventDispatcherGlib::processEvents (this=0x7f09780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x00007f09af049c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f09af049ed7 in QEventLoop::exec (this=0x7f0980cefdc0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f09aef48fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x19020e0) at thread/qthread_unix.cpp:298
#11 0x00007f09aae06e9a in start_thread (arg=0x7f0980cf0700) at pthread_create.c:308
#12 0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7f09737ae700 (LWP 5716)):
#0  0x00007f09ae6e3b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f09a92e8ff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f09a92e9124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f09af07a426 in QEventDispatcherGlib::processEvents (this=0x7f096c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f09af049c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f09af049ed7 in QEventLoop::exec (this=0x7f09737addc0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f09aef48fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x193a360) at thread/qthread_unix.cpp:298
#8  0x00007f09aae06e9a in start_thread (arg=0x7f09737ae700) at pthread_create.c:308
#9  0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7f09723a1700 (LWP 5718)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f09aef4c4db in wait (time=18446744073709551615, this=0x173abf0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x169a2e0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f09ac39a0eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x179b210, th=0x1989df0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f09ac39c9db in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1989df0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f09ac39b84f in ThreadWeaver::ThreadRunHelper::run (this=0x7f09723a0de0, parent=0x179b210, th=0x1989df0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f09ac39b8db in ThreadWeaver::Thread::run (this=0x1989df0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x1989df0) at thread/qthread_unix.cpp:298
#8  0x00007f09aae06e9a in start_thread (arg=0x7f09723a1700) at pthread_create.c:308
#9  0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f0970be9700 (LWP 5719)):
#0  0x00007f09aae0a05d in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7f095c000a60) at pthread_mutex_unlock.c:290
#2  0x00007f09a9324591 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f09a92e8a2d in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f09a92e8f96 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f09a92e9124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f09af07a426 in QEventDispatcherGlib::processEvents (this=0x7f095c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x00007f09af049c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f09af049ed7 in QEventLoop::exec (this=0x7f0970be8d90, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f09aef48fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007f09af0299ff in QInotifyFileSystemWatcherEngine::run (this=0x1cf5ad0) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x1cf5ad0) at thread/qthread_unix.cpp:298
#12 0x00007f09aae06e9a in start_thread (arg=0x7f0970be9700) at pthread_create.c:308
#13 0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#14 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f0963df4700 (LWP 5720)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f09aef4c4db in wait (time=18446744073709551615, this=0x173abf0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x169a2e0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f09ac39a0eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x179b210, th=0x1db6a90) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f09ac39c9db in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1db6a90) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1db6a90) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f09ac39b84f in ThreadWeaver::ThreadRunHelper::run (this=0x7f0963df3de0, parent=0x179b210, th=0x1db6a90) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007f09ac39b8db in ThreadWeaver::Thread::run (this=0x1db6a90) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x1db6a90) at thread/qthread_unix.cpp:298
#9  0x00007f09aae06e9a in start_thread (arg=0x7f0963df4700) at pthread_create.c:308
#10 0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f09635f3700 (LWP 5721)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f09aef4c4db in wait (time=18446744073709551615, this=0x173abf0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x169a2e0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f09ac39a0eb in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x179b210, th=0x1d96020) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f09ac39c9db in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#8  0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#9  0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#10 0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#11 0x00007f09ac39c9f4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x166f480, th=0x1d96020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#12 0x00007f09ac39b84f in ThreadWeaver::ThreadRunHelper::run (this=0x7f09635f2de0, parent=0x179b210, th=0x1d96020) at ../../../threadweaver/Weaver/Thread.cpp:87
#13 0x00007f09ac39b8db in ThreadWeaver::Thread::run (this=0x1d96020) at ../../../threadweaver/Weaver/Thread.cpp:142
#14 0x00007f09aef4bfcb in QThreadPrivate::start (arg=0x1d96020) at thread/qthread_unix.cpp:298
#15 0x00007f09aae06e9a in start_thread (arg=0x7f09635f3700) at pthread_create.c:308
#16 0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#17 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f09627b1700 (LWP 5722)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f09a5f24dec in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f09a5f24f19 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f09aae06e9a in start_thread (arg=0x7f09627b1700) at pthread_create.c:308
#4  0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f096159a700 (LWP 5725)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f09ab3e0222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f09ab3e0259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f09aae06e9a in start_thread (arg=0x7f096159a700) at pthread_create.c:308
#4  0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f09465d6700 (LWP 8687)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f09a93247ef in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f09a0f95f7c in ?? () from /usr/lib/x86_64-linux-gnu/libgstreamer-0.10.so.0
#3  0x00007f09a930b208 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f09a930a9a5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f09aae06e9a in start_thread (arg=0x7f09465d6700) at pthread_create.c:308
#6  0x00007f09ae6ef4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f09b1df37c0 (LWP 5708)):
[KCrash Handler]
#6  data (this=0x8) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:2430
#8  d_func (this=0x0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:115
#9  QMetaObject::activate (sender=0x0, m=<optimized out>, local_signal_index=1, argv=0x7fff60960390) at kernel/qobject.cpp:3456
#10 0x00007f09b0b7aca5 in Collections::MediaDeviceCollection::collectionDisconnected (this=<optimized out>, _t1=...) at ./MediaDeviceCollection.moc:209
#11 0x00007f09b0b7af56 in Collections::MediaDeviceCollection::slotAttemptConnectionDone (this=0x0, success=<optimized out>) at ../../src/core-impl/collections/mediadevicecollection/MediaDeviceCollection.cpp:184
#12 0x00007f0989c363fd in Meta::MtpHandler::slotDeviceMatchFailed (this=0x33d6da0, job=0x2e323e0) at ../../../../../src/core-impl/collections/mtpcollection/handler/MtpHandler.cpp:1367
#13 0x00007f09af05f281 in QMetaObject::activate (sender=0x2e323e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff60960650) at kernel/qobject.cpp:3547
#14 0x00007f09ac39bd62 in ThreadWeaver::Job::failed (this=<optimized out>, _t1=0x2e323e0) at ./Job.moc:118
#15 0x00007f09af064446 in QObject::event (this=0x2e323e0, e=<optimized out>) at kernel/qobject.cpp:1195
#16 0x00007f09afa3f894 in notify_helper (e=0x7f0968002200, receiver=0x2e323e0, this=0xf9a8b0) at kernel/qapplication.cpp:4559
#17 QApplicationPrivate::notify_helper (this=0xf9a8b0, receiver=0x2e323e0, e=0x7f0968002200) at kernel/qapplication.cpp:4531
#18 0x00007f09afa44713 in QApplication::notify (this=0x7fff60960fd0, receiver=0x2e323e0, e=0x7f0968002200) at kernel/qapplication.cpp:4420
#19 0x00007f09b17e2b46 in KApplication::notify (this=0x7fff60960fd0, receiver=0x2e323e0, event=0x7f0968002200) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f09af04ae9c in QCoreApplication::notifyInternal (this=0x7fff60960fd0, receiver=0x2e323e0, event=0x7f0968002200) at kernel/qcoreapplication.cpp:876
#21 0x00007f09af04ec6a in sendEvent (event=0x7f0968002200, receiver=0x2e323e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xdf11f0) at kernel/qcoreapplication.cpp:1500
#23 0x00007f09af079f93 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#24 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#25 0x00007f09a92e8c9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f09a92e9060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f09a92e9124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f09af07a3bf in QEventDispatcherGlib::processEvents (this=0xdf2ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#29 0x00007f09afae7d5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f09af049c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f09af049ed7 in QEventLoop::exec (this=0x7fff60960f60, flags=...) at kernel/qeventloop.cpp:204
#32 0x00007f09af04ef67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#33 0x0000000000408e4e in main (argc=1, argv=0x7fff60963458) at ../../src/main.cpp:303

Possible duplicates by query: bug 281614, bug 279966.

Reported using DrKonqi