I wanted to play a song from my smart phone via mtp and I hit 'Pause' some times as amarok didn't react. Then it crashed.

Application: amarok (2.8.0)
KDE Platform Version: 4.14.11
Qt Version: 4.8.6
Operating System: Linux 4.2.3-200.fc22.x86_64 x86_64
Distribution (Platform): Fedora RPMs

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

I hit 'Pause' some times as amarok didn't react. It should play a song from my smart phone via mtp.

-- Backtrace:
Application: Amarok (amarok), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f589aa6b900 (LWP 5134))]

Thread 13 (Thread 0x7f5856bde700 (LWP 5138)):
#0  0x00007f58961cd8e9 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f5868c25124 in my_service_thread_sleep (abstime=0x7f5856bddc80, mutex=<optimized out>, that=<optimized out>) at /usr/src/debug/mariadb-10.0.21/include/mysql/psi/mysql_thread.h:1202
#2  0x00007f5868c25124 in my_service_thread_sleep (control=control@entry=0x7f5869849930 <checkpoint_control>, sleep_time=<optimized out>) at /usr/src/debug/mariadb-10.0.21/storage/maria/ma_servicethread.c:118
#3  0x00007f5868c73588 in ma_checkpoint_background (arg=0x1e) at /usr/src/debug/mariadb-10.0.21/storage/maria/ma_checkpoint.c:709
#4  0x00007f58961c8555 in start_thread (arg=0x7f5856bde700) at pthread_create.c:333
#5  0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f58563dd700 (LWP 5139)):
#0  0x00007f58961cd8e9 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f5897d18ff4 in QWaitCondition::wait(QMutex*, unsigned long) (time=60000, this=0x1bddd60) at thread/qwaitcondition_unix.cpp:84
#2  0x00007f5897d18ff4 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1beb560, mutex=mutex@entry=0x1beb558, time=time@entry=60000) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f589a3afbff in AbstractDirectoryWatcher::run() (this=0x1beb530) at ../../src/scanner/AbstractDirectoryWatcher.cpp:65
#4  0x00007f5895207712 in ThreadWeaver::JobRunHelper::runTheJob(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=this@entry=0x7f58563dcc90, th=th@entry=0x1c029d0, job=job@entry=0x1beb530) at ../../../threadweaver/Weaver/Job.cpp:106
#5  0x00007f589520791e in ThreadWeaver::Job::execute(ThreadWeaver::Thread*) (this=0x1beb530, th=0x1c029d0) at ../../../threadweaver/Weaver/Job.cpp:135
#6  0x00007f5895206feb in ThreadWeaver::Thread::run() (this=0x1c029d0) at ../../../threadweaver/Weaver/Thread.cpp:108
#7  0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x1c029d0) at thread/qthread_unix.cpp:349
#8  0x00007f58961c8555 in start_thread (arg=0x7f58563dd700) at pthread_create.c:333
#9  0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f5855bdc700 (LWP 5140)):
#0  0x00007f589764efad in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5891299b00 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f5855bdba70, __fd=<optimized out>) at /usr/include/bits/unistd.h:44
#2  0x00007f5891299b00 in g_wakeup_acknowledge (wakeup=0x7f5848001f80) at gwakeup.c:210
#3  0x00007f58912558b4 in g_main_context_check (context=context@entry=0x7f584c0009a0, max_priority=2147483647, fds=fds@entry=0x7f584c002860, n_fds=n_fds@entry=1) at gmain.c:3600
#4  0x00007f5891255d60 in g_main_context_iterate (context=context@entry=0x7f584c0009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3805
#5  0x00007f5891255ecc in g_main_context_iteration (context=0x7f584c0009a0, may_block=1) at gmain.c:3869
#6  0x00007f5897e584ee in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f584c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#7  0x00007f5897e26791 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5855bdbc80, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f5897e26b05 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5855bdbc80, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f5897d16289 in QThread::exec() (this=this@entry=0x1c2eab0) at thread/qthread.cpp:538
#10 0x00007f5897e06863 in QInotifyFileSystemWatcherEngine::run() (this=0x1c2eab0) at io/qfilesystemwatcher_inotify.cpp:265
#11 0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x1c2eab0) at thread/qthread_unix.cpp:349
#12 0x00007f58961c8555 in start_thread (arg=0x7f5855bdc700) at pthread_create.c:333
#13 0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f58553db700 (LWP 5141)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1bc7770) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1bc7678, mutex=0x1ba5140, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f58952056ec in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned(ThreadWeaver::Thread*) (this=0x1bc7650, th=0x1ccf9c0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f58952083f3 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x1ccf9c0, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x1ccf9c0, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x1ccf9c0, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#7  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x1ccf9c0, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#8  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x1ccf9c0, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#9  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x1ccf9c0, previous=0x21b8990) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#10 0x00007f5895206f4f in ThreadWeaver::Thread::run() (this=0x1ccf9c0) at ../../../threadweaver/Weaver/Thread.cpp:98
#11 0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x1ccf9c0) at thread/qthread_unix.cpp:349
#12 0x00007f58961c8555 in start_thread (arg=0x7f58553db700) at pthread_create.c:333
#13 0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f5847fff700 (LWP 5142)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1bc7770) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1bc7678, mutex=0x1ba5140, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f58952056ec in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned(ThreadWeaver::Thread*) (this=0x1bc7650, th=0x7f5840018950) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f58952083f3 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f5840018950, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f5840018950, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f5840018950, previous=0x34bd780) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#7  0x00007f5895206f4f in ThreadWeaver::Thread::run() (this=0x7f5840018950) at ../../../threadweaver/Weaver/Thread.cpp:98
#8  0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x7f5840018950) at thread/qthread_unix.cpp:349
#9  0x00007f58961c8555 in start_thread (arg=0x7f5847fff700) at pthread_create.c:333
#10 0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f58477fe700 (LWP 5143)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1bc7770) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1bc7678, mutex=0x1ba5140, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f58952056ec in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned(ThreadWeaver::Thread*) (this=0x1bc7650, th=0x7f58400221b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f58952083f3 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f58400221b0, previous=0x7943590) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f5895206f4f in ThreadWeaver::Thread::run() (this=0x7f58400221b0) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x7f58400221b0) at thread/qthread_unix.cpp:349
#7  0x00007f58961c8555 in start_thread (arg=0x7f58477fe700) at pthread_create.c:333
#8  0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f5846ffd700 (LWP 5144)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1bc7770) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1bc7678, mutex=0x1ba5140, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f58952056ec in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned(ThreadWeaver::Thread*) (this=0x1bc7650, th=0x7f584002c0d0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f58952083f3 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584002c0d0, previous=0x7793580) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f5895206f4f in ThreadWeaver::Thread::run() (this=0x7f584002c0d0) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x7f584002c0d0) at thread/qthread_unix.cpp:349
#7  0x00007f58961c8555 in start_thread (arg=0x7f5846ffd700) at pthread_create.c:333
#8  0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f58467fc700 (LWP 5145)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1bc7770) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1bc7678, mutex=0x1ba5140, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f58952056ec in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned(ThreadWeaver::Thread*) (this=0x1bc7650, th=0x7f5840038f20) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f58952083f3 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f5840038f20, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f5840038f20, previous=0x767e250) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f5895206f4f in ThreadWeaver::Thread::run() (this=0x7f5840038f20) at ../../../threadweaver/Weaver/Thread.cpp:98
#7  0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x7f5840038f20) at thread/qthread_unix.cpp:349
#8  0x00007f58961c8555 in start_thread (arg=0x7f58467fc700) at pthread_create.c:333
#9  0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5845ffb700 (LWP 5146)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1bc7770) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1bc7678, mutex=0x1ba5140, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f58952056ec in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned(ThreadWeaver::Thread*) (this=0x1bc7650, th=0x7f584003cb90) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f58952083f3 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584003cb90, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584003cb90, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584003cb90, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#7  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584003cb90, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#8  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584003cb90, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#9  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584003cb90, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#10 0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584003cb90, previous=0x76342d0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#11 0x00007f5895206f4f in ThreadWeaver::Thread::run() (this=0x7f584003cb90) at ../../../threadweaver/Weaver/Thread.cpp:98
#12 0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x7f584003cb90) at thread/qthread_unix.cpp:349
#13 0x00007f58961c8555 in start_thread (arg=0x7f5845ffb700) at pthread_create.c:333
#14 0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f58457fa700 (LWP 5147)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x1bc7770) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f5897d19016 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x1bc7678, mutex=0x1ba5140, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f58952056ec in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned(ThreadWeaver::Thread*) (this=0x1bc7650, th=0x7f584004d730) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f58952083f3 in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#7  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#8  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#9  0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#10 0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#11 0x00007f589520840c in ThreadWeaver::WorkingHardState::applyForWork(ThreadWeaver::Thread*, ThreadWeaver::Job*) (this=0x1acaa20, th=0x7f584004d730, previous=0x76342d0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#12 0x00007f5895206f4f in ThreadWeaver::Thread::run() (this=0x7f584004d730) at ../../../threadweaver/Weaver/Thread.cpp:98
#13 0x00007f5897d18aac in QThreadPrivate::start(void*) (arg=0x7f584004d730) at thread/qthread_unix.cpp:349
#14 0x00007f58961c8555 in start_thread (arg=0x7f58457fa700) at pthread_create.c:333
#15 0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f582f7fe700 (LWP 5150)):
#0  0x00007f58961cd540 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f58967bbb5a in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7f5896abef00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f58967bbb89 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f58961c8555 in start_thread (arg=0x7f582f7fe700) at pthread_create.c:333
#4  0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f578a785700 (LWP 16003)):
#0  0x00007f58976532fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f586a5d058c in linux_udev_event_thread_main () at /lib64/libusb-1.0.so.0
#2  0x00007f58961c8555 in start_thread (arg=0x7f578a785700) at pthread_create.c:333
#3  0x00007f589765eb9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f589aa6b900 (LWP 5134)):
[KCrash Handler]
#6  0x00007f585434738d in CurrentTrack::mousePressEvent(QGraphicsSceneMouseEvent*) (this=0x2198110, event=0x7ffcf5795ba0) at ../../../../../src/context/applets/currenttrack/CurrentTrack.cpp:258
#7  0x00007f5898e3cc47 in QGraphicsItem::sceneEvent(QEvent*) (this=0x2198120, event=0x7ffcf5795ba0) at graphicsview/qgraphicsitem.cpp:6752
#8  0x00007f5898e6562f in QGraphicsScenePrivate::sendMouseEvent(QGraphicsSceneMouseEvent*) (this=0x20f41d0, mouseEvent=0x7ffcf5795ba0) at graphicsview/qgraphicsscene.cpp:1295
#9  0x00007f5898e706f6 in QGraphicsScenePrivate::mousePressEventHandler(QGraphicsSceneMouseEvent*) (this=this@entry=0x20f41d0, mouseEvent=mouseEvent@entry=0x7ffcf5795ba0) at graphicsview/qgraphicsscene.cpp:1422
#10 0x00007f5898e70bc9 in QGraphicsScene::mousePressEvent(QGraphicsSceneMouseEvent*) (this=<optimized out>, mouseEvent=0x7ffcf5795ba0) at graphicsview/qgraphicsscene.cpp:4074
#11 0x00007f5898e7aadf in QGraphicsScene::event(QEvent*) (this=0x20f41b0, event=0x7ffcf5795ba0) at graphicsview/qgraphicsscene.cpp:3455
#12 0x00007f589884c3ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=0x16d42d0, receiver=0x20f41b0, e=0x7ffcf5795ba0) at kernel/qapplication.cpp:4565
#13 0x00007f5898853206 in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x7ffcf5796a10, receiver=receiver@entry=0x20f41b0, e=e@entry=0x7ffcf5795ba0) at kernel/qapplication.cpp:4351
#14 0x00007f58995c854a in KApplication::notify(QObject*, QEvent*) (this=0x7ffcf5796a10, receiver=0x20f41b0, event=0x7ffcf5795ba0) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007f5897e27f1d in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffcf5796a10, receiver=0x20f41b0, event=event@entry=0x7ffcf5795ba0) at kernel/qcoreapplication.cpp:953
#16 0x00007f589884ad56 in qt_sendSpontaneousEvent(QObject*, QEvent*) (event=event@entry=0x7ffcf5795ba0, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:234
#17 0x00007f589884ad56 in qt_sendSpontaneousEvent(QObject*, QEvent*) (receiver=<optimized out>, event=event@entry=0x7ffcf5795ba0) at kernel/qapplication.cpp:5563
#18 0x00007f5898e9278f in QGraphicsView::mousePressEvent(QMouseEvent*) (this=0x20f47b0, event=0x7ffcf57961b0) at graphicsview/qgraphicsview.cpp:3164
#19 0x00007f58988a0f00 in QWidget::event(QEvent*) (this=this@entry=0x20f47b0, event=event@entry=0x7ffcf57961b0) at kernel/qwidget.cpp:8385
#20 0x00007f5898c656fe in QFrame::event(QEvent*) (this=0x20f47b0, e=0x7ffcf57961b0) at widgets/qframe.cpp:557
#21 0x00007f5898e935df in QGraphicsView::viewportEvent(QEvent*) (this=0x20f47b0, event=0x7ffcf57961b0) at graphicsview/qgraphicsview.cpp:2866
#22 0x00007f5897e28086 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) (this=this@entry=0x16d42d0, receiver=receiver@entry=0x21186a0, event=event@entry=0x7ffcf57961b0) at kernel/qcoreapplication.cpp:1063
#23 0x00007f589884c38c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=0x16d42d0, receiver=0x21186a0, e=0x7ffcf57961b0) at kernel/qapplication.cpp:4561
#24 0x00007f58988533c6 in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x7ffcf5796a10, receiver=receiver@entry=0x21186a0, e=e@entry=0x7ffcf57961b0) at kernel/qapplication.cpp:4108
#25 0x00007f58995c854a in KApplication::notify(QObject*, QEvent*) (this=0x7ffcf5796a10, receiver=0x21186a0, event=0x7ffcf57961b0) at ../../kdeui/kernel/kapplication.cpp:311
#26 0x00007f5897e27f1d in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffcf5796a10, receiver=0x21186a0, event=0x7ffcf57961b0) at kernel/qcoreapplication.cpp:953
#27 0x00007f58988529cd in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) (receiver=0x21186a0, event=0x7ffcf57961b0, alienWidget=0x0, nativeWidget=0x21186a0, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true) at ../../src/corelib/kernel/qcoreapplication.h:231
#28 0x00007f58988caa1b in QETWidget::translateMouseEvent(_XEvent const*) (this=0x21186a0, event=<optimized out>) at kernel/qapplication_x11.cpp:4540
#29 0x00007f58988c93bd in QApplication::x11ProcessEvent(_XEvent*) (this=0x7ffcf5796a10, event=event@entry=0x7ffcf5796510) at kernel/qapplication_x11.cpp:3663
#30 0x00007f58988f2489 in x11EventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x16d04b0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#31 0x00007f5891255a8a in g_main_context_dispatch (context=0x16cf5d0) at gmain.c:3122
#32 0x00007f5891255a8a in g_main_context_dispatch (context=context@entry=0x16cf5d0) at gmain.c:3737
#33 0x00007f5891255e20 in g_main_context_iterate (context=context@entry=0x16cf5d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3808
#34 0x00007f5891255ecc in g_main_context_iteration (context=0x16cf5d0, may_block=1) at gmain.c:3869
#35 0x00007f5897e584ce in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x15e4cf0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#36 0x00007f58988f2626 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#37 0x00007f5897e26791 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffcf57968f0, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007f5897e26b05 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffcf57968f0, flags=...) at kernel/qeventloop.cpp:204
#39 0x00007f5897e2c6a9 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1225
#40 0x00007f589884ab3c in QApplication::exec() () at kernel/qapplication.cpp:3823
#41 0x000000000040869d in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ../../src/main.cpp:329

The reporter indicates this bug may be a duplicate of or related to bug 325685, bug 333541.

Possible duplicates by query: bug 333541, bug 333279, bug 331042.

Reproducible: Sometimes

Steps to Reproduce:
1. connect a smart phone via mtp
2. play a song via amarok
3. when an error occurs, amarok will crash (maybe it has to be a specific error, I don't know, maybe when a android locks its screen and mtp will stop this might be an error to crash amarok, I'm not sure)

Actual Results:  
amarok freezes a short time and then it crashes

Expected Results:  
amarok should bring a error message and don't play the track

Myriam Schweingruber said in #333541 I should open a new issue ;)