Bug 371580

Summary: Plasma crash when using volume control applet
Product: [Plasma] plasma-pa Reporter: James Young <marmarama>
Component: appletAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bhush94, plasma-bugs
Priority: NOR Keywords: drkonqi
Version: 5.8.2   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description James Young 2016-10-24 15:15:49 UTC 
Application: plasmashell (5.8.2)

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.4.0-46-lowlatency x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
Using the Plasma volume control applet, I was trying to connect an application that was recording audio to a different Pulseaudio source, by dragging and dropping the application to the new source.  While I was in the middle of the drag-and-drop operation, the application stopped recording.  When I dropped the application icon on the new source, Plasma crashed and restarted with the accompanying backtrace.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6009fb28c0 (LWP 6010))]

Thread 18 (Thread 0x7f5f21ffb700 (LWP 6955)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x7f5efc003190) at thread/qthread_unix.cpp:344
#10 0x00007f60162a770a in start_thread (arg=0x7f5f21ffb700) at pthread_create.c:333
#11 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f5f227fc700 (LWP 6954)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007f60171c3c28 in QThreadPrivate::start (arg=0x7f5ef8002f90) at thread/qthread_unix.cpp:344
#16 0x00007f60162a770a in start_thread (arg=0x7f5f227fc700) at pthread_create.c:333
#17 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f5f22ffd700 (LWP 6953)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x7f5f00003190) at thread/qthread_unix.cpp:344
#10 0x00007f60162a770a in start_thread (arg=0x7f5f22ffd700) at pthread_create.c:333
#11 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f5f237fe700 (LWP 6952)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007f60171c3c28 in QThreadPrivate::start (arg=0x7f5f080025d0) at thread/qthread_unix.cpp:344
#16 0x00007f60162a770a in start_thread (arg=0x7f5f237fe700) at pthread_create.c:333
#17 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f5f23fff700 (LWP 6950)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x6f48250) at thread/qthread_unix.cpp:344
#10 0x00007f60162a770a in start_thread (arg=0x7f5f23fff700) at pthread_create.c:333
#11 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f5f28fbe700 (LWP 6949)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x7f5f24000af0) at thread/qthread_unix.cpp:344
#10 0x00007f60162a770a in start_thread (arg=0x7f5f28fbe700) at pthread_create.c:333
#11 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f5f297bf700 (LWP 6948)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x63c2210) at thread/qthread_unix.cpp:344
#10 0x00007f60162a770a in start_thread (arg=0x7f5f297bf700) at pthread_create.c:333
#11 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f5f3296b700 (LWP 6947)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f60171c4adb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7395b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x7019ad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5f5fde807f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f5f5fdec078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f5f5fdec0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f5f5fde726d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f5f5fde9bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f60171c3c28 in QThreadPrivate::start (arg=0x7582cb0) at thread/qthread_unix.cpp:344
#14 0x00007f60162a770a in start_thread (arg=0x7f5f3296b700) at pthread_create.c:333
#15 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f5f3316c700 (LWP 7006)):
#0  __GI___pthread_getspecific (key=3) at pthread_getspecific.c:30
#1  0x00007f60126ee070 in g_thread_self () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60126c631c in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60126c7255 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f60173ef30b in QEventDispatcherGlib::processEvents (this=0x7f5f2c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7f5f3316bd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#7  0x00007f60171bf044 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#8  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x5b426e0) at thread/qthread_unix.cpp:344
#9  0x00007f60162a770a in start_thread (arg=0x7f5f3316c700) at pthread_create.c:333
#10 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f5f39a79700 (LWP 6990)):
#0  0x00007f60173ee846 in timerSourcePrepare (source=0x7f5f34003070, timeout=0x7f5f39a78af4) at kernel/qeventdispatcher_glib.cpp:153
#1  0x00007f60126c692d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60126c72cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f60173ef30b in QEventDispatcherGlib::processEvents (this=0x7f5f340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7f5f39a78cc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#6  0x00007f60171bf044 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f5f3a136587 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x597d840) at thread/qthread_unix.cpp:344
#9  0x00007f60162a770a in start_thread (arg=0x7f5f39a79700) at pthread_create.c:333
#10 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f5f46a79700 (LWP 6703)):
#0  0x00007f60126c4405 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f60126c68cb in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60126c72cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f60173ef30b in QEventDispatcherGlib::processEvents (this=0x7f5f400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7f5f46a78d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#6  0x00007f60171bf044 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x3aded50) at thread/qthread_unix.cpp:344
#8  0x00007f60162a770a in start_thread (arg=0x7f5f46a79700) at pthread_create.c:333
#9  0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f5f67a2e700 (LWP 6583)):
#0  0x00007f6016ac4b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f60126c739c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60173ef30b in QEventDispatcherGlib::processEvents (this=0x7f5f600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7f5f67a2dc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#5  0x00007f60171bf044 in QThread::exec (this=this@entry=0x1c6dd10) at thread/qthread.cpp:507
#6  0x00007f601a3c2ac6 in QQuickPixmapReader::run (this=0x1c6dd10) at util/qquickpixmapcache.cpp:823
#7  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x1c6dd10) at thread/qthread_unix.cpp:344
#8  0x00007f60162a770a in start_thread (arg=0x7f5f67a2e700) at pthread_create.c:333
#9  0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f5ffc83e700 (LWP 6547)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f601bc035c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f601bc03609 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f60162a770a in start_thread (arg=0x7f5ffc83e700) at pthread_create.c:333
#4  0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5ffe573700 (LWP 6093)):
#0  0x00007f601270bac9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f60126c6939 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60126c72cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f60173ef30b in QEventDispatcherGlib::processEvents (this=0x7f5fec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7f5ffe572ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#6  0x00007f60171bf044 in QThread::exec (this=this@entry=0x172c500) at thread/qthread.cpp:507
#7  0x00007f6019a3e685 in QQmlThreadPrivate::run (this=0x172c500) at qml/ftw/qqmlthread.cpp:147
#8  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x172c500) at thread/qthread_unix.cpp:344
#9  0x00007f60162a770a in start_thread (arg=0x7f5ffe573700) at pthread_create.c:333
#10 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f5ffffff700 (LWP 6083)):
#0  timerSourcePrepareHelper (timeout=0x7f5fffffeb14, src=0x7f5ff4002c70) at kernel/qeventdispatcher_glib.cpp:132
#1  timerSourcePrepare (source=0x7f5ff4002c70, timeout=0x7f5fffffeb14) at kernel/qeventdispatcher_glib.cpp:165
#2  0x00007f60126c692d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60126c72cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f60173ef30b in QEventDispatcherGlib::processEvents (this=0x7f5ff40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7f5fffffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#7  0x00007f60171bf044 in QThread::exec (this=this@entry=0x1677b80) at thread/qthread.cpp:507
#8  0x00007f6019a3e685 in QQmlThreadPrivate::run (this=0x1677b80) at qml/ftw/qqmlthread.cpp:147
#9  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x1677b80) at thread/qthread_unix.cpp:344
#10 0x00007f60162a770a in start_thread (arg=0x7f5ffffff700) at pthread_create.c:333
#11 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f6006084700 (LWP 6051)):
#0  0x00007f60173ed54d in QTimerInfoList::timerWait (this=<optimized out>, tm=...) at kernel/qtimerinfo_unix.cpp:413
#1  0x00007f60173ee8be in timerSourcePrepareHelper (timeout=0x7f6006083b04, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#2  timerSourcePrepare (source=<optimized out>, timeout=0x7f6006083b04) at kernel/qeventdispatcher_glib.cpp:165
#3  0x00007f60126c692d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f60126c72cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f60173ef30b in QEventDispatcherGlib::processEvents (this=0x7f5ff80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7f6006083cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#8  0x00007f60171bf044 in QThread::exec (this=this@entry=0x7f601c337d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#9  0x00007f601c2c37a5 in QDBusConnectionManager::run (this=0x7f601c337d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:196
#10 0x00007f60171c3c28 in QThreadPrivate::start (arg=0x7f601c337d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:344
#11 0x00007f60162a770a in start_thread (arg=0x7f6006084700) at pthread_create.c:333
#12 0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f600787a700 (LWP 6032)):
#0  0x00007f6016ac4b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f601ab7bc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f601ab7d8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f6009bcda39 in QXcbEventReader::run (this=0x15ca1a0) at qxcbconnection.cpp:1337
#4  0x00007f60171c3c28 in QThreadPrivate::start (arg=0x15ca1a0) at thread/qthread_unix.cpp:344
#5  0x00007f60162a770a in start_thread (arg=0x7f600787a700) at pthread_create.c:333
#6  0x00007f6016ad082d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f6009fb28c0 (LWP 6010)):
[KCrash Handler]
#6  std::__atomic_base<int>::operator++ (this=0x1c500000001) at /usr/include/c++/5/bits/atomic_base.h:296
#7  QAtomicOps<int>::ref<int> (_q_value=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_cxx11.h:141
#8  QBasicAtomicInteger<int>::ref (this=0x1c500000001) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:110
#9  QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x50dcf00) at tools/qsharedpointer.cpp:1350
#10 0x00007f6009bdd44d in QWeakPointer<QObject>::QWeakPointer<QDrag> (ptr=0x50dcf00, this=0x7ffd4124bbc8) at ../../../../include/QtCore/../../src/corelib/tools/qsharedpointer_impl.h:723
#11 QPointer<QDrag>::QPointer (p=0x50dcf00, this=0x7ffd4124bbc8) at ../../../../include/QtCore/../../src/corelib/kernel/qpointer.h:71
#12 QXcbDrag::drop (this=0x15de2b0, globalPos=...) at qxcbdrag.cpp:528
#13 0x00007f60176e189a in QBasicDrag::eventFilter (this=0x15de2b0, o=0x524f570, e=0x7ffd4124c010) at kernel/qsimpledrag.cpp:165
#14 0x00007f601739b9ec in QCoreApplicationPrivate::sendThroughApplicationEventFilters (this=this@entry=0x15a9b10, receiver=receiver@entry=0x79ba370, event=event@entry=0x7ffd4124c010) at kernel/qcoreapplication.cpp:1081
#15 0x00007f6017c878d8 in QApplicationPrivate::notify_helper (this=0x15a9b10, receiver=0x79ba370, e=0x7ffd4124c010) at kernel/qapplication.cpp:3774
#16 0x00007f6017c8f296 in QApplication::notify (this=0x7ffd4124cdb0, receiver=0x79ba370, e=0x7ffd4124c010) at kernel/qapplication.cpp:3556
#17 0x00007f601739bda8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x79ba370, event=event@entry=0x7ffd4124c010) at kernel/qcoreapplication.cpp:988
#18 0x00007f60176ed0c0 in QCoreApplication::sendSpontaneousEvent (event=0x7ffd4124c010, receiver=0x79ba370) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#19 QGuiApplicationPrivate::processMouseEvent (e=0x2e5cea0) at kernel/qguiapplication.cpp:1909
#20 0x00007f60176eefc5 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x2e5cea0) at kernel/qguiapplication.cpp:1693
#21 0x00007f60176cce8b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:654
#22 0x00007f6009c03720 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:76
#23 0x00007f60126c71a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f60126c7400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f60173ef2ef in QEventDispatcherGlib::processEvents (this=0x15eced0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#27 0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x79cec30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#28 0x00007f60176e1ce2 in QBasicDrag::drag (this=0x15de2b0, o=<optimized out>) at kernel/qsimpledrag.cpp:193
#29 0x00007f60176fde49 in QDragManager::drag (this=0x78d4ab0, o=o@entry=0x50dcf00) at kernel/qdnd.cpp:141
#30 0x00007f60176fc787 in QDrag::exec (this=0x50dcf00, supportedActions=..., defaultDropAction=<optimized out>) at kernel/qdrag.cpp:284
#31 0x00007f5f68ca213b in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so
#32 0x00007f5f68ca245c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so
#33 0x00007f60173c6f36 in QtPrivate::QSlotObjectBase::call (a=0x7ffd4124c6d0, r=0x6045c60, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:130
#34 QMetaObject::activate (sender=sender@entry=0x6f861e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3723
#35 0x00007f60173c7577 in QMetaObject::activate (sender=sender@entry=0x6f861e0, m=m@entry=0x7f601a6a13c0 <QQuickItemGrabResult::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3602
#36 0x00007f601a5b74b0 in QQuickItemGrabResult::ready (this=this@entry=0x6f861e0) at .moc/moc_qquickitemgrabresult.cpp:184
#37 0x00007f601a540a55 in QQuickItemGrabResult::event (this=0x6f861e0, e=<optimized out>) at items/qquickitemgrabresult.cpp:214
#38 0x00007f6017c8789c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x6f861e0, e=0x79bba10) at kernel/qapplication.cpp:3799
#39 0x00007f6017c8f296 in QApplication::notify (this=0x7ffd4124cdb0, receiver=0x6f861e0, e=0x79bba10) at kernel/qapplication.cpp:3556
#40 0x00007f601739bda8 in QCoreApplication::notifyInternal2 (receiver=0x6f861e0, event=event@entry=0x79bba10) at kernel/qcoreapplication.cpp:988
#41 0x00007f601739e46b in QCoreApplication::sendEvent (event=0x79bba10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#42 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x159fba0) at kernel/qcoreapplication.cpp:1649
#43 0x00007f601739e8d8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#44 0x00007f60173eeee3 in postEventSourceDispatch (s=0x15f5190) at kernel/qeventdispatcher_glib.cpp:276
#45 0x00007f60126c71a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f60126c7400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f60126c74ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007f60173ef2ef in QEventDispatcherGlib::processEvents (this=0x15eced0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#49 0x00007f6017399d9a in QEventLoop::exec (this=this@entry=0x7ffd4124cc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210
#50 0x00007f60173a23ac in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#51 0x00007f60176e4dbc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1639
#52 0x00007f6017c877f5 in QApplication::exec () at kernel/qapplication.cpp:2975
#53 0x000000000041c988 in main (argc=2, argv=<optimized out>) at /workspace/build/shell/main.cpp:166

Reported using DrKonqi
Comment 1 Christoph Feck 2017-01-11 00:52:26 UTC 

*** This bug has been marked as a duplicate of bug 355491 ***