Bug 351415

Summary: Plasma crashed on adding a monitor
Product: [Plasma] plasmashell Reporter: Christian Bayer <christian_bay>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bshah, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.2.2   
Target Milestone: 1.0   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Christian Bayer 2015-08-17 22:17:30 UTC 
Application: plasmashell (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-25-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
Whenever I plug in my monitor via displayport, plasma gets very slow and finally crashes (together with a bunch of other KDE applications such as konsole, kwin and the kscreenlocker). I'm using the Noveau driver on a NVIDIA GK107GLM [Quadro K1000M].

The crash can be reproduced every time.

-- 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 0x7fd6aad4f7c0 (LWP 2508))]

Thread 49 (Thread 0x7fd696933700 (LWP 2509)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a8083b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fd6a808564f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fd698c7a099 in QXcbEventReader::run (this=0x13cd780) at qxcbconnection.cpp:1105
#4  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x13cd780) at thread/qthread_unix.cpp:337
#5  0x00007fd6a539d6aa in start_thread (arg=0x7fd696933700) at pthread_create.c:333
#6  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 48 (Thread 0x7fd68fc98700 (LWP 2522)):
#0  0x00007fd6a221ffb4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a222284a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd68fc97de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1499ea0) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd68fc98700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 47 (Thread 0x7fd680b77700 (LWP 2524)):
#0  0x00007fd6a5b1249d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a22662f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a222296c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd67c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd680b76de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x172f110) at thread/qthread_unix.cpp:337
#10 0x00007fd6a539d6aa in start_thread (arg=0x7fd680b77700) at pthread_create.c:333
#11 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 46 (Thread 0x7fd67ab97700 (LWP 2566)):
#0  QMutex::unlock (this=this@entry=0x18561b8) at thread/qmutex.cpp:264
#1  0x00007fd6a642e1ed in unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:138
#2  ~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:132
#3  canWaitLocked (this=0x1856190) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:244
#4  postEventSourcePrepare (s=0x7fd6740012d0, timeout=0x7fd67ab96c14) at kernel/qeventdispatcher_glib.cpp:254
#5  0x00007fd6a22223fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#9  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd67ab96de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#11 0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1842290) at thread/qthread_unix.cpp:337
#13 0x00007fd6a539d6aa in start_thread (arg=0x7fd67ab97700) at pthread_create.c:333
#14 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 45 (Thread 0x7fd679b96700 (LWP 2567)):
#0  0x00007fd6a2267789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222ea2 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd66c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd679b95de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x191f3a0) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd679b96700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 44 (Thread 0x7fd678ab5700 (LWP 2568)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd678ab4de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1a0e720) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd678ab5700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 43 (Thread 0x7fd66b7ff700 (LWP 2569)):
#0  0x00007fd6a221ff2f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a222239b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd66b7fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1b03570) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd66b7ff700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 42 (Thread 0x7fd66a7fe700 (LWP 2571)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd65c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd66a7fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1c23d40) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd66a7fe700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 41 (Thread 0x7fd6697ad700 (LWP 2572)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd6697acde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1d19050) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd6697ad700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 40 (Thread 0x7fd65bfff700 (LWP 2574)):
#0  timerSourceCheck (source=0x7fd654002e70) at kernel/qeventdispatcher_glib.cpp:164
#1  0x00007fd6a22228c1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd65bffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1ddc540) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd65bfff700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 39 (Thread 0x7fd65affe700 (LWP 2575)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222e76 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd64c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd65affdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1ede580) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd65affe700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 38 (Thread 0x7fd659ffd700 (LWP 2576)):
#0  0x00007fd6a5b1249d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a22662f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a222296c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd659ffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1fca180) at thread/qthread_unix.cpp:337
#10 0x00007fd6a539d6aa in start_thread (arg=0x7fd659ffd700) at pthread_create.c:333
#11 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 37 (Thread 0x7fd658ffc700 (LWP 2578)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222fd6 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd658ffbde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#5  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x20b00b0) at thread/qthread_unix.cpp:337
#7  0x00007fd6a539d6aa in start_thread (arg=0x7fd658ffc700) at pthread_create.c:333
#8  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 36 (Thread 0x7fd64b7ff700 (LWP 2579)):
#0  0x00007fd6a618fa20 in QMutex::lock (this=this@entry=0x21aada8) at thread/qmutex.cpp:218
#1  0x00007fd6a642e1db in QMutexLocker (m=0x21aada8, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#2  canWaitLocked (this=0x21aad80) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#3  postEventSourcePrepare (s=0x7fd6400012d0, timeout=0x7fd64b7fec14) at kernel/qeventdispatcher_glib.cpp:254
#4  0x00007fd6a22223fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#8  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd64b7fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#9  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#10 0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x21a8120) at thread/qthread_unix.cpp:337
#12 0x00007fd6a539d6aa in start_thread (arg=0x7fd64b7ff700) at pthread_create.c:333
#13 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 35 (Thread 0x7fd64a7fe700 (LWP 2580)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222a2a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd64a7fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x2293f90) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd64a7fe700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 34 (Thread 0x7fd6497fd700 (LWP 2581)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22223f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd63c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd6497fcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x2387040) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd6497fd700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 33 (Thread 0x7fd637fff700 (LWP 2582)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd637ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x2479170) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd637fff700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 32 (Thread 0x7fd636ffe700 (LWP 2583)):
#0  0x00007fd6a22223b3 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd636ffdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x1dd83a0) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd636ffe700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 31 (Thread 0x7fd635ffd700 (LWP 2584)):
#0  0x00007fd6a2267789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2221f38 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e76 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd62c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd635ffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x2696560) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd635ffd700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 30 (Thread 0x7fd634ffc700 (LWP 2589)):
#0  0x00007fd6a221fefe in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a222239b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd634ffbde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x27907c0) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd634ffc700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 29 (Thread 0x7fd6277ff700 (LWP 2593)):
#0  0x00007fd6a22228a8 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd61c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd6277fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x285dbd0) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd6277ff700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 28 (Thread 0x7fd6267fe700 (LWP 2595)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22223f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd6267fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x2951930) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd6267fe700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 27 (Thread 0x7fd6257fd700 (LWP 2596)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222d6d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd6180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd6257fcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x2a5b690) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd6257fd700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 26 (Thread 0x7fd613fff700 (LWP 2597)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fd6a9ea1644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fd6a9ea1689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fd6a539d6aa in start_thread (arg=0x7fd613fff700) at pthread_create.c:333
#4  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7fd5937fe700 (LWP 2599)):
#0  0x00007fd6a2222862 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd58c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd5937fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x2b46b90) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd5937fe700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7fd592301700 (LWP 2620)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd592300de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x305dd60) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd592301700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7fd590a4b700 (LWP 2622)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22226f9 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5880008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd590a4ad90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6aaa0ab56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x316fa30) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd590a4b700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7fd583216700 (LWP 2657)):
#0  0x00007fd6a2267789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222409 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd57c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd583215de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x3729d80) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd583216700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7fd57af50700 (LWP 2895)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd57af4fde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x3bb6020) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd57af50700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7fd579e4d700 (LWP 2896)):
#0  _dl_update_slotinfo (req_modid=1) at dl-tls.c:624
#1  0x00007fd6aad0a87c in update_get_addr (ti=0x7fd6a6631680) at dl-tls.c:801
#2  0x00007fd6a6196a12 in get_thread_data () at thread/qthread_unix.cpp:181
#3  QThreadData::current (createIfNecessary=createIfNecessary@entry=true) at thread/qthread_unix.cpp:212
#4  0x00007fd6a642e1ba in postEventSourcePrepare (s=0x7fd56c0012d0, timeout=0x7fd579e4cc14) at kernel/qeventdispatcher_glib.cpp:247
#5  0x00007fd6a22223fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd56c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#9  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd579e4cde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#11 0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x41185b0) at thread/qthread_unix.cpp:337
#13 0x00007fd6a539d6aa in start_thread (arg=0x7fd579e4d700) at pthread_create.c:333
#14 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7fd578d4a700 (LWP 2897)):
#0  0x00007fd6a221ffb0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a222284a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd578d49de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x42674e0) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd578d4a700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7fd56b7ff700 (LWP 2898)):
#0  0x00007fd6a2267789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222409 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd56b7fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x432ece0) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd56b7ff700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7fd56a7fe700 (LWP 2903)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22223f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd55c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd56a7fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x444fb40) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd56a7fe700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7fd5697fd700 (LWP 2905)):
#0  0x00007fd6a642e471 in timerSourceCheck (source=0x7fd560003070) at kernel/qeventdispatcher_glib.cpp:166
#1  0x00007fd6a22228c1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd5697fcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x4511e40) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd5697fd700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fd55bfff700 (LWP 2906)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22223f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd55bffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x45f6440) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd55bfff700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fd55affe700 (LWP 2907)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22223f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd54c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd55affdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x46f5e60) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd55affe700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fd559ffd700 (LWP 2908)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222eb1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd559ffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x47da020) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd559ffd700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fd558ffc700 (LWP 2911)):
#0  0x00007fd6a2267789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222fb8 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd558ffbde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#5  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x48d2cb0) at thread/qthread_unix.cpp:337
#7  0x00007fd6a539d6aa in start_thread (arg=0x7fd558ffc700) at pthread_create.c:333
#8  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fd54b7ff700 (LWP 2913)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd54b7fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x49e98f0) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd54b7ff700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fd54a7fe700 (LWP 2914)):
#0  0x00007fd6a221feee in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22227ef in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd54a7fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x4ab2220) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd54a7fe700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fd53e034700 (LWP 2928)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd53e033dc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd548319cf7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x4fdb310) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd53e034700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fd53cf10700 (LWP 2939)):
#0  0x00007fd6a22677a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222490 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd52c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd53cf0fde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x4c2f480) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd53cf10700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fd5337ff700 (LWP 2940)):
#0  0x00007fd6a618fe0f in testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x545b558: 0x0) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  testAndSetRelease<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x545b558: 0x0) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:175
#2  testAndSetRelease (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, this=this@entry=0x545b558) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:272
#3  fastTryUnlock (current=<synthetic pointer>, this=this@entry=0x545b558) at thread/qmutex.h:85
#4  QMutex::unlock (this=this@entry=0x545b558) at thread/qmutex.cpp:264
#5  0x00007fd6a642e1ed in unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:138
#6  ~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:132
#7  canWaitLocked (this=0x545b530) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:244
#8  postEventSourcePrepare (s=0x7fd5280012d0, timeout=0x7fd5337fec14) at kernel/qeventdispatcher_glib.cpp:254
#9  0x00007fd6a22223fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fd6a2222de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#13 0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd5337fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x545b380) at thread/qthread_unix.cpp:337
#17 0x00007fd6a539d6aa in start_thread (arg=0x7fd5337ff700) at pthread_create.c:333
#18 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fd51ffff700 (LWP 3067)):
#0  0x00007fd6a2267789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222fb8 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd51fffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#5  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x5a30f40) at thread/qthread_unix.cpp:337
#7  0x00007fd6a539d6aa in start_thread (arg=0x7fd51ffff700) at pthread_create.c:333
#8  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fd51effe700 (LWP 3068)):
#0  0x00007fd6a5b168dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5100008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd51effdd90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6aaa0ab56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x5b59840) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd51effe700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fd51d7fc700 (LWP 3073)):
#0  0x00007fd6a2222641 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a2222e37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd51d7fbde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x5ec1580) at thread/qthread_unix.cpp:337
#8  0x00007fd6a539d6aa in start_thread (arg=0x7fd51d7fc700) at pthread_create.c:333
#9  0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fd50ffff700 (LWP 3074)):
#0  0x00007fd6a22677a0 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd6a22228b9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd6a2222e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd5040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd50fffed90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6aaa0ab56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x5fd1eb0) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd50ffff700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fd50f7fe700 (LWP 5112)):
#0  __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:65
#1  0x00007fd6a5b168d2 in poll () at ../sysdeps/unix/syscall-template.S:81
#2  0x00007fd6a2222ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6a642ec6c in QEventDispatcherGlib::processEvents (this=0x7fd4fc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7fd50f7fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fd6a6192b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fd6a7f20f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd6a6197b0e in QThreadPrivate::start (arg=0x5029ab0) at thread/qthread_unix.cpp:337
#9  0x00007fd6a539d6aa in start_thread (arg=0x7fd50f7fe700) at pthread_create.c:333
#10 0x00007fd6a5b21eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fd6aad4f7c0 (LWP 2508)):
[KCrash Handler]
#6  QScreen::availableGeometry (this=0x0) at kernel/qscreen.cpp:284
#7  0x00007fd6a6749f8c in QScreen::availableVirtualGeometry (this=<optimized out>) at kernel/qscreen.cpp:366
#8  0x00007fd6aab90b9a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fd6a64069c9 in QMetaObject::activate (sender=sender@entry=0x15fb6e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd18f8f2d0) at kernel/qobject.cpp:3716
#10 0x00007fd6a6407057 in QMetaObject::activate (sender=sender@entry=0x15fb6e0, m=m@entry=0x7fd6a6b6eb80 <QWindow::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd18f8f2d0) at kernel/qobject.cpp:3582
#11 0x00007fd6a6726d4f in QWindow::screenChanged (this=this@entry=0x15fb6e0, _t1=_t1@entry=0x5d45ef0) at .moc/moc_qwindow.cpp:626
#12 0x00007fd6a67275a5 in QWindowPrivate::emitScreenChangedRecursion (this=this@entry=0x16062f0, newScreen=newScreen@entry=0x5d45ef0) at kernel/qwindow.cpp:366
#13 0x00007fd6a672acc3 in QWindowPrivate::setTopLevelScreen (this=0x16062f0, newScreen=0x5d45ef0, recreate=<optimized out>) at kernel/qwindow.cpp:387
#14 0x00007fd6a672ae65 in QWindow::screenDestroyed (this=0x15fb6e0, object=<optimized out>) at kernel/qwindow.cpp:1713
#15 0x00007fd6a640635a in call (a=0x7ffd18f8f520, r=0x15fb6e0, this=0x16065c0) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#16 QMetaObject::activate (sender=sender@entry=0x13dc140, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd18f8f520) at kernel/qobject.cpp:3702
#17 0x00007fd6a6407057 in QMetaObject::activate (sender=sender@entry=0x13dc140, m=m@entry=0x7fd6a6628940 <QObject::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd18f8f520) at kernel/qobject.cpp:3582
#18 0x00007fd6a64070ff in QObject::destroyed (this=this@entry=0x13dc140, _t1=_t1@entry=0x13dc140) at .moc/moc_qobject.cpp:206
#19 0x00007fd6a640fa8b in QObject::~QObject (this=0x13dc140, __in_chrg=<optimized out>) at kernel/qobject.cpp:903
#20 0x00007fd6a6749679 in QScreen::~QScreen (this=0x13dc140, __in_chrg=<optimized out>) at kernel/qscreen.cpp:77
#21 0x00007fd6a670ff2a in QPlatformScreen::~QPlatformScreen (this=0x13d0200, __in_chrg=<optimized out>) at kernel/qplatformscreen.cpp:57
#22 0x00007fd698c85769 in QXcbScreen::~QXcbScreen (this=0x13d0200, __in_chrg=<optimized out>) at qxcbscreen.cpp:222
#23 0x00007fd698c785ab in QXcbConnection::updateScreens (this=this@entry=0x13bdaf0) at qxcbconnection.cpp:286
#24 0x00007fd698c7927d in QXcbConnection::handleXcbEvent (this=this@entry=0x13bdaf0, event=event@entry=0x7fd690004060) at qxcbconnection.cpp:961
#25 0x00007fd698c7a4bb in QXcbConnection::processXcbEvents (this=0x13bdaf0) at qxcbconnection.cpp:1303
#26 0x00007fd6a640773a in QObject::event (this=0x13bdaf0, e=<optimized out>) at kernel/qobject.cpp:1245
#27 0x00007fd6a6cdfb2c in QApplicationPrivate::notify_helper (this=0x13b2420, receiver=0x13bdaf0, e=0x7fd69001d8b0) at kernel/qapplication.cpp:3720
#28 0x00007fd6a6ce5000 in QApplication::notify (this=0x7ffd18f90060, receiver=0x13bdaf0, e=0x7fd69001d8b0) at kernel/qapplication.cpp:3503
#29 0x00007fd6a63d5c2b in QCoreApplication::notifyInternal (this=0x7ffd18f90060, receiver=0x13bdaf0, event=event@entry=0x7fd69001d8b0) at kernel/qcoreapplication.cpp:935
#30 0x00007fd6a63d7c9b in sendEvent (event=0x7fd69001d8b0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#31 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x13a7f00) at kernel/qcoreapplication.cpp:1552
#32 0x00007fd6a63d8298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#33 0x00007fd6a642e843 in postEventSourceDispatch (s=0x13fb500) at kernel/qeventdispatcher_glib.cpp:271
#34 0x00007fd6a2222c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fd6a2222f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007fd6a2222fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007fd6a642ec57 in QEventDispatcherGlib::processEvents (this=0x13f0090, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#38 0x00007fd6a63d33e2 in QEventLoop::exec (this=this@entry=0x7ffd18f8fee0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#39 0x00007fd6a63db02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#40 0x000000000042fd9b in main ()

Possible duplicates by query: bug 350380, bug 348111.

Reported using DrKonqi
Comment 1 Christian Bayer 2015-08-17 22:18:21 UTC 
This one seems to be related: https://bugs.kde.org/show_bug.cgi?id=350195
Comment 2 David Edmundson 2015-08-17 22:19:03 UTC 

*** This bug has been marked as a duplicate of bug 345544 ***
Comment 3 David Edmundson 2015-08-17 22:19:32 UTC 
This has been fixed for a long while now, please upgrade.