Bug 354118

Summary: Plasma Crash when heavy working
Product: [Plasma] plasmashell Reporter: Thanusha Rameshwara Bandara <thnzrmzwr>
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 Thanusha Rameshwara Bandara 2015-10-20 07:34:41 UTC 
Application: plasmashell (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-30-generic x86_64
Distribution: Ubuntu 15.04

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

plasma crash when i working heavily and sometimes crash when click taskbar and system tray icons but not at all

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 0x7f6d3fcff7c0 (LWP 4813))]

Thread 36 (Thread 0x7f6d2cb69700 (LWP 4815)):
#0  0x00007f6d3aaae8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6d3d01bb72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f6d3d01d64f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f6d2f6f8099 in QXcbEventReader::run (this=0xef65d0) at qxcbconnection.cpp:1105
#4  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0xef65d0) at thread/qthread_unix.cpp:337
#5  0x00007f6d3a3356aa in start_thread (arg=0x7f6d2cb69700) at pthread_create.c:333
#6  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 35 (Thread 0x7f6d26831700 (LWP 4819)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371baddb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6d200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6d26830de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0xfd1af0) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6d26831700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 34 (Thread 0x7f6d18bd5700 (LWP 4820)):
#0  0x00007f6d371ba2ba in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6d140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6d18bd4de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x1842940) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6d18bd5700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 33 (Thread 0x7f6d12396700 (LWP 4824)):
#0  0x00007ffc005cbd18 in clock_gettime ()
#1  0x00007f6d3aac838d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f6d3b1e5cb6 in qt_clock_gettime (ts=0x7f6d12395b40, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:161
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:170
#5  0x00007f6d3b3c4639 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f6d04002ed0) at kernel/qtimerinfo_unix.cpp:84
#6  0x00007f6d3b3c4ba5 in QTimerInfoList::timerWait (this=0x7f6d04002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x00007f6d3b3c603e in timerSourcePrepareHelper (timeout=0x7f6d12395c14, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f6d12395c14) at kernel/qeventdispatcher_glib.cpp:160
#9  0x00007f6d371ba3fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6d040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#13 0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6d12395de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x15e5c90) at thread/qthread_unix.cpp:337
#17 0x00007f6d3a3356aa in start_thread (arg=0x7f6d12396700) at pthread_create.c:333
#18 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 32 (Thread 0x7f6d11385700 (LWP 4825)):
#0  0x00007f6d3aaae8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6d371baebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6d080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6d11384de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x14a05f0) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6d11385700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 31 (Thread 0x7f6d039c6700 (LWP 4826)):
#0  0x00007f6d3b3c626d in idleTimerSourceCheck (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:219
#1  0x00007f6d371ba8c1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bae60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6cfc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6d039c5de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x16aefa0) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6d039c6700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 30 (Thread 0x7f6d02935700 (LWP 4827)):
#0  0x00007f6d371b7f2f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba39b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6cf40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6d02934de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x18e4960) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6d02935700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 29 (Thread 0x7f6d01834700 (LWP 4828)):
#0  update_get_addr (ti=0x7f6d3b5c9680) at dl-tls.c:804
#1  0x00007f6d3b12ea12 in get_thread_data () at thread/qthread_unix.cpp:181
#2  QThreadData::current (createIfNecessary=createIfNecessary@entry=true) at thread/qthread_unix.cpp:212
#3  0x00007f6d3b3c61ba in postEventSourcePrepare (s=0x7f6cf80012d0, timeout=0x7f6d01833c14) at kernel/qeventdispatcher_glib.cpp:247
#4  0x00007f6d371ba3fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6cf80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#8  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6d01833de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#9  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#10 0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x19d77f0) at thread/qthread_unix.cpp:337
#12 0x00007f6d3a3356aa in start_thread (arg=0x7f6d01834700) at pthread_create.c:333
#13 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 28 (Thread 0x7f6cf3fff700 (LWP 4829)):
#0  0x00007f6d371b7ef1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba39b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6cec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6cf3ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x1af3f30) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6cf3fff700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 27 (Thread 0x7f6cf2ffe700 (LWP 4830)):
#0  0x00007f6d3aaae8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6d371baebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6ce40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6cf2ffdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x1bef760) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6cf2ffe700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 26 (Thread 0x7f6cf1ffd700 (LWP 4831)):
#0  0x00007f6d3aaae8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6d371baebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6ce80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6cf1ffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x1ccd120) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6cf1ffd700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7f6cf0ffc700 (LWP 4832)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3ee39644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f6d3ee39689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f6d3a3356aa in start_thread (arg=0x7f6cf0ffc700) at pthread_create.c:333
#4  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7f6c63fff700 (LWP 4833)):
#0  0x00007f6d371ff789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371baa16 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371baf20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c5c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c63ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x1db1fb0) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c63fff700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7f6c6234d700 (LWP 4834)):
#0  0x00007f6d3aaae8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6d371baebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c6234cde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x21b4170) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6c6234d700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7f6c53fff700 (LWP 4838)):
#0  0x00007f6d3aaae8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6d371baebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c4c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c53ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x232b670) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6c53fff700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7f6c609c1700 (LWP 4839)):
#0  0x00007f6d371ba972 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371bae60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c58014520, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c609c0d90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3f9a2b56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x27f79b0) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6c609c1700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7f6c51153700 (LWP 4841)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba3f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c4404d370, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c51152de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x2868680) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c51153700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7f6c4b7ff700 (LWP 4842)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371b9e5e in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bad75 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c4b7fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x293ea80) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c4b7ff700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f6c4a7fe700 (LWP 4843)):
#0  0x00007f6d371ff789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371b9df0 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bad75 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c4a7fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x2a544d0) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c4a7fe700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f6c497fd700 (LWP 4844)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba8b9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bae60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c497fcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x2b2e1d0) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c497fd700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f6c37fff700 (LWP 4845)):
#0  0x00007f6d371ff24e in g_private_get () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371e1e00 in g_thread_self () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371b9ddc in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bad75 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c37ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x2c40940) at thread/qthread_unix.cpp:337
#10 0x00007f6d3a3356aa in start_thread (arg=0x7f6c37fff700) at pthread_create.c:333
#11 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f6c36ffe700 (LWP 4846)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba6f9 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bae37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c36ffdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x2d06af0) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c36ffe700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f6c35ffd700 (LWP 4847)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba3f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c2c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c35ffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x2e2d120) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c35ffd700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f6c34ffc700 (LWP 4849)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x2836940) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x282ce30, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x282cdb0) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6c34ffc700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f6c26fff700 (LWP 4850)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x1811f50) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x14faf40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x14faec0) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6c26fff700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f6c194f9700 (LWP 4853)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba3f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c194f8dc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6c1b790cf7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x3a1b560) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c194f9700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f6c13fff700 (LWP 4858)):
#0  0x00007f6d371ff7a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371ba8b9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bae60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c0c04d370, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c13ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x3719550) at thread/qthread_unix.cpp:337
#9  0x00007f6d3a3356aa in start_thread (arg=0x7f6c13fff700) at pthread_create.c:333
#10 0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f6c12ffe700 (LWP 4859)):
#0  0x00007f6d371ff7a2 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6d371bad6d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c12ffdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x3a150a0) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6c12ffe700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f6c10956700 (LWP 4861)):
#0  0x00007f6d3aaae8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6d371baebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d3b3c6c6c in QEventDispatcherGlib::processEvents (this=0x7f6c000008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7f6c10955de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f6d3b12ab44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f6d3ceb8f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x429a490) at thread/qthread_unix.cpp:337
#8  0x00007f6d3a3356aa in start_thread (arg=0x7f6c10956700) at pthread_create.c:333
#9  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f6bfffff700 (LWP 4862)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x43cbbc0) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x43ce1f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x43ce170) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6bfffff700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f6bfe7fe700 (LWP 4863)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x3dcc1e0) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x3d176b0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x3d17630) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6bfe7fe700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f6bfc889700 (LWP 5693)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x47e6190) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5795bb0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x5795b30) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6bfc889700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f6bf6dc9700 (LWP 6012)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x63b73f0) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x641e150, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x641e0d0) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6bf6dc9700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f6bf5348700 (LWP 6014)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x694a170) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x64554f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x6455470) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6bf5348700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f6beefff700 (LWP 6597)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6d3b130c6b in wait (time=18446744073709551615, this=0x3a94560) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x70c62f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007f6d3fa14fab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f6d3fa153a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f6d3b12fb0e in QThreadPrivate::start (arg=0x70c6270) at thread/qthread_unix.cpp:337
#6  0x00007f6d3a3356aa in start_thread (arg=0x7f6beefff700) at pthread_create.c:333
#7  0x00007f6d3aab9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f6d3fcff7c0 (LWP 4813)):
[KCrash Handler]
#6  KXErrorHandler::handle (this=0x90, dpy=0xeea990, e=0x7ffc005154f0) at ../../src/kxerrorhandler.cpp:109
#7  0x00007f6d3f67507e in KXErrorHandler::handler_wrapper (dpy=<optimized out>, e=<optimized out>) at ../../src/kxerrorhandler.cpp:102
#8  0x00007f6d3d26f7ed in _XError (dpy=dpy@entry=0xeea990, rep=rep@entry=0x7f6d28008e70) at ../../src/XlibInt.c:1463
#9  0x00007f6d3d26c7e7 in handle_error (dpy=dpy@entry=0xeea990, err=0x7f6d28008e70, in_XReply=in_XReply@entry=1) at ../../src/xcb_io.c:213
#10 0x00007f6d3d26d8b1 in _XReply (dpy=dpy@entry=0xeea990, rep=rep@entry=0x7ffc00515690, extra=extra@entry=0, discard=discard@entry=0) at ../../src/xcb_io.c:699
#11 0x00007f6d3d2544c6 in XGetWindowProperty (dpy=0xeea990, w=132120581, property=property@entry=67, offset=offset@entry=0, length=length@entry=8192, delete=delete@entry=0, req_type=31, actual_type=0x7ffc00515750, actual_format=0x7ffc0051574c, nitems=0x7ffc00515758, bytesafter=0x7ffc00515760, prop=0x7ffc00515768) at ../../src/GetProp.c:69
#12 0x00007f6d3d25372d in XGetClassHint (dpy=<optimized out>, w=<optimized out>, classhint=0x7ffc005157a0) at ../../src/GetHints.c:311
#13 0x00007f6c521dcc93 in TaskManager::Task::classClass (this=this@entry=0x68437d0) at ../../libtaskmanager/task_x11.cpp:76
#14 0x00007f6c521cdaca in TaskManager::TaskItem::launcherUrlFromTask (groupManager=0x25638d0, task=0x68437d0, startup=startup@entry=0x0) at ../../libtaskmanager/taskitem.cpp:584
#15 0x00007f6c521a98f7 in TaskManager::GroupManagerPrivate::addTask (this=this@entry=0x2564220, task=0x68437d0) at ../../libtaskmanager/groupmanager.cpp:373
#16 0x00007f6c521ac8d2 in TaskManager::GroupManagerPrivate::taskChanged (this=0x2564220, task=0x68437d0, changes=...) at ../../libtaskmanager/groupmanager.cpp:658
#17 0x00007f6c521ada76 in TaskManager::GroupManager::qt_static_metacall (_o=0x25638d0, _c=15640976, _id=5330160, _a=0x7ffc00515c20) at ./moc_groupmanager.cpp:277
#18 0x00007f6d3b39e9c9 in QMetaObject::activate (sender=sender@entry=0x7f6c523fbf90 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7ffc00515c20) at kernel/qobject.cpp:3716
#19 0x00007f6d3b39f057 in QMetaObject::activate (sender=sender@entry=0x7f6c523fbf90 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, m=m@entry=0x7f6c523f8800 <TaskManager::TaskManager::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7ffc00515c20) at kernel/qobject.cpp:3582
#20 0x00007f6c521d0d7a in TaskManager::TaskManager::windowChanged (this=this@entry=0x7f6c523fbf90 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, _t1=0x68437d0, _t2=...) at ./moc_taskmanager.cpp:346
#21 0x00007f6c521d1396 in TaskManager::TaskManager::taskChanged (this=0x7f6c523fbf90 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, changes=...) at ../../libtaskmanager/taskmanager.cpp:385
#22 0x00007f6c521d3a3c in TaskManager::TaskManager::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_taskmanager.cpp:181
#23 0x00007f6d3b39e9c9 in QMetaObject::activate (sender=sender@entry=0x68437d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc00515e30) at kernel/qobject.cpp:3716
#24 0x00007f6d3b39f057 in QMetaObject::activate (sender=sender@entry=0x68437d0, m=m@entry=0x7f6c523fa6e0 <TaskManager::Task::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc00515e30) at kernel/qobject.cpp:3582
#25 0x00007f6c521de218 in TaskManager::Task::changed (this=this@entry=0x68437d0, _t1=...) at moc_task.cpp:354
#26 0x00007f6c521c04a2 in TaskManager::Task::refresh (this=this@entry=0x68437d0, dirty=...) at ../../libtaskmanager/task.cpp:161
#27 0x00007f6c521d34ca in TaskManager::TaskManager::windowChanged (this=<optimized out>, w=132120581, dirty=0x7ffc00516180) at ../../libtaskmanager/taskmanager.cpp:372
#28 0x00007f6c521d39c8 in TaskManager::TaskManager::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_taskmanager.cpp:174
#29 0x00007f6d3b39e9c9 in QMetaObject::activate (sender=0x7f6d3f8a19f0 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=10, argv=argv@entry=0x7ffc00516110) at kernel/qobject.cpp:3716
#30 0x00007f6d3b39f057 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f6d3f8a0b40 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=10, argv=argv@entry=0x7ffc00516110) at kernel/qobject.cpp:3582
#31 0x00007f6d3f6904bb in KWindowSystem::windowChanged (this=<optimized out>, _t1=132120581, _t2=0x7ffc00516180) at moc_kwindowsystem.cpp:347
#32 0x00007f6d3f678d1b in NETEventFilter::nativeEventFilter (this=0x250ce20, ev=0x7f6d2800be50) at ../../src/kwindowsystem_x11.cpp:261
#33 0x00007f6d3b36a510 in QAbstractEventDispatcher::filterNativeEvent (this=this@entry=0xf1ea30, eventType=..., message=message@entry=0x7f6d2800be50, result=result@entry=0x7ffc00516278) at kernel/qabstracteventdispatcher.cpp:460
#34 0x00007f6d2f6f702d in QXcbConnection::handleXcbEvent (this=this@entry=0xeea5d0, event=event@entry=0x7f6d2800be50) at qxcbconnection.cpp:863
#35 0x00007f6d2f6f84bb in QXcbConnection::processXcbEvents (this=0xeea5d0) at qxcbconnection.cpp:1303
#36 0x00007f6d3b39f73a in QObject::event (this=0xeea5d0, e=<optimized out>) at kernel/qobject.cpp:1245
#37 0x00007f6d3bc77b2c in QApplicationPrivate::notify_helper (this=0xedd830, receiver=0xeea5d0, e=0x7f6d28009170) at kernel/qapplication.cpp:3720
#38 0x00007f6d3bc7d000 in QApplication::notify (this=0x7ffc00516af0, receiver=0xeea5d0, e=0x7f6d28009170) at kernel/qapplication.cpp:3503
#39 0x00007f6d3b36dc2b in QCoreApplication::notifyInternal (this=0x7ffc00516af0, receiver=0xeea5d0, event=event@entry=0x7f6d28009170) at kernel/qcoreapplication.cpp:935
#40 0x00007f6d3b36fc9b in sendEvent (event=0x7f6d28009170, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xed3280) at kernel/qcoreapplication.cpp:1552
#42 0x00007f6d3b370298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#43 0x00007f6d3b3c6843 in postEventSourceDispatch (s=0xf185b0) at kernel/qeventdispatcher_glib.cpp:271
#44 0x00007f6d371bac3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007f6d371baf20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f6d371bafcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f6d3b3c6c57 in QEventDispatcherGlib::processEvents (this=0xf1ea30, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#48 0x00007f6d3b36b3e2 in QEventLoop::exec (this=this@entry=0x7ffc00516970, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#49 0x00007f6d3b37302c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#50 0x00007f6d3b6b231c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#51 0x00007f6d3bc737a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#52 0x000000000042fd9b in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:158

Possible duplicates by query: bug 353831, bug 352531, bug 352095, bug 351347, bug 350658.

Reported using DrKonqi
Comment 1 David Edmundson 2015-10-20 09:49:54 UTC 
Thanks

5.2 is rather old. If you're on Kubuntu look for "Kubuntu backports"

*** This bug has been marked as a duplicate of bug 340583 ***