Bug 348055

Summary: Random crash of plasma
Product: [Plasma] plasmashell Reporter: Laurent Bonnaud <L.Bonnaud>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bhush94, plasma-bugs
Priority: NOR Keywords: drkonqi
Version: 5.3.0   
Target Milestone: 1.0   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Laurent Bonnaud 2015-05-21 11:35:37 UTC 
Application: plasmashell (5.3.0)

Qt Version: 5.4.1
Operating System: Linux 4.0.4-040004-generic x86_64
Distribution: Ubuntu 15.04

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

I was changing from virtual desktop.
I do that all the time and sometimes plasma crashes randomly.

-- 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 0x7f5fae7e77c0 (LWP 2855))]

Thread 39 (Thread 0x7f5f9a582700 (LWP 2857)):
#0  0x00007f5fa93908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fabb21b72 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7f5f9a581d00) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007f5fabb21b72 in _xcb_conn_wait (c=c@entry=0x13dd330, cond=cond@entry=0x13dd370, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:447
#3  0x00007f5fabb2364f in xcb_wait_for_event (c=0x13dd330) at ../../src/xcb_in.c:622
#4  0x00007f5f9c8c9099 in QXcbEventReader::run() (this=0x13e7230) at qxcbconnection.cpp:1105
#5  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x13e7230) at thread/qthread_unix.cpp:337
#6  0x00007f5fa8c176aa in start_thread (arg=0x7f5f9a582700) at pthread_create.c:333
#7  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 38 (Thread 0x7f5f8dfb2700 (LWP 2862)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5f88000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cbfe5e in g_main_context_acquire (context=0x7f5f88000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3196
#2  0x00007f5fa5cc0d75 in g_main_context_iterate (context=context@entry=0x7f5f88000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3758
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f88000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f880008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f8dfb1de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x16055b0) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x16055b0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x16055b0) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f8dfb2700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 37 (Thread 0x7f5f83d73700 (LWP 2877)):
#0  0x00007f5fa5d05789 in g_mutex_lock (mutex=mutex@entry=0x7f5f7c000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1336
#1  0x00007f5fa5cbfdf0 in g_main_context_acquire (context=0x7f5f7c000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3182
#2  0x00007f5fa5cc0d75 in g_main_context_iterate (context=context@entry=0x7f5f7c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3758
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f7c000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f7c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f83d72de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x189f020) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x189f020) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x189f020) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f83d73700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 36 (Thread 0x7f5f81611700 (LWP 2884)):
#0  0x00007f5fa9a099b2 in QMutex::lock() (this=this@entry=0x19a5328) at thread/qmutex.cpp:210
#1  0x00007f5fa9ca81db in postEventSourcePrepare(GSource*, gint*) (m=0x19a5328, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#2  0x00007f5fa9ca81db in postEventSourcePrepare(GSource*, gint*) (this=0x19a5300) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#3  0x00007f5fa9ca81db in postEventSourcePrepare(GSource*, gint*) (s=0x7f5f78002c00, timeout=timeout@entry=0x7f5f81610c14) at kernel/qeventdispatcher_glib.cpp:254
#4  0x00007f5fa5cc03fd in g_main_context_prepare (context=context@entry=0x7f5f78000990, priority=priority@entry=0x7f5f81610ca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3410
#5  0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5f78000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#6  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f78000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#7  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#8  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f81610de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#9  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x19a5150) at thread/qthread.cpp:503
#10 0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x19a5150) at qml/ftw/qqmlthread.cpp:141
#11 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x19a5150) at thread/qthread_unix.cpp:337
#12 0x00007f5fa8c176aa in start_thread (arg=0x7f5f81611700) at pthread_create.c:333
#13 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 35 (Thread 0x7f5f73fff700 (LWP 2890)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5f6c000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc08b9 in g_main_context_check (context=context@entry=0x7f5f6c000990, max_priority=2147483647, fds=fds@entry=0x7f5f6c007020, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3647
#2  0x00007f5fa5cc0e60 in g_main_context_iterate (context=context@entry=0x7f5f6c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f6c000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f73ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x1acca70) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x1acca70) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x1acca70) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f73fff700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 34 (Thread 0x7f5f72ffe700 (LWP 2892)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5f64000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc03f0 in g_main_context_prepare (context=context@entry=0x7f5f64000990, priority=priority@entry=0x7f5f72ffdca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3408
#2  0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5f64000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f64000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f72ffdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x1bc0d80) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x1bc0d80) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x1bc0d80) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f72ffe700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 33 (Thread 0x7f5f71ffd700 (LWP 2897)):
#0  0x00007f5fa93908b7 in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5f68007420, timeout=-1, context=0x7f5f68000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5f68000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f68000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f71ffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x1cb3380) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x1cb3380) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x1cb3380) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f71ffd700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 32 (Thread 0x7f5f70ffc700 (LWP 2898)):
#0  0x00007f5fa938c470 in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5d042f0 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f5f70ffbbd0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f5fa5d042f0 in g_wakeup_acknowledge (wakeup=0x7f5f680047c0) at /build/buildd/glib2.0-2.44.1/./glib/gwakeup.c:210
#3  0x00007f5fa5cc096c in g_main_context_check (context=context@entry=0x7f5f5c000990, max_priority=2147483647, fds=fds@entry=0x7f5f5c004e20, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3600
#4  0x00007f5fa5cc0e60 in g_main_context_iterate (context=context@entry=0x7f5f5c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#5  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f5c000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#6  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f5c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#7  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f70ffbde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x1da51f0) at thread/qthread.cpp:503
#9  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x1da51f0) at qml/ftw/qqmlthread.cpp:141
#10 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x1da51f0) at thread/qthread_unix.cpp:337
#11 0x00007f5fa8c176aa in start_thread (arg=0x7f5f70ffc700) at pthread_create.c:333
#12 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 31 (Thread 0x7f5f637ff700 (LWP 2899)):
#0  0x00007f5fa93908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5f58005220, timeout=-1, context=0x7f5f58000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5f58000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f58000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f637fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x1e82180) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x1e82180) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x1e82180) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f637ff700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 30 (Thread 0x7f5f627fe700 (LWP 2900)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5f50000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc06f9 in g_main_context_query (context=context@entry=0x7f5f50000990, max_priority=2147483647, timeout=timeout@entry=0x7f5f627fdca4, fds=fds@entry=0x7f5f50005420, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3557
#2  0x00007f5fa5cc0e37 in g_main_context_iterate (context=context@entry=0x7f5f50000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3790
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f50000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f627fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x1fac610) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x1fac610) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x1fac610) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f627fe700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 29 (Thread 0x7f5f617fd700 (LWP 2901)):
#0  0x00007f5fa5d05789 in g_mutex_lock (mutex=mutex@entry=0x7f5f54000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1336
#1  0x00007f5fa5cc0fb8 in g_main_context_iteration (context=0x7f5f54000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3868
#2  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f617fcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x208cba0) at thread/qthread.cpp:503
#5  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x208cba0) at qml/ftw/qqmlthread.cpp:141
#6  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x208cba0) at thread/qthread_unix.cpp:337
#7  0x00007f5fa8c176aa in start_thread (arg=0x7f5f617fd700) at pthread_create.c:333
#8  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 28 (Thread 0x7f5f4ffff700 (LWP 2903)):
#0  0x00007f5fa5cc0390 in g_main_context_prepare (context=context@entry=0x7f5f48000990, priority=priority@entry=0x7f5f4fffeca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3388
#1  0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5f48000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#2  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f48000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#3  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f4fffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x21733a0) at thread/qthread.cpp:503
#6  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x21733a0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x21733a0) at thread/qthread_unix.cpp:337
#8  0x00007f5fa8c176aa in start_thread (arg=0x7f5f4ffff700) at pthread_create.c:333
#9  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 27 (Thread 0x7f5f4effe700 (LWP 2904)):
#0  0x00007f5fa9ca81cc in postEventSourcePrepare(GSource*, gint*) (s=0x7f5f40004e00, timeout=timeout@entry=0x7f5f4effdc14) at kernel/qeventdispatcher_glib.cpp:253
#1  0x00007f5fa5cc03fd in g_main_context_prepare (context=context@entry=0x7f5f40000990, priority=priority@entry=0x7f5f4effdca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3410
#2  0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5f40000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f40000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f4effdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x22562e0) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x22562e0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x22562e0) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5f4effe700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 26 (Thread 0x7f5f4dffd700 (LWP 2905)):
#0  0x00007f5fa5d05798 in g_mutex_lock (mutex=mutex@entry=0x7f5f44000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1337
#1  0x00007f5fa5cc0fb8 in g_main_context_iteration (context=0x7f5f44000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3868
#2  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5f440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5f4dffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x2358810) at thread/qthread.cpp:503
#5  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x2358810) at qml/ftw/qqmlthread.cpp:141
#6  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x2358810) at thread/qthread_unix.cpp:337
#7  0x00007f5fa8c176aa in start_thread (arg=0x7f5f4dffd700) at pthread_create.c:333
#8  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7f5f4cffc700 (LWP 2906)):
#0  0x00007f5fa8c1cda0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5fad940644 in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7f5fada31f40 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f5fad940689 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f5fa8c176aa in start_thread (arg=0x7f5f4cffc700) at pthread_create.c:333
#4  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7f5ebffff700 (LWP 2907)):
#0  0x00007f5fa5d05789 in g_mutex_lock (mutex=mutex@entry=0x7f5eb8000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1336
#1  0x00007f5fa5cc0a16 in g_main_context_dispatch (context=context@entry=0x7f5eb8000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3733
#2  0x00007f5fa5cc0f20 in g_main_context_iterate (context=context@entry=0x7f5eb8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3808
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5eb8000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5eb80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5ebfffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x245a690) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x245a690) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x245a690) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5ebffff700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7f5ebdcb0700 (LWP 2921)):
#0  0x00007f5fa93908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5eb0007420, timeout=-1, context=0x7f5eb0000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5eb0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5eb0000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5eb00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5ebdcafde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x26212c0) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x26212c0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x26212c0) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5ebdcb0700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7f5eb7fff700 (LWP 2928)):
#0  0x00007f5fa9a09e0f in QMutex::unlock() (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x275fae8: 0x0) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  0x00007f5fa9a09e0f in QMutex::unlock() (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x275fae8: 0x0) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:175
#2  0x00007f5fa9a09e0f in QMutex::unlock() (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, this=this@entry=0x275fae8) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:272
#3  0x00007f5fa9a09e0f in QMutex::unlock() (current=<synthetic pointer>, this=this@entry=0x275fae8) at thread/qmutex.h:85
#4  0x00007f5fa9a09e0f in QMutex::unlock() (this=this@entry=0x275fae8) at thread/qmutex.cpp:264
#5  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:138
#6  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:132
#7  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (this=0x275fac0) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:244
#8  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (s=0x7f5eac002e00, timeout=timeout@entry=0x7f5eb7ffebc4) at kernel/qeventdispatcher_glib.cpp:254
#9  0x00007f5fa5cc03fd in g_main_context_prepare (context=context@entry=0x7f5eac000990, priority=priority@entry=0x7f5eb7ffec50) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3410
#10 0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5eac000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#11 0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5eac000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#12 0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5eac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#13 0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5eb7ffed90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x275eac0) at thread/qthread.cpp:503
#15 0x00007f5fae4a9b56 in QQuickPixmapReader::run() (this=0x275eac0) at util/qquickpixmapcache.cpp:714
#16 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x275eac0) at thread/qthread_unix.cpp:337
#17 0x00007f5fa8c176aa in start_thread (arg=0x7f5eb7fff700) at pthread_create.c:333
#18 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7f5eb67fe700 (LWP 3043)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5ea4000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc0ddb in g_main_context_iterate (context=context@entry=0x7f5ea4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3786
#2  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5ea4000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#3  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5ea40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5eb67fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x3b128d0) at thread/qthread.cpp:503
#6  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x3b128d0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x3b128d0) at thread/qthread_unix.cpp:337
#8  0x00007f5fa8c176aa in start_thread (arg=0x7f5eb67fe700) at pthread_create.c:333
#9  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7f5ea9e75700 (LWP 3087)):
#0  0x00007f5fa93908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5ea0005330, timeout=-1, context=0x7f5ea0000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5ea0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5ea0000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5ea00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5ea9e74de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x4862250) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x4862250) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x4862250) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5ea9e75700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7f5ea8d72700 (LWP 3088)):
#0  0x00007f5fa5d05798 in g_mutex_lock (mutex=mutex@entry=0x7f5e98000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1337
#1  0x00007f5fa5cc0e7e in g_main_context_iterate (context=context@entry=0x7f5e98000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3812
#2  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e98000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#3  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5ea8d71de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x491dbd0) at thread/qthread.cpp:503
#6  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x491dbd0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x491dbd0) at thread/qthread_unix.cpp:337
#8  0x00007f5fa8c176aa in start_thread (arg=0x7f5ea8d72700) at pthread_create.c:333
#9  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f5e9f7ff700 (LWP 3089)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5e94000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cbfe5e in g_main_context_acquire (context=0x7f5e94000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3196
#2  0x00007f5fa5cc0d75 in g_main_context_iterate (context=context@entry=0x7f5e94000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3758
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e94000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e9f7fede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x4b5bc60) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x4b5bc60) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x4b5bc60) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e9f7ff700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f5e9e7fe700 (LWP 3090)):
#0  0x00007f5fa5d05789 in g_mutex_lock (mutex=mutex@entry=0x7f5e8c000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1336
#1  0x00007f5fa5cc0641 in g_main_context_query (context=context@entry=0x7f5e8c000990, max_priority=2147483647, timeout=timeout@entry=0x7f5e9e7fdca4, fds=fds@entry=0x7f5e8c005220, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3512
#2  0x00007f5fa5cc0e37 in g_main_context_iterate (context=context@entry=0x7f5e8c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3790
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e8c000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e8c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e9e7fdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x4ca3a90) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x4ca3a90) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x4ca3a90) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e9e7fe700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f5e9d7fd700 (LWP 3091)):
#0  0x00007f5fa93908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5e90005220, timeout=-1, context=0x7f5e90000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5e90000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e90000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e9d7fcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x4d96d40) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x4d96d40) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x4d96d40) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e9d7fd700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f5e8bfff700 (LWP 3092)):
#0  0x00007ffe88b4592c in  ()
#1  0x00007ffe88b45c49 in clock_gettime ()
#2  0x00007f5fa93aa38d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007f5fa9ac7cb6 in qt_gettime() (ts=0x7f5e8bffeb40, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#4  0x00007f5fa9ac7cb6 in qt_gettime() (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:161
#5  0x00007f5fa9ac7cb6 in qt_gettime() () at tools/qelapsedtimer_unix.cpp:170
#6  0x00007f5fa9ca6639 in QTimerInfoList::updateCurrentTime() (this=this@entry=0x7f5e84005200) at kernel/qtimerinfo_unix.cpp:84
#7  0x00007f5fa9ca6ba5 in QTimerInfoList::timerWait(timespec&) (this=0x7f5e84005200, tm=...) at kernel/qtimerinfo_unix.cpp:379
#8  0x00007f5fa9ca803e in timerSourcePrepare(GSource*, gint*) (timeout=0x7f5e8bffec14, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#9  0x00007f5fa9ca803e in timerSourcePrepare(GSource*, gint*) (source=<optimized out>, timeout=timeout@entry=0x7f5e8bffec14) at kernel/qeventdispatcher_glib.cpp:160
#10 0x00007f5fa5cc03fd in g_main_context_prepare (context=context@entry=0x7f5e84000990, priority=priority@entry=0x7f5e8bffeca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3410
#11 0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5e84000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#12 0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e84000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#13 0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#14 0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e8bffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#15 0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x4e87620) at thread/qthread.cpp:503
#16 0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x4e87620) at qml/ftw/qqmlthread.cpp:141
#17 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x4e87620) at thread/qthread_unix.cpp:337
#18 0x00007f5fa8c176aa in start_thread (arg=0x7f5e8bfff700) at pthread_create.c:333
#19 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f5e8affe700 (LWP 3093)):
#0  0x00007f5fa938c470 in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5d042f0 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f5e8affdbd0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f5fa5d042f0 in g_wakeup_acknowledge (wakeup=0x7f5e84002780) at /build/buildd/glib2.0-2.44.1/./glib/gwakeup.c:210
#3  0x00007f5fa5cc096c in g_main_context_check (context=context@entry=0x7f5e7c000990, max_priority=2147483647, fds=fds@entry=0x7f5e7c005020, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3600
#4  0x00007f5fa5cc0e60 in g_main_context_iterate (context=context@entry=0x7f5e7c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#5  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e7c000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#6  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e7c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#7  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e8affdde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x4f6c840) at thread/qthread.cpp:503
#9  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x4f6c840) at qml/ftw/qqmlthread.cpp:141
#10 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x4f6c840) at thread/qthread_unix.cpp:337
#11 0x00007f5fa8c176aa in start_thread (arg=0x7f5e8affe700) at pthread_create.c:333
#12 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f5e89ffd700 (LWP 3094)):
#0  0x00007f5fa9ca81e8 in postEventSourcePrepare(GSource*, gint*) (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:138
#1  0x00007f5fa9ca81e8 in postEventSourcePrepare(GSource*, gint*) (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:132
#2  0x00007f5fa9ca81e8 in postEventSourcePrepare(GSource*, gint*) (this=0x5065cf0) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:244
#3  0x00007f5fa9ca81e8 in postEventSourcePrepare(GSource*, gint*) (s=0x7f5e80002c00, timeout=timeout@entry=0x7f5e89ffcc14) at kernel/qeventdispatcher_glib.cpp:254
#4  0x00007f5fa5cc03fd in g_main_context_prepare (context=context@entry=0x7f5e80000990, priority=priority@entry=0x7f5e89ffcca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3410
#5  0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5e80000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#6  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e80000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#7  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#8  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e89ffcde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#9  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x5065c60) at thread/qthread.cpp:503
#10 0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x5065c60) at qml/ftw/qqmlthread.cpp:141
#11 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x5065c60) at thread/qthread_unix.cpp:337
#12 0x00007f5fa8c176aa in start_thread (arg=0x7f5e89ffd700) at pthread_create.c:333
#13 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f5e7ab44700 (LWP 3097)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5e74000990) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cbfe5e in g_main_context_acquire (context=0x7f5e74000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3196
#2  0x00007f5fa5cc0d75 in g_main_context_iterate (context=context@entry=0x7f5e74000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3758
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e74000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e7ab43dc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f5e7bb57cf7 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x54f0690) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e7ab44700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f5e79ce5700 (LWP 3098)):
#0  0x00007f5fa5cc0814 in g_main_context_check (context=context@entry=0x7f5e6c000990, max_priority=2147483647, fds=fds@entry=0x7f5e6c005020, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3636
#1  0x00007f5fa5cc0e60 in g_main_context_iterate (context=context@entry=0x7f5e6c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#2  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e6c000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#3  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e79ce4de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x554d5f0) at thread/qthread.cpp:503
#6  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x554d5f0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x554d5f0) at thread/qthread_unix.cpp:337
#8  0x00007f5fa8c176aa in start_thread (arg=0x7f5e79ce5700) at pthread_create.c:333
#9  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f5e78be2700 (LWP 3099)):
#0  0x00007f5fa93908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5e70003220, timeout=-1, context=0x7f5e70000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5e70000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e70000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e78be1de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x56268c0) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x56268c0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x56268c0) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e78be2700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f5e6b7d3700 (LWP 3100)):
#0  0x00007f5fa93908b0 in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5e64007420, timeout=-1, context=0x7f5e64000990) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5e64000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e64000990, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e6b7d2de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x5997c80) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x5997c80) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x5997c80) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e6b7d3700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f5e6a6d0700 (LWP 3101)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x5a65300) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc0852 in g_main_context_check (context=context@entry=0x5a65300, max_priority=2147483647, fds=fds@entry=0x5a5e1b0, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3716
#2  0x00007f5fa5cc0e60 in g_main_context_iterate (context=context@entry=0x5a65300, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x5a65300, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x5a61ed0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e6a6cfde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x5a64c40) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x5a64c40) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x5a64c40) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e6a6d0700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f5e62bdf700 (LWP 3179)):
#0  0x00007f5fa938c49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5fa5d042f0 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f5e62bdebd0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f5fa5d042f0 in g_wakeup_acknowledge (wakeup=0x5a5b810) at /build/buildd/glib2.0-2.44.1/./glib/gwakeup.c:210
#3  0x00007f5fa5cc096c in g_main_context_check (context=context@entry=0x7f5e640075c0, max_priority=2147483647, fds=fds@entry=0x7f5e64009d50, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3600
#4  0x00007f5fa5cc0e60 in g_main_context_iterate (context=context@entry=0x7f5e640075c0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3805
#5  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e640075c0, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#6  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e640074f0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#7  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e62bdede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x622cb10) at thread/qthread.cpp:503
#9  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x622cb10) at qml/ftw/qqmlthread.cpp:141
#10 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x622cb10) at thread/qthread_unix.cpp:337
#11 0x00007f5fa8c176aa in start_thread (arg=0x7f5e62bdf700) at pthread_create.c:333
#12 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f5e60f60700 (LWP 32447)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5e701a5db0) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc0fd6 in g_main_context_iteration (context=0x7f5e701a5db0, may_block=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3870
#2  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e700201b0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e60f5fde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x7b4f380) at thread/qthread.cpp:503
#5  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x7b4f380) at qml/ftw/qqmlthread.cpp:141
#6  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x7b4f380) at thread/qthread_unix.cpp:337
#7  0x00007f5fa8c176aa in start_thread (arg=0x7f5e60f60700) at pthread_create.c:333
#8  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5e5feaf700 (LWP 32448)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5e6c0051c0) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc0d6d in g_main_context_iterate (context=context@entry=0x7f5e6c0051c0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3756
#2  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e6c0051c0, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#3  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e6c0050f0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e5feaede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x6bb4460) at thread/qthread.cpp:503
#6  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x6bb4460) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x6bb4460) at thread/qthread_unix.cpp:337
#8  0x00007f5fa8c176aa in start_thread (arg=0x7f5e5feaf700) at pthread_create.c:333
#9  0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f5e5eb88700 (LWP 32471)):
#0  0x00007f5fa5d057a4 in g_mutex_unlock (mutex=0x7f5e74008160) at /build/buildd/glib2.0-2.44.1/./glib/gthread-posix.c:1348
#1  0x00007f5fa5cc03f0 in g_main_context_prepare (context=context@entry=0x7f5e74008160, priority=priority@entry=0x7f5e5eb87ca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3408
#2  0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5e74008160, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#3  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e74008160, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#4  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e74014140, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e5eb87de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x7901870) at thread/qthread.cpp:503
#7  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x7901870) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x7901870) at thread/qthread_unix.cpp:337
#9  0x00007f5fa8c176aa in start_thread (arg=0x7f5e5eb88700) at pthread_create.c:333
#10 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f5e5da87700 (LWP 32472)):
#0  0x00007f5fa5cd03e2 in g_poll (__timeout=-1, __nfds=1, __fds=0x7f5e8015e690) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#1  0x00007f5fa5cd03e2 in g_poll (fds=0x7f5e8015e690, nfds=1, timeout=-1) at /build/buildd/glib2.0-2.44.1/./glib/gpoll.c:124
#2  0x00007f5fa5cc0ebc in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f5e8015e690, timeout=-1, context=0x7f5e8001ca00) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:4103
#3  0x00007f5fa5cc0ebc in g_main_context_iterate (context=context@entry=0x7f5e8001ca00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3803
#4  0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e8001ca00, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#5  0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e8000a540, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e5da86de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x7614f70) at thread/qthread.cpp:503
#8  0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x7614f70) at qml/ftw/qqmlthread.cpp:141
#9  0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x7614f70) at thread/qthread_unix.cpp:337
#10 0x00007f5fa8c176aa in start_thread (arg=0x7f5e5da87700) at pthread_create.c:333
#11 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f5e5c82d700 (LWP 914)):
#0  0x00007f5fa9a09e0f in QMutex::unlock() (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x6232a38: 0x0) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  0x00007f5fa9a09e0f in QMutex::unlock() (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x6232a38: 0x0) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:175
#2  0x00007f5fa9a09e0f in QMutex::unlock() (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, this=this@entry=0x6232a38) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:272
#3  0x00007f5fa9a09e0f in QMutex::unlock() (current=<synthetic pointer>, this=this@entry=0x6232a38) at thread/qmutex.h:85
#4  0x00007f5fa9a09e0f in QMutex::unlock() (this=this@entry=0x6232a38) at thread/qmutex.cpp:264
#5  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:138
#6  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:132
#7  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (this=0x6232a10) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:244
#8  0x00007f5fa9ca81ed in postEventSourcePrepare(GSource*, gint*) (s=0x7f5e7c00b200, timeout=timeout@entry=0x7f5e5c82cc14) at kernel/qeventdispatcher_glib.cpp:254
#9  0x00007f5fa5cc03fd in g_main_context_prepare (context=context@entry=0x7f5e7c0051c0, priority=priority@entry=0x7f5e5c82cca0) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3410
#10 0x00007f5fa5cc0de8 in g_main_context_iterate (context=context@entry=0x7f5e7c0051c0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3788
#11 0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5e7c0051c0, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#12 0x00007f5fa9ca8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5e7c0050f0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#13 0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5e5c82cde0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f5fa9a0cb44 in QThread::exec() (this=this@entry=0x6abc0f0) at thread/qthread.cpp:503
#15 0x00007f5fab79af65 in QQmlThreadPrivate::run() (this=0x6abc0f0) at qml/ftw/qqmlthread.cpp:141
#16 0x00007f5fa9a11b0e in QThreadPrivate::start(void*) (arg=0x6abc0f0) at thread/qthread_unix.cpp:337
#17 0x00007f5fa8c176aa in start_thread (arg=0x7f5e5c82d700) at pthread_create.c:333
#18 0x00007f5fa939beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5fae7e77c0 (LWP 2855)):
[KCrash Handler]
#6  0x00007f5fa9bfce7c in QVector<QAbstractItemModelPrivate::Change>::reallocData(int, int, QFlags<QArrayData::AllocationOption>) (c=..., this=0x8e50ff0) at ../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/itemmodels/qabstractitemmodel_p.h:128
#7  0x00007f5fa9bfce7c in QVector<QAbstractItemModelPrivate::Change>::reallocData(int, int, QFlags<QArrayData::AllocationOption>) (this=this@entry=0x47aad30, asize=-1, aalloc=<optimized out>, options=...) at ../../include/QtCore/../../src/corelib/tools/qvector.h:515
#8  0x00007f5fa9bf7b9a in QAbstractItemModel::endRemoveRows() (asize=<optimized out>, this=0x47aad30) at ../../include/QtCore/../../src/corelib/tools/qvector.h:381
#9  0x00007f5fa9bf7b9a in QAbstractItemModel::endRemoveRows() (this=0x47aad30) at ../../include/QtCore/../../src/corelib/tools/qstack.h:58
#10 0x00007f5fa9bf7b9a in QAbstractItemModel::endRemoveRows() (this=0x47aee10) at itemmodels/qabstractitemmodel.cpp:2675
#11 0x00007f5eaaf7810c in TaskManager::TasksModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (item=<optimized out>, this=<optimized out>) at ../../libtaskmanager/tasksmodel.cpp:484
#12 0x00007f5eaaf7810c in TaskManager::TasksModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=0x7ffe88ad6f90) at ./moc_tasksmodel.cpp:210
#13 0x00007f5fa9c809c9 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x63126a0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffe88ad6f90) at kernel/qobject.cpp:3716
#14 0x00007f5fa9c81057 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7f5eab19a720 <TaskManager::TaskGroup::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffe88ad6f90) at kernel/qobject.cpp:3582
#15 0x00007f5eaaf697f2 in TaskManager::TaskGroup::itemRemoved(TaskManager::AbstractGroupableItem*) (this=<optimized out>, _t1=0x1f776f0) at ./moc_taskgroup.cpp:418
#16 0x00007f5eaaf6a383 in TaskManager::TaskGroup::Private::signalRemovals() (this=0x5eac6d0) at ../../libtaskmanager/taskgroup.cpp:271
#17 0x00007f5eaaf6bf99 in TaskManager::TaskGroup::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=0x7f5fa9d26ed8 <qt_array+24>, _c=2097368319, _id=-1440158912, _a=0x8e50ff0) at ./moc_taskgroup.cpp:213
#18 0x00007f5fa9c8173a in QObject::event(QEvent*) (this=0x63126a0, e=<optimized out>) at kernel/qobject.cpp:1245
#19 0x00007f5faa559b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=0x13d0450, receiver=0x63126a0, e=0x70f5130) at kernel/qapplication.cpp:3720
#20 0x00007f5faa55f000 in QApplication::notify(QObject*, QEvent*) (this=0x7ffe88ad76e0, receiver=0x63126a0, e=0x70f5130) at kernel/qapplication.cpp:3503
#21 0x00007f5fa9c4fc2b in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe88ad76e0, receiver=0x63126a0, event=event@entry=0x70f5130) at kernel/qcoreapplication.cpp:935
#22 0x00007f5fa9c51c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x70f5130, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#23 0x00007f5fa9c51c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x13c5f10) at kernel/qcoreapplication.cpp:1552
#24 0x00007f5fa9c52298 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#25 0x00007f5fa9ca8843 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x1466bd0) at kernel/qeventdispatcher_glib.cpp:271
#26 0x00007f5fa5cc0c3d in g_main_context_dispatch (context=0x7f5f94005000) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3122
#27 0x00007f5fa5cc0c3d in g_main_context_dispatch (context=context@entry=0x7f5f94005000) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3737
#28 0x00007f5fa5cc0f20 in g_main_context_iterate (context=context@entry=0x7f5f94005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3808
#29 0x00007f5fa5cc0fcc in g_main_context_iteration (context=0x7f5f94005000, may_block=1) at /build/buildd/glib2.0-2.44.1/./glib/gmain.c:3869
#30 0x00007f5fa9ca8c57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x13c2c40, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#31 0x00007f5fa9c4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe88ad7560, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#32 0x00007f5fa9c5502c in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1188
#33 0x00007f5fa9f9431c in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1510
#34 0x00007f5faa5557a5 in QApplication::exec() () at kernel/qapplication.cpp:2956
#35 0x00000000004301b3 in main(int, char**) (argc=2, argv=<optimized out>) at ../../shell/main.cpp:154

Possible duplicates by query: bug 347947, bug 347619, bug 344986, bug 344224, bug 342763.

Reported using DrKonqi
Comment 1 David Edmundson 2015-05-21 11:37:08 UTC 
Thanks, will be fixed in the next release. As a fast workaround remove the window list applet.

*** This bug has been marked as a duplicate of bug 342763 ***