Application: plasmashell ()

Qt Version: 5.4.0
Operating System: Linux 3.19.0-rc6-custom x86_64
Distribution: Ubuntu 14.10

-- Information about the crash:
- What I was doing when the application crashed:
I clicked on the bluetooth tray icon and that immediately caused segmentation fault of plasmashell.

-- Backtrace:
Application: plasmashell (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7f9aee4880 (LWP 2534))]

Thread 32 (Thread 0x7f7f7ffff700 (LWP 2543)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f7fffed20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x1a54c90) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x1a54c90) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x1a54c90) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f7ffff700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 31 (Thread 0x7f7f7cd27700 (LWP 2569)):
#0  0x00007f7f92625df4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f7cd26d20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f7f96370074 in QThread::exec (this=this@entry=0x1f20840) at thread/qthread.cpp:503
#5  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x1f20840) at qml/ftw/qqmlthread.cpp:141
#6  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x1f20840) at thread/qthread_unix.cpp:337
#7  0x00007f7f955850a5 in start_thread (arg=0x7f7f7cd27700) at pthread_create.c:309
#8  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 30 (Thread 0x7f7f71d8c700 (LWP 2604)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f71d8bd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2025ce0) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2025ce0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2025ce0) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f71d8c700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 29 (Thread 0x7f7f70cdb700 (LWP 2605)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f70cdad20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2131680) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2131680) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2131680) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f70cdb700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 28 (Thread 0x7f7f637ff700 (LWP 2606)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f5c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f637fed20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2234620) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2234620) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2234620) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f637ff700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 27 (Thread 0x7f7f627fe700 (LWP 2607)):
#0  0x00007f7f95ce90ed in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92668ed0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f9262596c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625e83 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f627fdd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2327990) at thread/qthread.cpp:503
#8  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2327990) at qml/ftw/qqmlthread.cpp:141
#9  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2327990) at thread/qthread_unix.cpp:337
#10 0x00007f7f955850a5 in start_thread (arg=0x7f7f627fe700) at pthread_create.c:309
#11 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 26 (Thread 0x7f7f617fd700 (LWP 2608)):
#0  0x00007f7f92625d88 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f617fcd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f7f96370074 in QThread::exec (this=this@entry=0x23ec290) at thread/qthread.cpp:503
#5  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x23ec290) at qml/ftw/qqmlthread.cpp:141
#6  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x23ec290) at thread/qthread_unix.cpp:337
#7  0x00007f7f955850a5 in start_thread (arg=0x7f7f617fd700) at pthread_create.c:309
#8  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 25 (Thread 0x7f7f53fff700 (LWP 2609)):
#0  0x00007f7f92625454 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f92625e0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f4c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f53ffed20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x25083f0) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x25083f0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x25083f0) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f53fff700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 24 (Thread 0x7f7f52ffe700 (LWP 2610)):
#0  0x00007f7f95ce90f1 in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92668ed0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f9262596c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625e83 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f52ffdd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f7f96370074 in QThread::exec (this=this@entry=0x25d0cb0) at thread/qthread.cpp:503
#8  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x25d0cb0) at qml/ftw/qqmlthread.cpp:141
#9  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x25d0cb0) at thread/qthread_unix.cpp:337
#10 0x00007f7f955850a5 in start_thread (arg=0x7f7f52ffe700) at pthread_create.c:309
#11 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 23 (Thread 0x7f7f51ffd700 (LWP 2611)):
#0  0x00007f7f9636d33f in testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x26c3548: 0x0) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  testAndSetRelease<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, _q_value=@0x26c3548: 0x0) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:175
#2  testAndSetRelease (currentValue=<synthetic pointer>, newValue=0x0, expectedValue=0x1, this=this@entry=0x26c3548) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:272
#3  fastTryUnlock (current=<synthetic pointer>, this=this@entry=0x26c3548) at thread/qmutex.h:85
#4  QMutex::unlock (this=this@entry=0x26c3548) at thread/qmutex.cpp:264
#5  0x00007f7f96604bf5 in unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:138
#6  ~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:132
#7  canWaitLocked (this=<optimized out>) at ../../include/QtCore/5.4.0/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:244
#8  postEventSourcePrepare (timeout=<synthetic pointer>, s=0x7f7f48002700) at kernel/qeventdispatcher_glib.cpp:254
#9  postEventSourceCheck (source=0x7f7f48002700) at kernel/qeventdispatcher_glib.cpp:264
#10 0x00007f7f926258c1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f7f92625e83 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#14 0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f51ffcd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#15 0x00007f7f96370074 in QThread::exec (this=this@entry=0x26c3370) at thread/qthread.cpp:503
#16 0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x26c3370) at qml/ftw/qqmlthread.cpp:141
#17 0x00007f7f96374e4e in QThreadPrivate::start (arg=0x26c3370) at thread/qthread_unix.cpp:337
#18 0x00007f7f955850a5 in start_thread (arg=0x7f7f51ffd700) at pthread_create.c:309
#19 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 22 (Thread 0x7f7f50ffc700 (LWP 2612)):
#0  0x00007f7f95ce90ed in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92668ed0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f9262596c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625e83 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f50ffbd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f7f96370074 in QThread::exec (this=this@entry=0x27aa8a0) at thread/qthread.cpp:503
#8  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x27aa8a0) at qml/ftw/qqmlthread.cpp:141
#9  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x27aa8a0) at thread/qthread_unix.cpp:337
#10 0x00007f7f955850a5 in start_thread (arg=0x7f7f50ffc700) at pthread_create.c:309
#11 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 21 (Thread 0x7f7f437ff700 (LWP 2613)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f437fed20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x28ac820) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x28ac820) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x28ac820) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f437ff700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 20 (Thread 0x7f7f427fe700 (LWP 2615)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f427fdd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x299b270) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x299b270) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x299b270) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f427fe700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 19 (Thread 0x7f7f417fd700 (LWP 2618)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f417fcd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2a99300) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2a99300) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2a99300) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f417fd700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 18 (Thread 0x7f7f2ffff700 (LWP 2619)):
#0  begin (this=0x7f7f28002ed0) at ../../include/QtCore/../../src/corelib/tools/qlist.h:95
#1  constBegin (this=0x7f7f28002ed0) at ../../include/QtCore/../../src/corelib/tools/qlist.h:278
#2  QTimerInfoList::timerWait (this=0x7f7f28002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:384
#3  0x00007f7f966046ae in timerSourcePrepareHelper (timeout=0x7f7f2fffeb54, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#4  timerSourcePrepare (source=<optimized out>, timeout=0x7f7f2fffeb54) at kernel/qeventdispatcher_glib.cpp:160
#5  0x00007f7f9262546d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f7f92625e0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#9  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f2fffed20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007f7f96370074 in QThread::exec (this=this@entry=0x2b87150) at thread/qthread.cpp:503
#11 0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2b87150) at qml/ftw/qqmlthread.cpp:141
#12 0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2b87150) at thread/qthread_unix.cpp:337
#13 0x00007f7f955850a5 in start_thread (arg=0x7f7f2ffff700) at pthread_create.c:309
#14 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 17 (Thread 0x7f7f2effe700 (LWP 2620)):
#0  0x00007f7f9266a384 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f92626006 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#3  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f2effdd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2c7f6e0) at thread/qthread.cpp:503
#5  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2c7f6e0) at qml/ftw/qqmlthread.cpp:141
#6  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2c7f6e0) at thread/qthread_unix.cpp:337
#7  0x00007f7f955850a5 in start_thread (arg=0x7f7f2effe700) at pthread_create.c:309
#8  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 16 (Thread 0x7f7f2dffd700 (LWP 2621)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f240008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f2dffcd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2d7e6d0) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2d7e6d0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2d7e6d0) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f2dffd700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 15 (Thread 0x7f7f2cffc700 (LWP 2622)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7f180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f2cffbd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x2e87d50) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2e87d50) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2e87d50) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f2cffc700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 14 (Thread 0x7f7f1f7ff700 (LWP 2624)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7f9a041334 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f7f9a041379 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f7f955850a5 in start_thread (arg=0x7f7f1f7ff700) at pthread_create.c:309
#4  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7f7f1effe700 (LWP 2625)):
#0  0x00007f7f9636cefa in testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x2f72e08: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  testAndSetAcquire<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x2f72e08: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  testAndSetAcquire (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, this=0x2f72e08, this@entry=0x1) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:270
#3  fastTryLock (current=<synthetic pointer>, this=0x2f72e08, this@entry=0x1) at thread/qmutex.h:82
#4  QMutex::lock (this=this@entry=0x2f72e08) at thread/qmutex.cpp:212
#5  0x00007f7f9660484b in QMutexLocker (m=0x2f72e08, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  canWaitLocked (this=0x2f72de0) at ../../include/QtCore/5.4.0/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#7  postEventSourcePrepare (s=0x7f7e940012d0, timeout=0x7f7f1effdb54) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007f7f9262546d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f7f92625e0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#12 0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f1effdd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#13 0x00007f7f96370074 in QThread::exec (this=this@entry=0x2f705e0) at thread/qthread.cpp:503
#14 0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x2f705e0) at qml/ftw/qqmlthread.cpp:141
#15 0x00007f7f96374e4e in QThreadPrivate::start (arg=0x2f705e0) at thread/qthread_unix.cpp:337
#16 0x00007f7f955850a5 in start_thread (arg=0x7f7f1effe700) at pthread_create.c:309
#17 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 12 (Thread 0x7f7f1dffd700 (LWP 2631)):
#0  0x00007f7f926253ea in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f92625e0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e8c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f1dffcd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x32236d0) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x32236d0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x32236d0) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7f1dffd700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 11 (Thread 0x7f7f1c94e700 (LWP 2632)):
#0  0x00007f7f9266a369 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f926258cc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625e83 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7f1c94dcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f7f96370074 in QThread::exec (this=this@entry=0x32d4b70) at thread/qthread.cpp:503
#7  0x00007f7f9aba2256 in QQuickPixmapReader::run (this=0x32d4b70) at util/qquickpixmapcache.cpp:712
#8  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x32d4b70) at thread/qthread_unix.cpp:337
#9  0x00007f7f955850a5 in start_thread (arg=0x7f7f1c94e700) at pthread_create.c:309
#10 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7f7e883de700 (LWP 2648)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e883ddd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x4b34370) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x4b34370) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x4b34370) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7e883de700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7f7e7fddd700 (LWP 2659)):
#0  0x00007f7f95ce90ed in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92668ed0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f9262596c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625e83 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e7fddcd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f7f96370074 in QThread::exec (this=this@entry=0x4ed87a0) at thread/qthread.cpp:503
#8  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x4ed87a0) at qml/ftw/qqmlthread.cpp:141
#9  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x4ed87a0) at thread/qthread_unix.cpp:337
#10 0x00007f7f955850a5 in start_thread (arg=0x7f7e7fddd700) at pthread_create.c:309
#11 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7f7e7edcc700 (LWP 2660)):
#0  0x00007f7f9266a384 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f92625460 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625e0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e7edcbd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f7f96370074 in QThread::exec (this=this@entry=0x5f57b60) at thread/qthread.cpp:503
#7  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x5f57b60) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x5f57b60) at thread/qthread_unix.cpp:337
#9  0x00007f7f955850a5 in start_thread (arg=0x7f7e7edcc700) at pthread_create.c:309
#10 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7f7e7dcdb700 (LWP 2661)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e7dcdad20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x606e6f0) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x606e6f0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x606e6f0) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7e7dcdb700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f7e8bfa5700 (LWP 2667)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e8bfa4d20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x6840630) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x6840630) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x6840630) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7e8bfa5700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f7e8aeb2700 (LWP 2668)):
#0  0x00007f7f95ced3dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7f92625ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e8aeb1d20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f7f96370074 in QThread::exec (this=this@entry=0x618e740) at thread/qthread.cpp:503
#6  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x618e740) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x618e740) at thread/qthread_unix.cpp:337
#8  0x00007f7f955850a5 in start_thread (arg=0x7f7e8aeb2700) at pthread_create.c:309
#9  0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f7e66ffe700 (LWP 2758)):
#0  0x00007f7f9266a369 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7f92625337 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f92625e0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e66ffdd20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f7f96370074 in QThread::exec (this=this@entry=0x76f42d0) at thread/qthread.cpp:503
#7  0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x76f42d0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x76f42d0) at thread/qthread_unix.cpp:337
#9  0x00007f7f955850a5 in start_thread (arg=0x7f7e66ffe700) at pthread_create.c:309
#10 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f7e65fc6700 (LWP 2759)):
#0  0x00007f7f966046a9 in timerSourcePrepareHelper (timeout=0x7f7e65fc5b04, src=0x7ad10d0) at kernel/qeventdispatcher_glib.cpp:127
#1  timerSourcePrepare (source=0x7ad10d0, timeout=0x7f7e65fc5b04) at kernel/qeventdispatcher_glib.cpp:160
#2  0x00007f7f9262546d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f92625e0b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x6dbb270, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#6  0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e65fc5cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f7f96370074 in QThread::exec (this=this@entry=0x6d60610) at thread/qthread.cpp:503
#8  0x00007f7f9aba2256 in QQuickPixmapReader::run (this=0x6d60610) at util/qquickpixmapcache.cpp:712
#9  0x00007f7f96374e4e in QThreadPrivate::start (arg=0x6d60610) at thread/qthread_unix.cpp:337
#10 0x00007f7f955850a5 in start_thread (arg=0x7f7e65fc6700) at pthread_create.c:309
#11 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f7e67fff700 (LWP 12606)):
#0  0x00007f7f9636cefa in testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x7abfa98: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  testAndSetAcquire<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x7abfa98: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  testAndSetAcquire (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, this=0x7abfa98, this@entry=0x29) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:270
#3  fastTryLock (current=<synthetic pointer>, this=0x7abfa98, this@entry=0x29) at thread/qmutex.h:82
#4  QMutex::lock (this=this@entry=0x7abfa98) at thread/qmutex.cpp:212
#5  0x00007f7f96604be9 in QMutexLocker (m=0x7abfa98, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  canWaitLocked (this=0x7abfa70) at ../../include/QtCore/5.4.0/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#7  postEventSourcePrepare (timeout=<synthetic pointer>, s=0x7f7e5c0620a0) at kernel/qeventdispatcher_glib.cpp:254
#8  postEventSourceCheck (source=0x7f7e5c0620a0) at kernel/qeventdispatcher_glib.cpp:264
#9  0x00007f7f926258c1 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f7f92625e83 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f7f9660528c in QEventDispatcherGlib::processEvents (this=0x7f7e5c01c250, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#13 0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7f7e67ffed20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f7f96370074 in QThread::exec (this=this@entry=0x6c2f870) at thread/qthread.cpp:503
#15 0x00007f7f983552c5 in QQmlThreadPrivate::run (this=0x6c2f870) at qml/ftw/qqmlthread.cpp:141
#16 0x00007f7f96374e4e in QThreadPrivate::start (arg=0x6c2f870) at thread/qthread_unix.cpp:337
#17 0x00007f7f955850a5 in start_thread (arg=0x7f7e67fff700) at pthread_create.c:309
#18 0x00007f7f95cf788d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f7f9aee4880 (LWP 2534)):
[KCrash Handler]
#5  get_stencil_miptree (irb=<optimized out>) at ../../../../../../../src/mesa/drivers/dri/i965/brw_misc_state.c:225
#6  brw_workaround_depthstencil_alignment (brw=0x3300608, clear_mask=clear_mask@entry=50) at ../../../../../../../src/mesa/drivers/dri/i965/brw_misc_state.c:241
#7  0x00007f7f7dd6d202 in brw_clear (ctx=0x3300608, mask=50) at ../../../../../../../src/mesa/drivers/dri/i965/brw_clear.c:235
#8  0x00007f7f9abd5ef7 in QSGBatchRenderer::Renderer::renderBatches (this=this@entry=0x67510f0) at scenegraph/coreapi/qsgbatchrenderer.cpp:2402
#9  0x00007f7f9abdb60a in QSGBatchRenderer::Renderer::render (this=<optimized out>) at scenegraph/coreapi/qsgbatchrenderer.cpp:2590
#10 0x00007f7f9abe65e6 in QSGRenderer::renderScene (this=0x67510f0, bindable=...) at scenegraph/coreapi/qsgrenderer.cpp:206
#11 0x00007f7f9abe6a9b in QSGRenderer::renderScene (this=<optimized out>, fboId=<optimized out>) at scenegraph/coreapi/qsgrenderer.cpp:168
#12 0x00007f7f9abf538e in QSGRenderContext::renderNextFrame (this=0x1c1f380, renderer=0x67510f0, fboId=<optimized out>) at scenegraph/qsgcontext.cpp:554
#13 0x00007f7f9ac4079c in QQuickWindowPrivate::renderSceneGraph (this=0x6567980, size=...) at items/qquickwindow.cpp:379
#14 0x00007f7f9ac0fca6 in QSGGuiThreadRenderLoop::renderWindow (this=0x1bb2ef0, window=0x6566fc0) at scenegraph/qsgrenderloop.cpp:369
#15 0x00007f7f9ac107c1 in QSGGuiThreadRenderLoop::event (this=0x1bb2ef0, e=<optimized out>) at scenegraph/qsgrenderloop.cpp:467
#16 0x00007f7f96eacd3c in QApplicationPrivate::notify_helper (this=0x195f3d0, receiver=0x1bb2ef0, e=0x7fff3a988da0) at kernel/qapplication.cpp:3722
#17 0x00007f7f96eb2330 in QApplication::notify (this=0x7fff3a989150, receiver=0x1bb2ef0, e=0x7fff3a988da0) at kernel/qapplication.cpp:3505
#18 0x00007f7f965ae03b in QCoreApplication::notifyInternal (this=0x7fff3a989150, receiver=0x1bb2ef0, event=event@entry=0x7fff3a988da0) at kernel/qcoreapplication.cpp:932
#19 0x00007f7f966041a5 in sendEvent (event=0x7fff3a988da0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#20 QTimerInfoList::activateTimers (this=0x1991420) at kernel/qtimerinfo_unix.cpp:635
#21 0x00007f7f966045d1 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:177
#22 0x00007f7f92625c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f7f92625f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f7f92625ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f7f96605277 in QEventDispatcherGlib::processEvents (this=0x199a8e0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#26 0x00007f7f965ab8d2 in QEventLoop::exec (this=this@entry=0x7fff3a988ff0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#27 0x00007f7f965b337c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1185
#28 0x000000000042fcaf in main ()

Reported using DrKonqi