Application: plasmashell (5.3.2)
 (Compiled from sources)
Qt Version: 5.4.1
Operating System: Linux 3.16.0-36-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
I was restating the laptop.  Crashed during loading startup items.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8f31b467c0 (LWP 4371))]

Thread 21 (Thread 0x7f8f1d6a4700 (LWP 4377)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f2ee51b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8f2ee5364f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f8f1f9eb099 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2bf456aa in start_thread (arg=0x7f8f1d6a4700) at pthread_create.c:333
#6  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7f8f10df8700 (LWP 4380)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28de0242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f171f1af6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f8f28e06955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f2bf456aa in start_thread (arg=0x7f8f10df8700) at pthread_create.c:333
#6  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7f8f0bfff700 (LWP 4381)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f28de0009 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f28e06955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f2bf456aa in start_thread (arg=0x7f8f0bfff700) at pthread_create.c:333
#6  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f8f0b7fe700 (LWP 4428)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8f0b7fe700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f8ef6e56700 (LWP 4441)):
#0  0x00007f8f28e24789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddfdbd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8ef6e56700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f8ef4ee2700 (LWP 4490)):
#0  0x00007f8f28e247a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddf3f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddfde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8f2bf456aa in start_thread (arg=0x7f8ef4ee2700) at pthread_create.c:333
#10 0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f8eef7ff700 (LWP 4494)):
#0  0x00007f8f2cd37e0f in QMutex::unlock() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f8f2cfd61ed in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f8f28ddf3fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f28ddfde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f8f2bf456aa in start_thread (arg=0x7f8eef7ff700) at pthread_create.c:333
#11 0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f8eee7fe700 (LWP 4495)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8eee7fe700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f8eed7fd700 (LWP 4496)):
#0  0x00007f8f2c6ba49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28e232f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddf96c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f28ddfe60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f8f2bf456aa in start_thread (arg=0x7f8eed7fd700) at pthread_create.c:333
#11 0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f8edbfff700 (LWP 4500)):
#0  0x00007f8f28e24780 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddf73e in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddfe60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8f2bf456aa in start_thread (arg=0x7f8edbfff700) at pthread_create.c:333
#10 0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f8edaffe700 (LWP 4501)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8edaffe700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f8ed9ffd700 (LWP 4502)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8f30c85644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f8f30c85689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f8f2bf456aa in start_thread (arg=0x7f8ed9ffd700) at pthread_create.c:333
#4  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f8ed96fc700 (LWP 4503)):
#0  0x00007f8f28ddf3f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddfde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8ed96fc700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f8e48e33700 (LWP 4587)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8e48e33700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f8e425ef700 (LWP 4596)):
#0  0x00007f8f28e24789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddfea2 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8e425ef700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f8e3bb76700 (LWP 4653)):
#0  0x00007f8f28ddf630 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddfe37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8e3bb76700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f8e3aa75700 (LWP 4654)):
#0  0x00007f8f28ddceb3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddf7ef in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddfe60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8f2bf456aa in start_thread (arg=0x7f8e3aa75700) at pthread_create.c:333
#10 0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f8e32551700 (LWP 4713)):
#0  0x00007f8f28e24789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8f28ddf409 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddfde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8e33549cf7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8f2bf456aa in start_thread (arg=0x7f8e32551700) at pthread_create.c:333
#10 0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f8e316ba700 (LWP 4722)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8e316ba700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f8e27fff700 (LWP 4723)):
#0  0x00007f8f2c6be8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8f28ddfebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8f2cd3ab44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8f2eac9f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8f2cd3fb0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8f2bf456aa in start_thread (arg=0x7f8e27fff700) at pthread_create.c:333
#9  0x00007f8f2c6c9eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f8f31b467c0 (LWP 4371)):
[KCrash Handler]
#6  brw_update_renderbuffer_surface (brw=0x288f948, rb=0x4ea45e0, layered=<optimized out>, unit=0, surf_index=<optimized out>) at ../../../../../../../src/mesa/drivers/dri/i965/intel_mipmap_tree.h:734
#7  0x00007f8efb92f690 in brw_update_renderbuffer_surfaces (brw=0x288f948, fb=0x4e9c010, render_target_start=0, surf_offset=0x28b4014) at ../../../../../../../src/mesa/drivers/dri/i965/brw_wm_surface_state.c:753
#8  0x00007f8efb92f729 in update_renderbuffer_surfaces (brw=0x288f948) at ../../../../../../../src/mesa/drivers/dri/i965/brw_wm_surface_state.c:775
#9  0x00007f8efb9042a4 in brw_upload_render_state (brw=0x288f948) at ../../../../../../../src/mesa/drivers/dri/i965/brw_state_upload.c:667
#10 0x00007f8efb890091 in brw_draw_prims (ctx=0x288f948, prims=<optimized out>, nr_prims=<optimized out>, ib=<optimized out>, index_bounds_valid=<optimized out>, min_index=0, max_index=3, unused_tfb_object=0x0, stream=0, indirect=0x0) at ../../../../../../../src/mesa/drivers/dri/i965/brw_draw.c:516
#11 0x00007f8efb6c0d26 in vbo_draw_arrays (ctx=0x288f948, mode=6, start=0, count=4, numInstances=1, baseInstance=0) at ../../../../src/mesa/vbo/vbo_exec_array.c:645
#12 0x00007f8efb73fe2e in meta_clear (ctx=0x288f948, buffers=<optimized out>, glsl=<optimized out>) at ../../../../src/mesa/drivers/common/meta.c:1814
#13 0x00007f8efb87d6ec in brw_clear (ctx=0x288f948, mask=0) at ../../../../../../../src/mesa/drivers/dri/i965/brw_clear.c:264
#14 0x00007f8f3182ea87 in QSGBatchRenderer::Renderer::renderBatches() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f8f3183436a in QSGBatchRenderer::Renderer::render() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f8f3183f456 in QSGRenderer::renderScene(QSGBindable const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007f8f3183f90b in QSGRenderer::renderScene(unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f8f3184e31e in QSGRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f8f3189a0cc in QQuickWindowPrivate::renderSceneGraph(QSize const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f8f31868e56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f8f31869979 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007f8f2d887b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f8f2d88d000 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f8f2cf7dc2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f8f2cfd5ae5 in QTimerInfoList::activateTimers() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f8f2cfd5f61 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f8f28ddfc3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f8f28ddff20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f8f28ddffcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f8f2cfd6c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f8f2cf7b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f8f2cf8302c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x0000000000430253 in main (argc=2, argv=<optimized out>) at ../../shell/main.cpp:154

Possible duplicates by query: bug 349794.

Reported using DrKonqi