Bug 364362

Summary: Random KWin Crashes
Product: [Plasma] kwin Reporter: pmlyon
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version: 5.5.5   
Target Milestone: ---   
Platform: Compiled Sources   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description pmlyon 2016-06-16 03:21:33 UTC 
Application: kwin_x11 (5.5.5)
 (Compiled from sources)
Qt Version: 5.5.1
Operating System: Linux 4.4.6-gentoo x86_64
Distribution: "NAME=Gentoo"

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

Moved a window to a corner to be 1/4 the size of screen. This crash happens with random application. KWin could crash when opening a program or waking the monitor up.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7feec828c880 (LWP 7929))]

Thread 17 (Thread 0x7feea8bf3700 (LWP 7945)):
#0  0x00007feec7b7f0e3 in select () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007feec6478a71 in qt_safe_select (nfds=13, fdread=0x7fee9c000a78, fdwrite=0x7fee9c000d08, fdexcept=0x7fee9c000f98, orig_timeout=<optimized out>) at kernel/qcore_unix.cpp:75
#2  0x00007feec647904d in QEventDispatcherUNIX::select (this=<optimized out>, nfds=<optimized out>, readfds=<optimized out>, writefds=<optimized out>, exceptfds=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_unix.cpp:320
#3  0x00007feec647a1a8 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7fee9c0008e0, flags=..., flags@entry=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007feec647a627 in QEventDispatcherUNIX::processEvents (this=0x7fee9c0008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007feec642e149 in QEventLoop::processEvents (this=this@entry=0x7feea8bf2d10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:128
#6  0x00007feec642e553 in QEventLoop::exec (this=this@entry=0x7feea8bf2d10, flags=flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007feec62958eb in QThread::exec (this=this@entry=0xed43f0) at thread/qthread.cpp:503
#8  0x00007feec0fd5e50 in QQmlThreadPrivate::run (this=0xed43f0) at qml/ftw/qqmlthread.cpp:141
#9  0x00007feec6299f68 in QThreadPrivate::start (arg=0xed43f0) at thread/qthread_unix.cpp:331
#10 0x00007feec7e40434 in start_thread (arg=0x7feea8bf3700) at pthread_create.c:334
#11 0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7fee9bda8700 (LWP 7963)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125e568, cond=0x125e590) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125e568) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125e4c8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee9bda8700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fee9b5a7700 (LWP 7964)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125e6c8, cond=0x125e6f0) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125e6c8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125e628) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee9b5a7700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fee9ada6700 (LWP 7965)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125e828, cond=0x125e850) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125e828) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125e788) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee9ada6700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fee9a5a5700 (LWP 7966)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125e988, cond=0x125e9b0) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125e988) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125e8e8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee9a5a5700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fee99da4700 (LWP 7967)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125eae8, cond=0x125eb10) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125eae8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125ea48) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee99da4700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fee995a3700 (LWP 7968)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125ec48, cond=0x125ec70) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125ec48) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125eba8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee995a3700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fee98da2700 (LWP 7969)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125eda8, cond=0x125edd0) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125eda8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125ed08) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee98da2700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fee985a1700 (LWP 7970)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125ef08, cond=0x125ef30) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125ef08) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125ee68) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee985a1700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fee97da0700 (LWP 7971)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125f068, cond=0x125f090) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125f068) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125efc8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee97da0700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fee9759f700 (LWP 7972)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125f1c8, cond=0x125f1f0) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125f1c8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125f128) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee9759f700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fee96d9e700 (LWP 7973)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125f328, cond=0x125f350) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125f328) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125f288) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee96d9e700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fee9659d700 (LWP 7974)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feea1b1a295 in cnd_wait (mtx=0x125f488, cond=0x125f4b0) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:154
#2  pipe_semaphore_wait (sema=0x125f488) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0x125f3e8) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/src/gallium/drivers/llvmpipe/lp_rast.c:779
#4  0x00007feea1b19ffd in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-11.0.6/work/mesa-11.0.6/include/c11/threads_posix.h:87
#5  0x00007feec7e40434 in start_thread (arg=0x7fee9659d700) at pthread_create.c:334
#6  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fee95d9c700 (LWP 7981)):
#0  0x00007feec7b7f0e3 in select () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007feec6478a71 in qt_safe_select (nfds=16, fdread=0x7fee90000a78, fdwrite=0x7fee90000d08, fdexcept=0x7fee90000f98, orig_timeout=<optimized out>) at kernel/qcore_unix.cpp:75
#2  0x00007feec647904d in QEventDispatcherUNIX::select (this=<optimized out>, nfds=<optimized out>, readfds=<optimized out>, writefds=<optimized out>, exceptfds=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_unix.cpp:320
#3  0x00007feec647a1a8 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7fee900008e0, flags=..., flags@entry=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007feec647a627 in QEventDispatcherUNIX::processEvents (this=0x7fee900008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007feec642e149 in QEventLoop::processEvents (this=this@entry=0x7fee95d9bd10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:128
#6  0x00007feec642e553 in QEventLoop::exec (this=this@entry=0x7fee95d9bd10, flags=flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007feec62958eb in QThread::exec (this=this@entry=0x15836e0) at thread/qthread.cpp:503
#8  0x00007feec0fd5e50 in QQmlThreadPrivate::run (this=0x15836e0) at qml/ftw/qqmlthread.cpp:141
#9  0x00007feec6299f68 in QThreadPrivate::start (arg=0x15836e0) at thread/qthread_unix.cpp:331
#10 0x00007feec7e40434 in start_thread (arg=0x7fee95d9c700) at pthread_create.c:334
#11 0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fee87348700 (LWP 7984)):
#0  pthread_cond_wait () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007feec545b57f in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7feec553ce00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007feec545b5e3 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007feec7e40434 in start_thread (arg=0x7fee87348700) at pthread_create.c:334
#4  0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fee87e13700 (LWP 25272)):
#0  0x00007feec7b7f0e3 in select () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007feec6478a71 in qt_safe_select (nfds=11, fdread=0x7fee78000a78, fdwrite=0x7fee78000d08, fdexcept=0x7fee78000f98, orig_timeout=<optimized out>) at kernel/qcore_unix.cpp:75
#2  0x00007feec647904d in QEventDispatcherUNIX::select (this=<optimized out>, nfds=<optimized out>, readfds=<optimized out>, writefds=<optimized out>, exceptfds=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_unix.cpp:320
#3  0x00007feec647a1a8 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7fee780008e0, flags=..., flags@entry=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007feec647a627 in QEventDispatcherUNIX::processEvents (this=0x7fee780008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007feec642e149 in QEventLoop::processEvents (this=this@entry=0x7fee87e12d10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:128
#6  0x00007feec642e553 in QEventLoop::exec (this=this@entry=0x7fee87e12d10, flags=flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007feec62958eb in QThread::exec (this=this@entry=0x2710f70) at thread/qthread.cpp:503
#8  0x00007feec0fd5e50 in QQmlThreadPrivate::run (this=0x2710f70) at qml/ftw/qqmlthread.cpp:141
#9  0x00007feec6299f68 in QThreadPrivate::start (arg=0x2710f70) at thread/qthread_unix.cpp:331
#10 0x00007feec7e40434 in start_thread (arg=0x7fee87e13700) at pthread_create.c:334
#11 0x00007feec7b8650d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7feec828c880 (LWP 7929)):
[KCrash Handler]
#6  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data (this=0x8) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:983
#8  QScreen::d_func (this=0x0) at kernel/qscreen.h:59
#9  QScreen::handle (this=0x0) at kernel/qscreen.cpp:111
#10 0x00007feeb123e25d in QXcbIntegration::createPlatformWindow (this=<optimized out>, window=0x36ff880) at qxcbintegration.cpp:196
#11 0x00007feec6761975 in QWindowPrivate::create (this=0x3c34eb0, recursive=recursive@entry=false) at kernel/qwindow.cpp:392
#12 0x00007feec6761a6a in QWindow::create (this=this@entry=0x36ff880) at kernel/qwindow.cpp:548
#13 0x00007feec6761daf in QWindow::setVisible (this=this@entry=0x36ff880, visible=visible@entry=true) at kernel/qwindow.cpp:477
#14 0x00007feec15b0f0a in QQuickWindowQmlImpl::setVisible (this=0x36ff880, visible=<optimized out>) at items/qquickwindowmodule.cpp:77
#15 0x00007feec161e564 in QQuickWindowQmlImpl::qt_static_metacall (_o=_o@entry=0x36ff880, _c=_c@entry=QMetaObject::WriteProperty, _id=_id@entry=0, _a=_a@entry=0x7fff049a9060) at .moc/moc_qquickwindowmodule_p.cpp:131
#16 0x00007feec161e66d in QQuickWindowQmlImpl::qt_metacall (this=0x36ff880, _c=QMetaObject::WriteProperty, _id=0, _a=0x7fff049a9060) at .moc/moc_qquickwindowmodule_p.cpp:180
#17 0x00007feec643643d in QMetaObject::metacall (object=object@entry=0x36ff880, cl=cl@entry=QMetaObject::WriteProperty, idx=idx@entry=21, argv=argv@entry=0x7fff049a9060) at kernel/qmetaobject.cpp:296
#18 0x00007feec0f51c77 in QQmlPropertyPrivate::write (object=object@entry=0x36ff880, property=..., value=..., context=context@entry=0x1e19080, flags=...) at qml/qqmlproperty.cpp:1308
#19 0x00007feec0f5307f in QQmlPropertyPrivate::writeValueProperty (object=object@entry=0x36ff880, core=..., value=..., context=context@entry=0x1e19080, flags=...) at qml/qqmlproperty.cpp:1237
#20 0x00007feec0f541ba in QQmlPropertyPrivate::writeBinding (object=0x36ff880, core=..., context=0x1e19080, expression=expression@entry=0x35cb8f0, result=..., isUndefined=isUndefined@entry=false, flags=...) at qml/qqmlproperty.cpp:1597
#21 0x00007feec0fc1f5b in QQmlBinding::update (this=0x35cb8d0, flags=...) at qml/qqmlbinding.cpp:199
#22 0x00007feec0fc2286 in QQmlBinding::update (this=<optimized out>) at qml/qqmlbinding_p.h:97
#23 QQmlBinding::expressionChanged (e=<optimized out>) at qml/qqmlbinding.cpp:260
#24 0x00007feec0fbb269 in QQmlJavaScriptExpressionGuard_callback (e=<optimized out>) at qml/qqmljavascriptexpression.cpp:361
#25 0x00007feec0f9cca7 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:94
#26 0x00007feec0f417d4 in QQmlData::signalEmitted (object=0xd74c80, index=3, a=0x0) at qml/qqmlengine.cpp:763
#27 0x00007feec645754b in QMetaObject::activate (sender=sender@entry=0xd74c80, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3599
#28 0x00007feec6457ee1 in QMetaObject::activate (sender=sender@entry=0xd74c80, m=m@entry=0x7feec7a93d00 <KWin::Outline::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3578
#29 0x00007feec77f0e4a in KWin::Outline::activeChanged (this=this@entry=0xd74c80) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5_build/moc_outline.cpp:185
#30 0x00007feec76cd2db in KWin::Outline::show (this=this@entry=0xd74c80) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/outline.cpp:57
#31 0x00007feec76cd30d in KWin::Outline::show (this=0xd74c80, outlineGeometry=...) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/outline.cpp:84
#32 0x00007feec77107c7 in KWin::AbstractClient::setElectricBorderMaximizing (this=this@entry=0x135cde0, maximizing=maximizing@entry=true) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/geometry.cpp:3221
#33 0x00007feec7691e74 in KWin::AbstractClient::checkQuickTilingMaximizationZones (this=this@entry=0x135cde0, xroot=3820, yroot=<optimized out>) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/abstract_client.cpp:1244
#34 0x00007feec771975b in KWin::AbstractClient::handleMoveResize (this=this@entry=0x135cde0, local=..., global=...) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/geometry.cpp:2836
#35 0x00007feec76d3170 in KWin::Client::motionNotifyEvent (this=this@entry=0x135cde0, w=61922655, state=272, x=2887, y=1982, x_root=3820, y_root=2007) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/events.cpp:1346
#36 0x00007feec76d4237 in KWin::Client::windowEvent (this=0x135cde0, e=e@entry=0x7feeac001b80) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/events.cpp:698
#37 0x00007feec76d4e0d in KWin::Workspace::workspaceEvent (this=0xd3c6e0, e=e@entry=0x7feeac001b80) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/events.cpp:369
#38 0x00007feec76c479a in KWin::XcbEventFilter::nativeEventFilter (this=<optimized out>, eventType=..., message=0x7feeac001b80, result=<optimized out>) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/main.cpp:510
#39 0x00007feec642d69c in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7feeac001b80, result=result@entry=0x7fff049ab1b8) at kernel/qabstracteventdispatcher.cpp:460
#40 0x00007feeb123b506 in QXcbConnection::handleXcbEvent (this=this@entry=0xc32790, event=event@entry=0x7feeac001b80) at qxcbconnection.cpp:1020
#41 0x00007feeb123c0a1 in QXcbConnection::processXcbEvents (this=0xc32790) at qxcbconnection.cpp:1502
#42 0x00007feeb1266ae3 in QXcbConnection::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qxcbconnection.cpp:187
#43 0x00007feec6454ae8 in QMetaCallEvent::placeMetaCall (this=0x7feeac001fb0, object=0xc32790) at kernel/qobject.cpp:486
#44 0x00007feec64582f8 in QObject::event (this=0xc32790, e=<optimized out>) at kernel/qobject.cpp:1239
#45 0x00007feeb123c8ea in QXcbConnection::event (this=<optimized out>, e=0x7feeac001fb0) at qxcbconnection.cpp:2099
#46 0x00007feec6c5a736 in QApplicationPrivate::notify_helper (this=this@entry=0xc2c4f0, receiver=receiver@entry=0xc32790, e=e@entry=0x7feeac001fb0) at kernel/qapplication.cpp:3716
#47 0x00007feec6c5f60e in QApplication::notify (this=this@entry=0x7fff049ab8a0, receiver=receiver@entry=0xc32790, e=e@entry=0x7feeac001fb0) at kernel/qapplication.cpp:3160
#48 0x00007feec76c7201 in KWin::Application::notify (this=0x7fff049ab8a0, o=0xc32790, e=0x7feeac001fb0) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/main.cpp:246
#49 0x00007feec642ee2d in QCoreApplication::notifyInternal (this=0x7fff049ab8a0, receiver=receiver@entry=0xc32790, event=event@entry=0x7feeac001fb0) at kernel/qcoreapplication.cpp:965
#50 0x00007feec64336e0 in QCoreApplication::sendEvent (event=0x7feeac001fb0, receiver=0xc32790) at kernel/qcoreapplication.h:224
#51 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xc1d1d0) at kernel/qcoreapplication.cpp:1593
#52 0x00007feec647a554 in QEventDispatcherUNIX::processEvents (this=0xc66690, flags=..., flags@entry=...) at kernel/qeventdispatcher_unix.cpp:579
#53 0x00007feeb129a4cd in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#54 0x00007feec642e149 in QEventLoop::processEvents (this=this@entry=0x7fff049ab7b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:128
#55 0x00007feec642e553 in QEventLoop::exec (this=this@entry=0x7fff049ab7b0, flags=flags@entry=...) at kernel/qeventloop.cpp:204
#56 0x00007feec6434e08 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#57 0x00007feec6752750 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1527
#58 0x00007feec6c55e65 in QApplication::exec () at kernel/qapplication.cpp:2976
#59 0x00007feec805a828 in kdemain (argc=3, argv=0x7fff049aba18) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5/main_x11.cpp:308
#60 0x000000000040092d in main (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-plasma/kwin-5.5.5/work/kwin-5.5.5_build/kwin_x11_dummy.cpp:3

Reported using DrKonqi
Comment 1 Thomas Lübking 2016-06-16 05:09:04 UTC 
Qt bug, here induced by QML as used by the quick tiling indicators.
Affected every Qt 5.5 version, 5.6.0 has a bug in the fix, so update to 5.6.1 to get rid of at least this Qt bug.

*** This bug has been marked as a duplicate of bug 341497 ***