Bug 418068 - KWin crashes when switching to another text VT and back
Summary: KWin crashes when switching to another text VT and back
Status: RESOLVED DUPLICATE of bug 372305
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: 5.17.5
Platform: Compiled Sources Linux
: NOR crash
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: drkonqi
Depends on:
Blocks:
 
Reported: 2020-02-23 02:21 UTC by Konstantin Baranov
Modified: 2020-03-23 15:48 UTC (History)
0 users

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Latest Commit:
Version Fixed In:

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Description Konstantin Baranov 2020-02-23 02:21:25 UTC 
Application: kwin_x11 (5.17.5)
 (Compiled from sources)
Qt Version: 5.13.2
Frameworks Version: 5.64.0
Operating System: Linux 4.19.104-gentoo x86_64
Distribution: "Gentoo Base System release 2.6"

-- Information about the crash:
What I was doing when the application crashed:
- Have KDE running on vt1, screen unlocked
- Switch to vt2, see text login prompt
- Wait a few seconds, switch back
- Observe KWin crash notification

GPU is NVIDIA with proprietary drivers.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
29	  return SYSCALL_CANCEL (poll, fds, nfds, timeout);
[Current thread is 1 (Thread 0x7f6b76cf7880 (LWP 1332))]

Thread 7 (Thread 0x7f6b6cdde700 (LWP 62562)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x55db0760df94) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55db0760df40, cond=0x55db0760df68) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55db0760df68, mutex=0x55db0760df40) at pthread_cond_wait.c:655
#3  0x00007f6b7cda4edb in QWaitConditionPrivate::wait (deadline=..., this=0x55db0760df40) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x55db07be9ef0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f6b7cda4f49 in QWaitCondition::wait (this=this@entry=0x55db07be9ef8, mutex=mutex@entry=0x55db07be9ef0, time=time@entry=18446744073709551615) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#6  0x00007f6b7be0bbf9 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55db07be9ee8) at scenegraph/qsgthreadedrenderloop.cpp:245
#7  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55db07be9e70) at scenegraph/qsgthreadedrenderloop.cpp:710
#8  0x00007f6b7be0be69 in QSGRenderThread::run (this=0x55db07be9e70) at scenegraph/qsgthreadedrenderloop.cpp:739
#9  0x00007f6b7cd9fb16 in QThreadPrivate::start (arg=0x55db07be9e70) at thread/qthread_unix.cpp:360
#10 0x00007f6b7c2d3497 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f6b7e3923cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f6b6ffff700 (LWP 4075)):
#0  0x00007f6b7e386646 in __GI_ppoll (fds=fds@entry=0x7f6b64012388, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f6b7cf7a149 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6b64012388) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6b64012388) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7f6b64012388, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#5  0x00007f6b7cf7b198 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f6b7cf2bfbb in QEventLoop::exec (this=this@entry=0x7f6b6fffed40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f6b7cd9ebd1 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f6b7cd9fb16 in QThreadPrivate::start (arg=0x55db075e9610) at thread/qthread_unix.cpp:360
#9  0x00007f6b7c2d3497 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007f6b7e3923cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f6b6e5bd700 (LWP 1550)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x7f6b7c8f4ef8 <QTWTF::pageheap_memory+57592>) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f6b7c8f4ea8 <QTWTF::pageheap_memory+57512>, cond=0x7f6b7c8f4ed0 <QTWTF::pageheap_memory+57552>) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f6b7c8f4ed0 <QTWTF::pageheap_memory+57552>, mutex=0x7f6b7c8f4ea8 <QTWTF::pageheap_memory+57512>) at pthread_cond_wait.c:655
#3  0x00007f6b7c80c0fa in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f6b7c8e6e00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x00007f6b7c80c119 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x00007f6b7c2d3497 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f6b7e3923cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f6b6f7fe700 (LWP 1426)):
#0  0x00007f6b7e386646 in __GI_ppoll (fds=fds@entry=0x7f6b5c000d68, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f6b7cf7a149 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6b5c000d68) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6b5c000d68) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7f6b5c000d68, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#5  0x00007f6b7cf7b198 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f6b7cf2bfbb in QEventLoop::exec (this=this@entry=0x7f6b6f7fdd20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f6b7cd9ebd1 in QThread::exec (this=this@entry=0x7f6b70003a30) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f6b7ba7ddc5 in QQmlThreadPrivate::run (this=0x7f6b70003a30) at qml/ftw/qqmlthread.cpp:152
#9  0x00007f6b7cd9fb16 in QThreadPrivate::start (arg=0x7f6b70003a30) at thread/qthread_unix.cpp:360
#10 0x00007f6b7c2d3497 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f6b7e3923cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f6b7596e700 (LWP 1358)):
#0  0x00007f6b7e386646 in __GI_ppoll (fds=fds@entry=0x7f6b6800b078, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f6b7cf7a149 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6b6800b078) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f6b6800b078) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7f6b6800b078, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#5  0x00007f6b7cf7b198 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007f6b7cf2bfbb in QEventLoop::exec (this=this@entry=0x7f6b7596dd00, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f6b7cd9ebd1 in QThread::exec (this=this@entry=0x7f6b7b4aad80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f6b7b42b467 in QDBusConnectionManager::run (this=0x7f6b7b4aad80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#9  0x00007f6b7cd9fb16 in QThreadPrivate::start (arg=0x7f6b7b4aad80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:360
#10 0x00007f6b7c2d3497 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f6b7e3923cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f6b76632700 (LWP 1354)):
#0  0x00007f6b7e386553 in __GI___poll (fds=fds@entry=0x7f6b76631c48, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6b7ccc4cb7 in poll (__timeout=-1, __nfds=1, __fds=0x7f6b76631c48) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x55db071a4f80, cond=cond@entry=0x55db071a4fc0, vector=vector@entry=0x0, count=count@entry=0x0) at /usr/src/debug/x11-libs/libxcb-1.13.1/libxcb-1.13.1/src/xcb_conn.c:479
#3  0x00007f6b7ccc67da in xcb_wait_for_event (c=c@entry=0x55db071a4f80) at /usr/src/debug/x11-libs/libxcb-1.13.1/libxcb-1.13.1/src/xcb_in.c:697
#4  0x00007f6b76735ee0 in QXcbEventQueue::run (this=0x55db071b2640) at qxcbeventqueue.cpp:228
#5  0x00007f6b7cd9fb16 in QThreadPrivate::start (arg=0x55db071b2640) at thread/qthread_unix.cpp:360
#6  0x00007f6b7c2d3497 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007f6b7e3923cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f6b76cf7880 (LWP 1332)):
[KCrash Handler]
#7  0x00007f6b7c9ca357 in KWin::ContrastEffect::uploadRegion (this=this@entry=0x55db073565b0, map=@0x7ffca23f85e8: 0x7f6b6cfd13d0, region=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects/backgroundcontrast/contrast.cpp:325
#8  0x00007f6b7c9ca405 in KWin::ContrastEffect::uploadGeometry (this=this@entry=0x55db073565b0, vbo=vbo@entry=0x55db0758e720, region=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects/backgroundcontrast/contrast.cpp:343
#9  0x00007f6b7c9cc110 in KWin::ContrastEffect::doContrast (this=this@entry=0x55db073565b0, w=w@entry=0x55db074a19e0, shape=..., screen=..., opacity=1, screenProjection=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects/backgroundcontrast/contrast.cpp:479
#10 0x00007f6b7c9cc9b9 in KWin::ContrastEffect::drawWindow (this=this@entry=0x55db073565b0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects/backgroundcontrast/contrast.cpp:462
#11 0x00007f6b7e092473 in KWin::EffectsHandlerImpl::drawWindow (this=this@entry=0x55db0734ede0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:473
#12 0x00007f6b7c939ead in KWin::BlurEffect::drawWindow (this=this@entry=0x55db0751cb00, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects/blur/blur.cpp:616
#13 0x00007f6b7e092473 in KWin::EffectsHandlerImpl::drawWindow (this=this@entry=0x55db0734ede0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:473
#14 0x00007f6b7ca3545d in KWin::Effect::drawWindow (this=this@entry=0x55db076c51b0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwineffects.cpp:615
#15 0x00007f6b7e092473 in KWin::EffectsHandlerImpl::drawWindow (this=this@entry=0x55db0734ede0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:473
#16 0x00007f6b7e1223ed in KWin::Scene::finalPaintWindow (this=this@entry=0x55db074c1160, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/scene.cpp:612
#17 0x00007f6b7e092318 in KWin::EffectsHandlerImpl::paintWindow (this=this@entry=0x55db0734ede0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:439
#18 0x00007f6b7ca3532d in KWin::Effect::paintWindow (this=this@entry=0x55db073565b0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwineffects.cpp:585
#19 0x00007f6b7e0922d3 in KWin::EffectsHandlerImpl::paintWindow (this=this@entry=0x55db0734ede0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:436
#20 0x00007f6b7ca3532d in KWin::Effect::paintWindow (this=this@entry=0x55db0751cb00, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwineffects.cpp:585
#21 0x00007f6b7e0922d3 in KWin::EffectsHandlerImpl::paintWindow (this=this@entry=0x55db0734ede0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:436
#22 0x00007f6b7ca2dee1 in KWin::AnimationEffect::paintWindow (this=this@entry=0x55db076c51b0, w=w@entry=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwinanimationeffect.cpp:731
#23 0x00007f6b7e0922d3 in KWin::EffectsHandlerImpl::paintWindow (this=this@entry=0x55db0734ede0, w=0x55db074a19e0, mask=mask@entry=2, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:436
#24 0x00007f6b7e128687 in KWin::Scene::paintWindow (this=this@entry=0x55db074c1160, w=0x55db073ff7a0, mask=2, region=..., quads=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/scene.cpp:484
#25 0x00007f6b7e125304 in KWin::Scene::paintSimpleScreen (this=this@entry=0x55db074c1160, orig_mask=orig_mask@entry=0, region=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwineffects.h:2522
#26 0x00007f6b741d5979 in KWin::SceneOpenGL2::paintSimpleScreen (this=this@entry=0x55db074c1160, mask=mask@entry=0, region=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/plugins/scenes/opengl/scene_opengl.cpp:1015
#27 0x00007f6b7e127ce0 in KWin::Scene::finalPaintScreen (this=this@entry=0x55db074c1160, mask=mask@entry=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/scene.cpp:199
#28 0x00007f6b7e0920b4 in KWin::EffectsHandlerImpl::paintScreen (this=this@entry=0x55db0734ede0, mask=mask@entry=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:396
#29 0x00007f6b7ca352a1 in KWin::Effect::paintScreen (this=this@entry=0x55db073565b0, mask=mask@entry=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwineffects.cpp:570
#30 0x00007f6b7e09206f in KWin::EffectsHandlerImpl::paintScreen (this=this@entry=0x55db0734ede0, mask=mask@entry=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:393
#31 0x00007f6b7ca352a1 in KWin::Effect::paintScreen (this=this@entry=0x55db0751cb00, mask=mask@entry=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwineffects.cpp:570
#32 0x00007f6b7e09206f in KWin::EffectsHandlerImpl::paintScreen (this=this@entry=0x55db0734ede0, mask=mask@entry=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:393
#33 0x00007f6b7ca352a1 in KWin::Effect::paintScreen (this=this@entry=0x55db076c51b0, mask=mask@entry=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/libkwineffects/kwineffects.cpp:570
#34 0x00007f6b7e09206f in KWin::EffectsHandlerImpl::paintScreen (this=this@entry=0x55db0734ede0, mask=0, region=..., data=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/effects.cpp:393
#35 0x00007f6b7e1279e3 in KWin::Scene::paintScreen (this=this@entry=0x55db074c1160, mask=mask@entry=0x7ffca23f9430, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7ffca23f9410, validRegion=validRegion@entry=0x7ffca23f9418, projection=..., outputGeometry=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/scene.cpp:149
#36 0x00007f6b741dd525 in KWin::SceneOpenGL::paint (this=this@entry=0x55db074c1160, damage=..., toplevels=...) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/plugins/scenes/opengl/scene_opengl.h:122
#37 0x00007f6b7e05a801 in KWin::Compositor::performCompositing (this=0x7f6b68008c20) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/composite.cpp:692
#38 0x00007f6b7cf55b65 in QObject::event (this=<optimized out>, e=<optimized out>) at kernel/qobject.cpp:1282
#39 0x00007f6b7d867602 in QApplicationPrivate::notify_helper (this=this@entry=0x55db071990b0, receiver=receiver@entry=0x7f6b68008c20, e=e@entry=0x7ffca23f97f0) at kernel/qapplication.cpp:3703
#40 0x00007f6b7d870670 in QApplication::notify (this=0x7ffca23f9a30, receiver=0x7f6b68008c20, e=0x7ffca23f97f0) at kernel/qapplication.cpp:3449
#41 0x00007f6b7cf2cfdf in QCoreApplication::notifyInternal2 (receiver=0x7f6b68008c20, event=0x7ffca23f97f0) at kernel/qcoreapplication.cpp:1095
#42 0x00007f6b7cf7cc7b in QTimerInfoList::activateTimers (this=this@entry=0x55db071ee010) at kernel/qtimerinfo_unix.cpp:643
#43 0x00007f6b7cf7a51c in QEventDispatcherUNIXPrivate::activateTimers (this=this@entry=0x55db071edf70) at kernel/qeventdispatcher_unix.cpp:249
#44 0x00007f6b7cf7b2ca in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:514
#45 0x00007f6b7673713e in QXcbUnixEventDispatcher::processEvents (this=0x55db071e7540, flags=...) at qxcbeventdispatcher.cpp:60
#46 0x00007f6b7cf2bfbb in QEventLoop::exec (this=this@entry=0x7ffca23f9950, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#47 0x00007f6b7cf3376e in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#48 0x00007f6b7e465964 in kdemain (argc=<optimized out>, argv=0x7ffca23f9bc8) at /usr/src/debug/kde-plasma/kwin-5.17.5/kwin-5.17.5/main_x11.cpp:474
#49 0x00007f6b7e2b0f1b in __libc_start_main (main=0x55db06cda060 <main>, argc=1, argv=0x7ffca23f9bc8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffca23f9bb8) at ../csu/libc-start.c:308
#50 0x000055db06cda09a in _start ()
[Inferior 1 (process 1332) detached]

Possible duplicates by query: bug 416498, bug 416472, bug 412911, bug 411409, bug 409900.

Reported using DrKonqi
Comment 1 Christoph Feck 2020-03-23 15:48:38 UTC 

*** This bug has been marked as a duplicate of bug 372305 ***