Bug 402943

Summary: KWin crashes when closing program and switching virtual desktop at the same time
Product: [Plasma] kwin Reporter: Lukas Bartl <lukibartl>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version: 5.14.4   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Lukas Bartl 2019-01-06 21:06:43 UTC
Application: kwin_x11 (5.14.4)

Qt Version: 5.12.0
Frameworks Version: 5.53.0
Operating System: Linux 4.20.0-arch1-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
I closed "Keybase" und at the same time switched the virtual desktop. KWin crashed and restarted. I can reproduce this issue sometimes.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faf0ad2a840 (LWP 5650))]

Thread 6 (Thread 0x7faeeebde700 (LWP 5667)):
#0  0x00007faf116d6afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faf123d328c in  () at /usr/lib/libQt5Script.so.5
#2  0x00007faf123d32a9 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007faf116d0a9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faf13f56b23 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7faeefcb4700 (LWP 5664)):
#0  0x00007faf116d6afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faf00367c24 in  () at /usr/lib/dri/i965_dri.so
#2  0x00007faf00367948 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007faf116d0a9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faf13f56b23 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7faf02c5f700 (LWP 5662)):
#0  0x00007faf13f4bd16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007faf12af746b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf12af894b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf12aa458c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faf128e85c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007faf10e94b89 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007faf128e99cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007faf116d0a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007faf13f56b23 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7faf08e54700 (LWP 5654)):
#0  0x00007faf13f4bd16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007faf12af746b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf12af894b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf12aa458c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faf128e85c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007faf10901ba6 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007faf128e99cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007faf116d0a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007faf13f56b23 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7faf0a3cf700 (LWP 5653)):
#0  0x00007faf13f4bc21 in poll () at /usr/lib/libc.so.6
#1  0x00007faf1280d630 in  () at /usr/lib/libxcb.so.1
#2  0x00007faf1280f2db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007faf0a8ee96b in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007faf128e99cc in  () at /usr/lib/libQt5Core.so.5
#5  0x00007faf116d0a9d in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007faf13f56b23 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7faf0ad2a840 (LWP 5650)):
[KCrash Handler]
#6  0x00007faf13e92d7f in raise () at /usr/lib/libc.so.6
#7  0x00007faf13e7d672 in abort () at /usr/lib/libc.so.6
#8  0x00007faf128af7fc in  () at /usr/lib/libQt5Core.so.5
#9  0x00007faf1264eeda in KWin::WindowQuad::makeSubQuad(double, double, double, double) const () at /usr/lib/libkwineffects.so.11
#10 0x00007faf0807553d in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#11 0x00007faf08075698 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#12 0x00007faf0807f223 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#13 0x00007faf0807f369 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#14 0x00007faf13cd756c in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#15 0x00007faf125e5266 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#16 0x00007faf13cd7504 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#17 0x00007faf1255261a in  () at /usr/lib/libkwin4_effect_builtins.so.1
#18 0x00007faf13cd7504 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#19 0x00007faf1264b51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#20 0x00007faf13cd7504 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#21 0x00007faf1264b51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#22 0x00007faf13cd7504 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#23 0x00007faf1264b51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#24 0x00007faf13cd7504 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#25 0x00007faf13cc33fd in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#26 0x00007faf13cd7395 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#27 0x00007faf1264b3ad in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#28 0x00007faf13cd7334 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#29 0x00007faf1264b3ad in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#30 0x00007faf13cd7334 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#31 0x00007faf125d29de in  () at /usr/lib/libkwin4_effect_builtins.so.1
#32 0x00007faf13cd7334 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#33 0x00007faf12568d30 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#34 0x00007faf13cd7334 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#35 0x00007faf12658cec in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#36 0x00007faf13cd7334 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#37 0x00007faf13cc99b3 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () at /usr/lib/libkwin.so.5
#38 0x00007faf13cc7900 in KWin::Scene::paintGenericScreen(int, KWin::ScreenPaintData) () at /usr/lib/libkwin.so.5
#39 0x00007faf0807f10e in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#40 0x00007faf13cc8ee8 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#41 0x00007faf13cd70e7 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#42 0x00007faf1264b302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#43 0x00007faf13cd708e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#44 0x00007faf1264b302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#45 0x00007faf13cd708e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#46 0x00007faf1264b302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#47 0x00007faf13cd708e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#48 0x00007faf1256ba21 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#49 0x00007faf1256bd1f in  () at /usr/lib/libkwin4_effect_builtins.so.1
#50 0x00007faf13cd708e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#51 0x00007faf1264b302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#52 0x00007faf13cd708e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#53 0x00007faf13cc8bcb in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /usr/lib/libkwin.so.5
#54 0x00007faf08079477 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#55 0x00007faf13cba4fe in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#56 0x00007faf12ad0b1b in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#57 0x00007faf1346de34 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#58 0x00007faf13475671 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#59 0x00007faf12aa58f9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#60 0x00007faf12afa955 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#61 0x00007faf12af8a9e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#62 0x00007faf0a8efd4f in  () at /usr/lib/libQt5XcbQpa.so.5
#63 0x00007faf12aa458c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#64 0x00007faf12aac896 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#65 0x00007faf14028b26 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#66 0x00007faf13e7f223 in __libc_start_main () at /usr/lib/libc.so.6
#67 0x000055f5e941605e in _start ()
[Inferior 1 (process 5650) detached]

Reported using DrKonqi
Comment 1 Vlad Zahorodnii 2019-01-06 21:09:19 UTC
Please post output of
    qdbus org.kde.KWin /KWin supportInformation
Comment 2 Lukas Bartl 2019-01-06 22:28:57 UTC
KWin-Unterstützungsinformationen:
Benutzen Sie die folgenden Informationen, wenn Sie nach Unterstützung fragen, z. B. auf http://forum.kde.org.
Sie enthalten Informationen über die momentan laufende Instanz, welche Optionen verwendet werden,
welcher OpenGL-Treiber verwendet wird und welche Effekte laufen.
Bitte geben Sie die unten stehenden Informationen bei einem Pastebin-Dienst wie http://paste.kde.org ein, anstatt sie direkt in die Hilfediskussionen zu schreiben.

==========================

Version
=======
KWin version: 5.14.4
Qt Version: 5.12.0
Qt compile version: 5.12.0
XCB compile version: 1.13.1

Operation Mode: X11 only

Build Options
=============
KWIN_BUILD_DECORATIONS: yes
KWIN_BUILD_TABBOX: yes
KWIN_BUILD_ACTIVITIES: yes
HAVE_DRM: yes
HAVE_GBM: yes
HAVE_X11_XCB: yes
HAVE_EPOXY_GLX: yes
HAVE_WAYLAND_EGL: yes

X11
===
Vendor: The X.Org Foundation
Vendor Release: 12003000
Protocol Version/Revision: 11/0
SHAPE: yes; Version: 0x11
RANDR: yes; Version: 0x14
DAMAGE: yes; Version: 0x11
Composite: yes; Version: 0x4
RENDER: yes; Version: 0xb
XFIXES: yes; Version: 0x50
SYNC: yes; Version: 0x31
GLX: yes; Version: 0x0

Decoration
==========
Plugin: org.kde.breeze
Theme: 
Blur: 0
onAllDesktopsAvailable: true
alphaChannelSupported: true
closeOnDoubleClickOnMenu: false
decorationButtonsLeft: 0, 2
decorationButtonsRight: 6, 3, 4, 5
borderSize: 3
gridUnit: 12
font: DejaVu Serif Condensed,11,-1,5,50,0,0,0,0,0,Book
smallSpacing: 3
largeSpacing: 12

Platform
==========
Name: KWin::X11StandalonePlatform

Options
=======
focusPolicy: 0
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 0
delayFocusInterval: 0
shadeHover: false
shadeHoverInterval: 250
separateScreenFocus: false
placement: 4
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
rollOverDesktops: true
focusStealingPreventionLevel: 1
legacyFullscreenSupport: false
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5015
operationMaxButtonRightClick: 5014
commandActiveTitlebar1: 0
commandActiveTitlebar2: 30
commandActiveTitlebar3: 2
commandInactiveTitlebar1: 4
commandInactiveTitlebar2: 30
commandInactiveTitlebar3: 2
commandWindow1: 7
commandWindow2: 8
commandWindow3: 8
commandWindowWheel: 31
commandAll1: 10
commandAll2: 3
commandAll3: 14
keyCmdAllModKey: 16777251
showGeometryTip: false
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderCornerRatio: 0.25
borderlessMaximizedWindows: false
killPingTimeout: 5000
hideUtilityWindowsForInactive: true
inactiveTabsSkipTaskbar: false
autogroupSimilarWindows: false
autogroupInForeground: true
compositingMode: 1
useCompositing: true
compositingInitialized: true
hiddenPreviews: 1
glSmoothScale: 2
xrenderSmoothScale: false
maxFpsInterval: 16666666
refreshRate: 0
vBlankTime: 6000000
glStrictBinding: true
glStrictBindingFollowsDriver: true
glCoreProfile: true
glPreferBufferSwap: 101
glPlatformInterface: 1
windowsBlockCompositing: true

Screen Edges
============
desktopSwitching: false
desktopSwitchingMovingClients: false
cursorPushBackDistance: 1x1
timeThreshold: 150
reActivateThreshold: 350
actionTopLeft: 0
actionTop: 0
actionTopRight: 0
actionRight: 0
actionBottomRight: 0
actionBottom: 0
actionBottomLeft: 0
actionLeft: 0

Screens
=======
Multi-Head: no
Active screen follows mouse:  no
Number of Screens: 1

Screen 0:
---------
Name: eDP-1
Geometry: 0,0,1920x1080
Scale: 1
Refresh Rate: 59.9339


Compositing
===========
Compositing is active
Compositing Type: OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 620 (Kaby Lake GT2) 
OpenGL version string: 4.5 (Core Profile) Mesa 18.3.1
OpenGL platform interface: GLX
OpenGL shading language version string: 4.50
Driver: Intel
GPU class: Unknown
OpenGL version: 4.5
GLSL version: 4.50
Mesa version: 18.3.1
X server version: 1.20.3
Linux kernel version: 4.20
Direct rendering: Requires strict binding: yes
GLSL shaders:  yes
Texture NPOT support:  yes
Virtual Machine:  no
OpenGL 2 Shaders are used
Painting blocks for vertical retrace:  no

Loaded Effects:
---------------
trackmouse
mousemark
mouseclick
lookingglass
kwin4_effect_translucency
kwin4_effect_morphingpopups
kwin4_effect_maximize
kwin4_effect_logout
kwin4_effect_login
dimscreen
kwin4_effect_frozenapp
kwin4_effect_fade
kwin4_effect_eyeonscreen
kwin4_effect_dialogparent
slidingpopups
slideback
screenshot
magiclamp
glide
desktopgrid
cubeslide
cube
colorpicker
sheet
wobblywindows
presentwindows
highlightwindow
fallapart
blur
contrast
startupfeedback
screenedge
kscreen

Currently Active Effects:
-------------------------
blur
contrast

Effect Settings:
----------------
trackmouse:
modifiers: 335544320
mousePolling: true

mousemark:
width: 3
color: #ff0000

mouseclick:
color1: #ff0000
color2: #00ff00
color3: #0000ff
lineWidth: 1
ringLife: 300
ringSize: 20
ringCount: 2
showText: true
font: Noto Sans,11,-1,5,50,0,0,0,0,0,Regular
enabled: false

lookingglass:
initialRadius: 200

kwin4_effect_translucency:

kwin4_effect_morphingpopups:

kwin4_effect_maximize:

kwin4_effect_logout:

kwin4_effect_login:

dimscreen:

kwin4_effect_frozenapp:

kwin4_effect_fade:

kwin4_effect_eyeonscreen:

kwin4_effect_dialogparent:

slidingpopups:
slideInDuration: 300
slideOutDuration: 500

slideback:

screenshot:

magiclamp:

glide:
duration: 320
inRotationEdge: 0
inRotationAngle: 3
inDistance: 30
inOpacity: 0.4
outRotationEdge: 2
outRotationAngle: 3
outDistance: 30
outOpacity: 0

desktopgrid:
zoomDuration: 600
border: 10
desktopNameAlignment: 0
layoutMode: 0
customLayoutRows: 2
usePresentWindows: true

cubeslide:
rotationDuration: 1000
dontSlidePanels: true
dontSlideStickyWindows: false
usePagerLayout: true
useWindowMoving: false

cube:
cubeOpacity: 0.800000011920929
opacityDesktopOnly: false
displayDesktopName: true
reflection: true
rotationDuration: 1000
backgroundColor: #000000
capColor: #eff0f1
paintCaps: true
closeOnMouseRelease: false
zPosition: 100
useForTabBox: false
invertKeys: false
invertMouse: false
capDeformationFactor: 0
useZOrdering: false
texturedCaps: true

colorpicker:

sheet:
duration: 1000

wobblywindows:
stiffness: 0.01
drag: 0.97
moveFactor: 0.25
xTesselation: 20
yTesselation: 20
minVelocity: 0
maxVelocity: 1000
stopVelocity: 0.5
minAcceleration: 0
maxAcceleration: 1000
stopAcceleration: 0.5
moveEffectEnabled: true
openEffectEnabled: false
closeEffectEnabled: false
moveWobble: true
resizeWobble: true

presentwindows:
layoutMode: 0
showCaptions: true
showIcons: true
doNotCloseWindows: false
ignoreMinimized: false
accuracy: 20
fillGaps: true
fadeDuration: 300
showPanel: false
leftButtonWindow: 1
rightButtonWindow: 2
middleButtonWindow: 0
leftButtonDesktop: 2
middleButtonDesktop: 0
rightButtonDesktop: 0

highlightwindow:

fallapart:
blockSize: 40

blur:

contrast:

startupfeedback:
type: 1

screenedge:

kscreen:
Comment 3 Lukas Bartl 2019-01-06 22:31:07 UTC
KWin crashed again, this time with kate. I closed kate and switched virtual desktop to post the output here und KWin crashed again. The Backtrace is the same.
Comment 4 Lukas Bartl 2019-01-06 22:34:48 UTC
It's not a real problem, because KWin starts again immediatly. But it's still a bug, so i reported it.
Comment 5 Martin Flöser 2019-01-07 05:20:45 UTC
Opening as debug information is provided.
Comment 6 Vlad Zahorodnii 2019-01-07 10:23:15 UTC
If you disable the fall apart effect, can you reproduce the crash?
Comment 7 Lukas Bartl 2019-01-07 12:33:57 UTC
No, I cannot reproduce the crash without the fallapart effect.
The Crash happens during the fallapart effect, when switching virtual desktop.
Comment 8 Vlad Zahorodnii 2019-01-07 12:38:17 UTC

*** This bug has been marked as a duplicate of bug 368847 ***