Bug 458234 - Kwin crashes while using task switcher
Summary: Kwin crashes while using task switcher
Status: RESOLVED DUPLICATE of bug 451612
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: 5.25.4
Platform: Fedora RPMs Linux
: NOR crash
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-08-24 07:08 UTC by Emanuele Spirito
Modified: 2022-09-01 13:47 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed In:

Attachments
Crash log made by Dr Konqui (2.44 KB, text/vnd.kde.kcrash-report)
2022-08-24 07:09 UTC, Emanuele Spirito 		Details
Another crash log (13.05 KB, text/vnd.kde.kcrash-report)
2022-08-24 12:00 UTC, Emanuele Spirito 		Details
New crash information added by DrKonqi (2.88 KB, text/plain)
2022-09-01 13:47 UTC, Diaa Sami 		Details
View All Add an attachment

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Description Emanuele Spirito 2022-08-24 07:08:17 UTC 
SUMMARY
If I have at least three windows and I use task switcher by the shortcut Alt+Tab then Kwin crashes. It crashes several times if I continue to use that shortcut. 

STEPS TO REPRODUCE
1. open at least three windows
2. use task switcher (i.e. Alt+Tab)

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 35
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.2
Kernel Version: 5.18.18-100.fc35.x86_64 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-1065G7 CPU @ 1.30GHz
Memory: 7.4 GiB of RAM
Graphics Processor: Mesa Intel® Iris® Plus Graphics
Manufacturer: Dell Inc.
Product Name: Inspiron 15 5501

ADDITIONAL INFORMATION:
Application: KWin (kwin_x11), signal: Aborted

[KCrash Handler]
#4  0x00007fb40d18556c in __pthread_kill_implementation () at /lib64/libc.so.6
#5  0x00007fb40d138d16 in raise () at /lib64/libc.so.6
#6  0x00007fb40d10c7f3 in abort () at /lib64/libc.so.6
#7  0x00007fb3f88fd712 in blorp_update_clear_color.part[cold] () at /usr/lib64/dri/iris_dri.so
#8  0x00007fb3f954dce9 in iris_fence_flush () at /usr/lib64/dri/iris_dri.so
#9  0x00007fb3f8ae2479 in fence_sync () at /usr/lib64/dri/iris_dri.so
#10 0x00007fb40f54f833 in KWin::WindowThumbnailItem::updateOffscreenTexture() () at /lib64/libkwin.so.5
#11 0x00007fb40e58d7d9 in void doActivate<false>(QObject*, int, void**) () at /lib64/libQt5Core.so.5
#12 0x00007fb40f52f784 in KWin::Scene::prePaint(KWin::Output*) () at /lib64/libkwin.so.5
#13 0x00007fb40f482c63 in KWin::Compositor::prePaintPass(KWin::RenderLayer*) () at /lib64/libkwin.so.5
#14 0x00007fb40f484fa5 in KWin::Compositor::composite(KWin::RenderLoop*) () at /lib64/libkwin.so.5
#15 0x00007fb40f485a45 in KWin::X11Compositor::composite(KWin::RenderLoop*) () at /lib64/libkwin.so.5
#16 0x00007fb40e58d7d9 in void doActivate<false>(QObject*, int, void**) () at /lib64/libQt5Core.so.5
#17 0x00007fb40f449f46 in KWin::RenderLoop::frameRequested(KWin::RenderLoop*) () at /lib64/libkwin.so.5
#18 0x00007fb40f51cae7 in KWin::RenderLoopPrivate::dispatch() () at /lib64/libkwin.so.5
#19 0x00007fb40e58d7d9 in void doActivate<false>(QObject*, int, void**) () at /lib64/libQt5Core.so.5
#20 0x00007fb40e590a7e in QTimer::timeout(QTimer::QPrivateSignal) () at /lib64/libQt5Core.so.5
#21 0x00007fb40e5842cf in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#22 0x00007fb40d8e0443 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#23 0x00007fb40e559be8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#24 0x00007fb40e5aa283 in QTimerInfoList::activateTimers() () at /lib64/libQt5Core.so.5
#25 0x00007fb40e5a8850 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#26 0x00007fb3fafe94e2 in QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5
#27 0x00007fb40e5585f2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#28 0x00007fb40e560b34 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#29 0x0000561872c98398 in main ()
[Inferior 1 (process 11852) detached]
Comment 1 Emanuele Spirito 2022-08-24 07:09:21 UTC 
Created attachment 151536 [details]
Crash log made by Dr Konqui

I attach the crash log I've already put inside the previous comment.
Comment 2 Emanuele Spirito 2022-08-24 07:54:50 UTC 
Screenrecord of the bug:

https://drive.google.com/drive/folders/1WcHA81wmIp8M__aBejL-9fZw1n7cjj7-?usp=sharing
Comment 3 Emanuele Spirito 2022-08-24 12:00:27 UTC 
Application: KWin (kwin_x11), signal: Aborted

[KCrash Handler]
#4  0x00007f213e6a256c in __pthread_kill_implementation () at /lib64/libc.so.6
#5  0x00007f213e655d16 in raise () at /lib64/libc.so.6
#6  0x00007f213e6297f3 in abort () at /lib64/libc.so.6
#7  0x00007f2129e1a712 in blorp_update_clear_color.part[cold] () at /usr/lib64/dri/iris_dri.so
#8  0x00007f212aa6ae19 in iris_fence_flush () at /usr/lib64/dri/iris_dri.so
#9  0x00007f2129e8a60d in st_context_flush () at /usr/lib64/dri/iris_dri.so
#10 0x00007f2129e2b205 in dri_flush () at /usr/lib64/dri/iris_dri.so
#11 0x00007f212b808f34 in loader_dri3_swap_buffers_msc () at /lib64/libGLX_mesa.so.0
#12 0x00007f212b7fc1f5 in dri3_swap_buffers () at /lib64/libGLX_mesa.so.0
#13 0x00007f212b852efa in QGLXContext::swapBuffers(QPlatformSurface*) () at /usr/lib64/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#14 0x00007f213db66604 in QSGRenderThread::syncAndRender(QImage*) () at /lib64/libQt5Quick.so.5
#15 0x00007f213db6aa9d in QSGRenderThread::run() () at /lib64/libQt5Quick.so.5
#16 0x00007f213f8b9546 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#17 0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#18 0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 23 (Thread 0x7f2115dec640 (LWP 10664) "kwin_x11:gdrv0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 22 (Thread 0x7f20ebfff640 (LWP 9838) "QQmlThread"):
#1  0x00007f213fac42a9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f213fac56c4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f213fa755f2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f213f8b834a in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f214069ed7c in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#6  0x00007f213f8b9546 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#8  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 21 (Thread 0x7f20d27fc640 (LWP 9809) "vsync event mon"):
#1  0x00007f213fac42a9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f213fac56c4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f213fa755f2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f213f8b834a in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f213f8b9546 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#6  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#7  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 20 (Thread 0x7f20d2ffd640 (LWP 9808) "kwin_x11:gdrv0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 19 (Thread 0x7f20d37fe640 (LWP 9807) "kwin_x11:sh5"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 18 (Thread 0x7f20d3fff640 (LWP 9806) "kwin_x11:sh4"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 17 (Thread 0x7f20e8ff9640 (LWP 9805) "kwin_x11:sh3"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 16 (Thread 0x7f20e97fa640 (LWP 9804) "kwin_x11:sh2"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 15 (Thread 0x7f20e9ffb640 (LWP 9803) "kwin_x11:sh1"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 14 (Thread 0x7f20ea7fc640 (LWP 9802) "kwin_x11:sh0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 13 (Thread 0x7f20eaffd640 (LWP 9801) "kwin_x1:disk$0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 12 (Thread 0x7f20eb7fe640 (LWP 9800) "kwin_x11:gdrv0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 11 (Thread 0x7f21155eb640 (LWP 9795) "QQmlThread"):
#1  0x00007f213fac42a9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f213fac56c4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f213fa755f2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f213f8b834a in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f214069ed7c in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#6  0x00007f213f8b9546 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#8  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 10 (Thread 0x7f2116ffd640 (LWP 9792) "QDBusConnection"):
#1  0x00007f213fac42a9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f213fac56c4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f213fa755f2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f213f8b834a in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f213eb21b7b in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#6  0x00007f213f8b9546 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#8  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 9 (Thread 0x7f21177fe640 (LWP 9791) "kwin_x11:gdrv0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 8 (Thread 0x7f2117fff640 (LWP 9790) "kwin_x11:sh5"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 7 (Thread 0x7f211cf8f640 (LWP 9789) "kwin_x11:sh4"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 6 (Thread 0x7f211d790640 (LWP 9788) "kwin_x11:sh3"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 5 (Thread 0x7f211df91640 (LWP 9787) "kwin_x11:sh2"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 4 (Thread 0x7f21289f0640 (LWP 9786) "kwin_x11:sh1"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 3 (Thread 0x7f21291f1640 (LWP 9785) "kwin_x11:sh0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 2 (Thread 0x7f21299f2640 (LWP 9784) "kwin_x1:disk$0"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f2129e3428b in util_queue_thread_func () at /usr/lib64/dri/iris_dri.so
#3  0x00007f2129e33edb in impl_thrd_routine () at /usr/lib64/dri/iris_dri.so
#4  0x00007f213e6a0822 in start_thread () at /lib64/libc.so.6
#5  0x00007f213e640450 in clone3 () at /lib64/libc.so.6

Thread 1 (Thread 0x7f2139b3b940 (LWP 9779) "kwin_x11"):
#1  0x00007f213e69fbc0 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f213f8bf09b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib64/libQt5Core.so.5
#3  0x00007f213db6f71d in QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window*, bool) () at /lib64/libQt5Quick.so.5
#4  0x00007f213dbbfe0c in QQuickWindow::event(QEvent*) () at /lib64/libQt5Quick.so.5
#5  0x00007f213edfd443 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#6  0x00007f213fa76be8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#7  0x00007f213feb9174 in QPlatformWindow::windowEvent(QEvent*) () at /lib64/libQt5Gui.so.5
#8  0x00007f213ee0465a in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#9  0x00007f213fa76be8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#10 0x00007f213fac7283 in QTimerInfoList::activateTimers() () at /lib64/libQt5Core.so.5
#11 0x00007f213fac5850 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#12 0x00007f212c5064e2 in QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5
#13 0x00007f213fa755f2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#14 0x00007f213fa7db34 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#15 0x000055d2e93e6398 in main ()
[Inferior 1 (process 9779) detached]
Comment 4 Emanuele Spirito 2022-08-24 12:00:44 UTC 
Created attachment 151549 [details]
Another crash log
Comment 5 Nate Graham 2022-08-30 20:31:54 UTC 

*** This bug has been marked as a duplicate of bug 451612 ***
Comment 6 Diaa Sami 2022-09-01 13:47:24 UTC 
Created attachment 151761 [details]
New crash information added by DrKonqi

kwin_x11 (5.25.4) using Qt 5.15.2

Happens frequently while using alt-tab, especially when alt is held long enough for the switcher to show.

-- Backtrace (Reduced):
#7  0x00007f0ef2723712 in blorp_update_clear_color.part[cold] () at /usr/lib64/dri/iris_dri.so
#8  0x00007f0ef3373ce9 in iris_fence_flush () at /usr/lib64/dri/iris_dri.so
#9  0x00007f0ef2908479 in fence_sync () at /usr/lib64/dri/iris_dri.so
#10 0x00007f0f0d90f833 in KWin::WindowThumbnailItem::updateOffscreenTexture() () at /lib64/libkwin.so.5
#11 0x00007f0f0c94d7d9 in void doActivate<false>(QObject*, int, void**) () at /lib64/libQt5Core.so.5