https://bugs.kde.org/show_bug.cgi?id=388308
--- Comment #5 from bhell...@gmail.com --- Finally I've got the following after clicking on the Application Menu button and hovering randomly on its menu (with QSG_RENDER_LOOP=basic still set): Application: Plasma (plasmashell), signal: Segmentation fault Using host libthread_db library "/usr/lib/libthread_db.so.1". [Current thread is 1 (Thread 0x7f8ff156f800 (LWP 2075))] Thread 7 (Thread 0x7f8f33ba1700 (LWP 2081)): #0 0x00007f8fe53675f9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0 #1 0x00007f8fe533e81e in g_main_context_check () at /usr/lib/libglib-2.0.so.0 #2 0x00007f8fe533fe76 in () at /usr/lib/libglib-2.0.so.0 #3 0x00007f8fe533ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #4 0x00007f8feb3c86b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #5 0x00007f8feb36a82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #6 0x00007f8feb17a78e in QThread::exec() () at /usr/lib/libQt5Core.so.5 #7 0x00007f8feef40bcb in () at /usr/lib/libQt5Quick.so.5 #8 0x00007f8feb17fb2d in () at /usr/lib/libQt5Core.so.5 #9 0x00007f8fea33408a in start_thread () at /usr/lib/libpthread.so.0 #10 0x00007f8feaa8742f in clone () at /usr/lib/libc.so.6 Thread 6 (Thread 0x7f8f40cbc700 (LWP 2080)): #0 0x00007f8fea33a38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f8f45d81fbc in () at /usr/lib/dri/nouveau_dri.so #2 0x00007f8f45d81ec8 in () at /usr/lib/dri/nouveau_dri.so #3 0x00007f8fea33408a in start_thread () at /usr/lib/libpthread.so.0 #4 0x00007f8feaa8742f in clone () at /usr/lib/libc.so.6 Thread 5 (Thread 0x7f8fd154e700 (LWP 2079)): #0 0x00007f8fea33a38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f8ff0c91f77 in () at /usr/lib/libQt5Script.so.5 #2 0x00007f8ff0c91fb9 in () at /usr/lib/libQt5Script.so.5 #3 0x00007f8fea33408a in start_thread () at /usr/lib/libpthread.so.0 #4 0x00007f8feaa8742f in clone () at /usr/lib/libc.so.6 Thread 4 (Thread 0x7f8fd3bbe700 (LWP 2078)): #0 0x00007f8feb3c6d31 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5 #1 0x00007f8feb3c83ff in () at /usr/lib/libQt5Core.so.5 #2 0x00007f8fe533f771 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0 #3 0x00007f8fe533fdf6 in () at /usr/lib/libglib-2.0.so.0 #4 0x00007f8fe533ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #5 0x00007f8feb3c86b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #6 0x00007f8feb36a82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #7 0x00007f8feb17a78e in QThread::exec() () at /usr/lib/libQt5Core.so.5 #8 0x00007f8fee384a19 in () at /usr/lib/libQt5Qml.so.5 #9 0x00007f8feb17fb2d in () at /usr/lib/libQt5Core.so.5 #10 0x00007f8fea33408a in start_thread () at /usr/lib/libpthread.so.0 #11 0x00007f8feaa8742f in clone () at /usr/lib/libc.so.6 Thread 3 (Thread 0x7f8fd98a9700 (LWP 2077)): #0 0x00007f8fe53675f9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0 #1 0x00007f8fe53393b2 in g_main_context_query () at /usr/lib/libglib-2.0.so.0 #2 0x00007f8fe533fe4c in () at /usr/lib/libglib-2.0.so.0 #3 0x00007f8fe533ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #4 0x00007f8feb3c86b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #5 0x00007f8feb36a82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #6 0x00007f8feb17a78e in QThread::exec() () at /usr/lib/libQt5Core.so.5 #7 0x00007f8fee384a19 in () at /usr/lib/libQt5Qml.so.5 #8 0x00007f8feb17fb2d in () at /usr/lib/libQt5Core.so.5 #9 0x00007f8fea33408a in start_thread () at /usr/lib/libpthread.so.0 #10 0x00007f8feaa8742f in clone () at /usr/lib/libc.so.6 Thread 2 (Thread 0x7f8fdb2e2700 (LWP 2076)): #0 0x00007f8fe5367664 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0 #1 0x00007f8fe533f70b in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0 #2 0x00007f8fe533fdf6 in () at /usr/lib/libglib-2.0.so.0 #3 0x00007f8fe533ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #4 0x00007f8feb3c86b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #5 0x00007f8feb36a82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #6 0x00007f8feb17a78e in QThread::exec() () at /usr/lib/libQt5Core.so.5 #7 0x00007f8feb7ea416 in () at /usr/lib/libQt5DBus.so.5 #8 0x00007f8feb17fb2d in () at /usr/lib/libQt5Core.so.5 #9 0x00007f8fea33408a in start_thread () at /usr/lib/libpthread.so.0 #10 0x00007f8feaa8742f in clone () at /usr/lib/libc.so.6 Thread 1 (Thread 0x7f8ff156f800 (LWP 2075)): [KCrash Handler] #5 0x00007f8fe997ec81 in wl_proxy_create_wrapper () at /usr/lib/libwayland-client.so.0 #6 0x00007f8fd01fe37d in () at /usr/lib/libEGL_mesa.so.0 #7 0x00007f8fd01eb7cf in () at /usr/lib/libEGL_mesa.so.0 #8 0x00007f8fd0b46792 in () at /usr/lib/qt/plugins/wayland-graphics-integration-client/libwayland-egl.so #9 0x00007f8fd0b44c3e in () at /usr/lib/qt/plugins/wayland-graphics-integration-client/libwayland-egl.so #10 0x00007f8febba5a19 in QOpenGLContext::makeCurrent(QSurface*) () at /usr/lib/libQt5Gui.so.5 #11 0x00007f8feefa5b18 in () at /usr/lib/libQt5Quick.so.5 #12 0x00007f8fef019f82 in QQuickWindow::~QQuickWindow() () at /usr/lib/libQt5Quick.so.5 #13 0x00007f8f299b210f in () at /usr/lib/qt/qml/org/kde/plasma/private/kicker/libkickerplugin.so #14 0x00007f8feb39d471 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5 #15 0x00007f8febb73d09 in QWindow::event(QEvent*) () at /usr/lib/libQt5Gui.so.5 #16 0x00007f8fef023626 in QQuickWindow::event(QEvent*) () at /usr/lib/libQt5Quick.so.5 #17 0x00007f8ff0fc60b4 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/libKF5PlasmaQuick.so.5 #18 0x00007f8fec370e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5 #19 0x00007f8fec378816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5 #20 0x00007f8feb36c1e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5 #21 0x00007f8feb36ee46 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5 #22 0x00007f8feb3c90a4 in () at /usr/lib/libQt5Core.so.5 #23 0x00007f8fe533e270 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0 #24 0x00007f8fe533ff69 in () at /usr/lib/libglib-2.0.so.0 #25 0x00007f8fe533ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #26 0x00007f8feb3c8691 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #27 0x00007f8fdd5d7cd2 in () at /usr/lib/libQt5WaylandClient.so.5 #28 0x00007f8feb36a82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5 #29 0x00007f8feb373b18 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5 #30 0x00005645323cf8a3 in () #31 0x00007f8fea9b1f4a in __libc_start_main () at /usr/lib/libc.so.6 #32 0x00005645323cfc5a in _start () (side note: it seems KCrash doesn't copy the backtrace to the clipboard) -- You are 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