Bug 424543

Application: plasmashell (5.19.3)

Qt Version: 5.15.0
Frameworks Version: 5.72.0
Operating System: Linux 5.7.9-arch1-1 x86_64
Windowing system: X11
Distribution: "Arch Linux"

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

I was moving a widget from my primary screen to my secondary screen, when I noticed the letters on the widget were getting scrambled.
Then, I clicked on the Show Background button of the widget, and Plasma suddenly crashed.

- Unusual behavior I noticed:

The scrambled letters on the widget.

- Custom settings of the application:

I tried with both the Network Speed graph, the CPU Usage graph, and both gave me the same problem.

- Extra:

I just tried to reproduce the bug and make a screenshot to attach to the report, but as soon as I pressed PrintScr to take the screenshot, Plasma froze and stopped drawing the screen, leaving the KDE Crash Handler as the only usable application.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault

[KCrash Handler]
#4  0x00007f145a9f6cc4 in QSGBatchRenderer::Renderer::prepareAlphaBatches() () at /usr/lib/libQt5Quick.so.5
#5  0x00007f145aa0985c in QSGBatchRenderer::Renderer::render() () at /usr/lib/libQt5Quick.so.5
#6  0x00007f145a9f1df2 in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/libQt5Quick.so.5
#7  0x00007f145a9f22d4 in QSGRenderer::renderScene(unsigned int) () at /usr/lib/libQt5Quick.so.5
#8  0x00007f145aa52973 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib/libQt5Quick.so.5
#9  0x00007f145aabe501 in QQuickWindowPrivate::renderSceneGraph(QSize const&, QSize const&) () at /usr/lib/libQt5Quick.so.5
#10 0x00007f145aa60a3f in  () at /usr/lib/libQt5Quick.so.5
#11 0x00007f145aa613d7 in  () at /usr/lib/libQt5Quick.so.5
#12 0x00007f1458dd7e0f in  () at /usr/lib/libQt5Core.so.5
#13 0x00007f14582af422 in start_thread () at /usr/lib/libpthread.so.0
#14 0x00007f1458a62bf3 in clone () at /usr/lib/libc.so.6

#1  0x00007f1458ddde84 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007f145aa5ee7b in  () at /usr/lib/libQt5Quick.so.5
#3  0x00007f145aa6141b in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007f1458dd7e0f in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f14582af422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f1458a62bf3 in clone () at /usr/lib/libc.so.6

#1  0x00007f14574b6168 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1457467221 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f145901534c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f1458fbb13c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f1458dd6c32 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f145a714789 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f1458dd7e0f in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f14582af422 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f1458a62bf3 in clone () at /usr/lib/libc.so.6

#1  0x00007f14574b6168 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f1457467221 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f145901534c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f1458fbb13c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f1458dd6c32 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f145a0c7098 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f1458dd7e0f in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f14582af422 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f1458a62bf3 in clone () at /usr/lib/libc.so.6

#1  0x00007f1458ddde84 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007f145aa63157 in  () at /usr/lib/libQt5Quick.so.5
#3  0x00007f145aacc0a7 in QQuickWindow::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#4  0x00007f1459ae0702 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#5  0x00007f1458fbc7ba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#6  0x00007f14593862b9 in QPlatformWindow::windowEvent(QEvent*) () at /usr/lib/libQt5Gui.so.5
#7  0x00007f1459ae745c in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#8  0x00007f1458fbc7ba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#9  0x00007f14590146b5 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#10 0x00007f1459014f9a in  () at /usr/lib/libQt5Core.so.5
#11 0x00007f145746843c in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#12 0x00007f14574b61d9 in  () at /usr/lib/libglib-2.0.so.0
#13 0x00007f1457467221 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#14 0x00007f1459015331 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#15 0x00007f1458fbb13c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#16 0x00007f1458fc35c4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#17 0x0000559c38dcdf5d in  ()
#18 0x00007f145898a002 in __libc_start_main () at /usr/lib/libc.so.6
#19 0x0000559c38dce19e in _start ()
[Inferior 1 (process 811) detached]

Possible duplicates by query: bug 424023, bug 424022, bug 422585, bug 420427, bug 418888.

Reported using DrKonqi