Bug 371883

Application: kwin_x11 (5.8.2)

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.8.4-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
switching tabs in Google Chrome, 
Should note that this is a Multi-monitor setup.
- Unusual behavior I noticed:
Kwin decided that chrome should be transparent, and stuck in the 'moving' phase', had to move to a tty, and ran kwin_x11 --replace to solve the issue.

The crash does not seem to be reproducible.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f41c79a6840 (LWP 11654))]

Thread 4 (Thread 0x7f41a5d58700 (LWP 11667)):
#0  0x00007f41c73f3551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f41c4aa5ac9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f41c4aa73b8 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f41c4a5423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f41c48770f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f41bf3fd2d5 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f41c487bd78 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f41c06a2454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f41c73fc7df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f41a7fff700 (LWP 11657)):
#0  0x00007f41c73f3551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f41c4aa5ac9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f41c4aa73b8 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f41c4a5423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f41c48770f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f41be5c7e55 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f41c487bd78 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f41c06a2454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f41c73fc7df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f41adc13700 (LWP 11656)):
#0  0x00007f41c73f348d in poll () at /usr/lib/libc.so.6
#1  0x00007f41c65388e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f41c653a679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f41aeaeb449 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f41c487bd78 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f41c06a2454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f41c73fc7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f41c79a6840 (LWP 11654)):
[KCrash Handler]
#6  0x00007f4196ede7b5 in  () at /usr/lib/libnvidia-glcore.so.370.28
#7  0x00007f41972d65c6 in  () at /usr/lib/libnvidia-glcore.so.370.28
#8  0x00007f419740c8b6 in  () at /usr/lib/libnvidia-glcore.so.370.28
#9  0x00007f4197087903 in  () at /usr/lib/libnvidia-glcore.so.370.28
#10 0x00007f41970517e2 in  () at /usr/lib/libnvidia-glcore.so.370.28
#11 0x00007f41c02423d1 in KWin::GLShader::link() () at /usr/lib/libkwinglutils.so.9
#12 0x00007f41c02491ef in KWin::ShaderManager::generateCustomShader(QFlags<KWin::ShaderTrait>, QByteArray const&, QByteArray const&) () at /usr/lib/libkwinglutils.so.9
#13 0x00007f41c0249312 in KWin::ShaderManager::generateShader(QFlags<KWin::ShaderTrait>) () at /usr/lib/libkwinglutils.so.9
#14 0x00007f41c02493bc in KWin::ShaderManager::shader(QFlags<KWin::ShaderTrait>) () at /usr/lib/libkwinglutils.so.9
#15 0x00007f41c02495ce in KWin::ShaderManager::pushShader(QFlags<KWin::ShaderTrait>) () at /usr/lib/libkwinglutils.so.9
#16 0x00007f41c6fab310 in  () at /usr/lib/libkwin.so.5
#17 0x00007f41c6fab636 in KWin::SceneOpenGL::createScene(QObject*) () at /usr/lib/libkwin.so.5
#18 0x00007f41c6f821dc in KWin::Compositor::slotCompositingOptionsInitialized() () at /usr/lib/libkwin.so.5
#19 0x00007f41c6f82bd2 in KWin::Compositor::setup() () at /usr/lib/libkwin.so.5
#20 0x00007f41c4a824b9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#21 0x00007f41c5735e0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#22 0x00007f41c573d581 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#23 0x00007f41c4a55de0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#24 0x00007f41c4a5856d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#25 0x00007f41c4aa71fa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#26 0x00007f41aeb640dd in  () at /usr/lib/libQt5XcbQpa.so.5
#27 0x00007f41c4a5423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#28 0x00007f41c4a5c73c in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#29 0x00007f41c76bb495 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#30 0x00007f41c7334291 in __libc_start_main () at /usr/lib/libc.so.6
#31 0x000000000040069a in _start ()

Reported using DrKonqi