https://bugs.kde.org/show_bug.cgi?id=405829
Bug ID: 405829
Summary: Kwin crash when "Present Windows - Current Desktop"
Product: kwin
Version: 5.12.7
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Keywords: drkonqi
Severity: crash
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: rab24...@icloud.com
Target Milestone: ---
Application: kwin_x11 (5.12.7)
Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-42-generic x86_64
Distribution: Ubuntu 18.04.2 LTS
-- Information about the crash:
- What I was doing when the application crashed:
I moved my mouse to the top-right of the screen to activate the screen corner
that I set up to present all windows on the current desktop. It showed all my
open windows as usual, but crashed right after.
The crash does not seem to be reproducible.
-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faddc6f8cc0 (LWP 4327))]
Thread 5 (Thread 0x7fadabfff700 (LWP 4989)):
#0 0x00007faddc060cf6 in __GI_ppoll (fds=0x7fada4000d68, nfds=1,
timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1 0x00007fadd94625c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x00007fadd9463cde in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3 0x00007fadd940b9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007fadd922a22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007fadd3bb26f5 in () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6 0x00007fadd922f16d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7 0x00007fadd50c66db in start_thread (arg=0x7fadabfff700) at
pthread_create.c:463
#8 0x00007faddc06d88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 4 (Thread 0x7fada3512700 (LWP 4445)):
#0 0x00007fadd50cc9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fadd8663fb8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 0x00007fadd50cc9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7fadd8663f68, cond=0x7fadd8663f90) at pthread_cond_wait.c:502
#2 0x00007fadd50cc9f3 in __pthread_cond_wait (cond=0x7fadd8663f90,
mutex=0x7fadd8663f68) at pthread_cond_wait.c:655
#3 0x00007fadd836d5f4 in () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4 0x00007fadd836d639 in () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5 0x00007fadd50c66db in start_thread (arg=0x7fada3512700) at
pthread_create.c:463
#6 0x00007faddc06d88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 3 (Thread 0x7fadb9727700 (LWP 4402)):
#0 0x00007faddc060cf6 in __GI_ppoll (fds=0x7fadb0000d28, nfds=1,
timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1 0x00007fadd94625c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x00007fadd9463cde in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3 0x00007fadd940b9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007fadd922a22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007fadd3bb26f5 in () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6 0x00007fadd922f16d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7 0x00007fadd50c66db in start_thread (arg=0x7fadb9727700) at
pthread_create.c:463
#8 0x00007faddc06d88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 2 (Thread 0x7fadbbdf5700 (LWP 4350)):
#0 0x00007faddc060cf6 in __GI_ppoll (fds=0x7fadb400b2a8, nfds=1,
timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1 0x00007fadd94625c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x00007fadd9463cde in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3 0x00007fadd940b9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007fadd922a22a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007fadd2a8bd45 in () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6 0x00007fadd922f16d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7 0x00007fadd50c66db in start_thread (arg=0x7fadbbdf5700) at
pthread_create.c:463
#8 0x00007faddc06d88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 1 (Thread 0x7faddc6f8cc0 (LWP 4327)):
[KCrash Handler]
#6 0x000055d127145fd0 in ()
#7 0x00007faddbb683aa in KWin::Workspace::workspaceEvent(xcb_generic_event_t*)
() at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#8 0x00007fadd940a58f in
QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9 0x00007fadc34fa820 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*)
() at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#10 0x00007fadc34fb4ac in QXcbConnection::processXcbEvents() () at
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#11 0x00007fadd943d122 in QObject::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fadda18b82c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007fadda1930f4 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007fadd940d9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fadd941011d in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fadd9463af4 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fadc355c5cd in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#18 0x00007fadd940b9ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fadd9414a84 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007faddc345dbb in kdemain(int, char**) (argc=<optimized out>,
argv=0x7ffc913cba28) at ./main_x11.cpp:468
#21 0x00007faddbf6db97 in __libc_start_main (main=0x55d125265730 <main>,
argc=3, argv=0x7ffc913cba28, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffc913cba18) at ../csu/libc-start.c:310
#22 0x000055d12526576a in _start ()
Reported using DrKonqi
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