[konsole] [Bug 423862] New: Crash on KWin windowed mode toggle to fullscreen

RJVB bugzilla_noreply at kde.org
Sat Jul 4 10:00:46 BST 2020 

https://bugs.kde.org/show_bug.cgi?id=423862

            Bug ID: 423862
           Summary: Crash on KWin windowed mode toggle to fullscreen
           Product: konsole
           Version: unspecified
          Platform: Compiled Sources
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: rjvbertin at gmail.com
  Target Milestone: ---

Application: konsole (18.11.70)
 (Compiled from sources)
Qt Version: 5.9.8
Frameworks Version: 5.60.0
Operating System: Linux 4.14.23-ck1-mainline-core2-rjvb x86_64
Windowing system: Wayland
Distribution: Ubuntu 14.04.6 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Testing kwin_wayland (5.13.3) in windowed mode under X11. I get this crash
systematically when I toggle the window fullscreen (via the WM, or even change
its size). It happens with Qt 5.9.8 and Qt 5.12.6 .

I don't see in the backtrace exactly how this is a KWin bug (and not one in Qt)
but I'm reporting it here because it's KWin that triggers the bug

- Unusual behaviour I noticed:
Just before the application crashes I notice a reduction in font size, as if
the DPI setting changed (it's set to 86DPI in the "parent" X11 session)

The crash can be reproduced every time.

-- Backtrace:
Application: Konsole (konsole), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9c230d4840 (LWP 20094))]

Thread 3 (Thread 0x7f9c082dd700 (LWP 20097)):
#0  0x00007f9c1b601d5f in ppoll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f9c1c40b6af in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() from /opt/local/libexec/qt512/lib/libQt5Core.so.5
#2  0x00007f9c1c40c98d in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /opt/local/libexec/qt512/lib/libQt5Core.so.5
#3  0x00007f9c1c3b75df in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/opt/local/libexec/qt512/lib/libQt5Core.so.5
#4  0x00007f9c1c1f77b7 in QThread::exec() () from
/opt/local/libexec/qt512/lib/libQt5Core.so.5
#5  0x00007f9c1def4840 in QDBusConnectionManager::run() () from
/opt/local/libexec/qt512/lib/libQt5DBus.so.5
#6  0x00007f9c1c1f8946 in QThreadPrivate::start(void*) () from
/opt/local/libexec/qt512/lib/libQt5Core.so.5
#7  0x00007f9c19cfb184 in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007f9c1b60f03d in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 2 (Thread 0x7f9c0acdf700 (LWP 20096)):
#0  0x00007f9c19cff404 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f9c0be71a6b in cnd_wait (cond=<optimized out>, mtx=<optimized out>)
at ../mesa-18.3.3/include/c11/threads_posix.h:155
#2  util_queue_thread_func (input=<optimized out>) at
../mesa-18.3.3/src/util/u_queue.c:270
#3  0x00007f9c0be723b6 in impl_thrd_routine (p=<optimized out>) at
../mesa-18.3.3/include/c11/threads_posix.h:87
#4  0x00007f9c19cfb184 in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f9c1b60f03d in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7f9c230d4840 (LWP 20094)):
[KCrash Handler]
#6  QScopedPointer<QtWaylandClient::QWaylandCursor,
QScopedPointerDeleter<QtWaylandClient::QWaylandCursor> >::operator! (this=0xa0)
at /opt/local/libexec/qt512/include/QtCore/qscopedpointer.h:123
#7  QtWaylandClient::QWaylandScreen::waylandCursor (this=0x0) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandscreen.cpp:187
#8  0x00007f9c0de8a12e in QtWaylandClient::QWaylandInputDevice::setCursor
(this=<optimized out>, newShape=Qt::ArrowCursor, screen=<optimized out>) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandinputdevice.cpp:367
#9  QtWaylandClient::QWaylandInputDevice::setCursor (this=0x197ea30,
cursor=..., screen=0x0) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandinputdevice.cpp:386
#10 0x00007f9c0de960c1 in QtWaylandClient::QWaylandWindow::setMouseCursor
(this=<optimized out>, device=0x0, cursor=...) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandwindow.cpp:992
#11 QtWaylandClient::QWaylandWindow::restoreMouseCursor (this=<optimized out>,
device=0x0) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandwindow.cpp:997
#12 0x00007f9bfd65bda5 in
QtWaylandClient::QWaylandBradientDecoration::handleMouse (this=0x1dddbc0,
inputDevice=0x197ea30, local=..., global=..., b=..., mods=...) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/plugins/decorations/bradient/main.cpp:277
#13 0x00007f9c0de95d5e in
QtWaylandClient::QWaylandWindow::handleMouseEventWithDecoration
(this=0x1d97920, inputDevice=0x197ea30, e=...) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandwindow.cpp:926
#14 0x00007f9c0de95ae0 in QtWaylandClient::QWaylandWindow::handleMouse
(this=0x1d97920, inputDevice=0x197ea30, e=...) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandwindow.cpp:876
#15 0x00007f9c0de8a563 in
QtWaylandClient::QWaylandInputDevice::Pointer::pointer_enter (this=0x19809e0,
serial=<optimized out>, surface=<optimized out>, sx=157952, sy=48128) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylandinputdevice.cpp:472
#16 0x00007f9c0c9142cc in ffi_call_unix64 () from /opt/local/lib/libffi.so.6
#17 0x00007f9c0c912f5c in ffi_call () from /opt/local/lib/libffi.so.6
#18 0x00007f9c0d5e8ef1 in wl_closure_invoke (closure=<optimized out>,
flags=<optimized out>, target=<optimized out>, opcode=0, data=<optimized out>)
at src/connection.c:1018
#19 0x00007f9c0d5e7215 in dispatch_event (display=<optimized out>,
queue=<optimized out>) at src/wayland-client.c:1445
#20 0x00007f9c0d5e6a44 in dispatch_queue (display=0x196d110, queue=<optimized
out>) at src/wayland-client.c:1591
#21 wl_display_dispatch_queue_pending (display=0x196d110, queue=0x196d1e0) at
src/wayland-client.c:1833
#22 0x00007f9c0de8ecc3 in QtWaylandClient::QWaylandDisplay::flushRequests
(this=0x1979e20) at
/opt/local/var/lnxports/build/_opt_local_site-ports_qt_qt5/qt5-qtwayland/work/qtwayland-everywhere-src-5.12.6/src/client/qwaylanddisplay.cpp:191
#23 0x00007f9c1c3eba27 in QMetaObject::activate(QObject*, int, int, void**) ()
from /opt/local/libexec/qt512/lib/libQt5Core.so.5
#24 0x00007f9c1c3f3893 in QSocketNotifier::event(QEvent*) () from
/opt/local/libexec/qt512/lib/libQt5Core.so.5
#25 0x00007f9c1d3b834d in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /opt/local/libexec/qt512/lib/libQt5Widgets.so.5
#26 0x00007f9c1d3b9729 in QApplication::notify(QObject*, QEvent*) () from
/opt/local/libexec/qt512/lib/libQt5Widgets.so.5
#27 0x00007f9c1c3bba73 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /opt/local/libexec/qt512/lib/libQt5Core.so.5
#28 0x00007f9c1c40c133 in
QEventDispatcherUNIXPrivate::activateSocketNotifiers() () from
/opt/local/libexec/qt512/lib/libQt5Core.so.5
#29 0x00007f9c1c40ca79 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /opt/local/libexec/qt512/lib/libQt5Core.so.5
#30 0x00007f9c0debc9ea in
QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /opt/local/libexec/qt512/lib/libQt5WaylandClient.so.5
#31 0x00007f9c1c3b75df in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/opt/local/libexec/qt512/lib/libQt5Core.so.5
#32 0x00007f9c1c3bc031 in QCoreApplication::exec() () from
/opt/local/libexec/qt512/lib/libQt5Core.so.5
#33 0x00007f9c22d346a0 in kdemain (argc=<optimized out>, argv=<optimized out>)
at
/opt/local/var/lnxports/build/_opt_local_site-ports_kf5_konsole5/kf5-konsole-devel/work/kf5-konsole-5/src/main.cpp:207
#34 0x00007f9c1b532f45 in __libc_start_main () from
/lib/x86_64-linux-gnu/libc.so.6
#35 0x0000000000400989 in _start ()

Reported using DrKonqi

-- 
You are receiving this mail because:
You are the assignee for the bug.

More information about the konsole-devel mailing list