Bug 412037

Summary: Discover crashed when closed immediately after opening via a Snap url
Product: [Applications] Discover Reporter: Patrick Silva <bugseforuns>
Component: discoverAssignee: Dan Leinir Turthra Jensen <leinir>
Status: RESOLVED UPSTREAM    
Severity: crash CC: aleixpol, nate
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Patrick Silva 2019-09-18 19:35:27 UTC 
I can reproduce this crash sometimes.

STEPS TO REPRODUCE
1. go to https://snapcraft.io/vidcutter
2. click on green "Install" button,
3. click on "View in desktop store" button (Discover opens)
4. close Discover immediately after it to load the screenshots of VidCutter

Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.16.80
KDE Frameworks Version: 5.63.0
Qt Version: 5.12.3

Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fedf24f6e00 (LWP 5166))]

Thread 14 (Thread 0x7fed58ff9700 (LWP 5200)):
#0  g_mutex_unlock (mutex=0x7fed24000bf0) at ../../../../glib/gthread-posix.c:1355
#1  0x00007fede73df169 in g_main_context_dispatch (context=context@entry=0x7fed24000bf0) at ../../../../glib/gmain.c:3834
#2  0x00007fede73df650 in g_main_context_iterate (context=context@entry=0x7fed24000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3902
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x7fed24000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fed24000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fed58ff8c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007feded8c44ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x7fed701518e0) at thread/qthread_unix.cpp:361
#8  0x00007fedece8c6db in start_thread (arg=0x7fed58ff9700) at pthread_create.c:463
#9  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fed597fa700 (LWP 5199)):
#0  g_main_context_acquire (context=0x7fed30000bf0) at ../../../../glib/gmain.c:3256
#1  0x00007fede73df485 in g_main_context_iterate (context=context@entry=0x7fed30000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3852
#2  0x00007fede73df6dc in g_main_context_iteration (context=0x7fed30000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#3  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fed30000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fed597f9c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007feded8c44ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x56036d16a900) at thread/qthread_unix.cpp:361
#7  0x00007fedece8c6db in start_thread (arg=0x7fed597fa700) at pthread_create.c:463
#8  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fed59ffb700 (LWP 5198)):
#0  0x00007feded1b8bf9 in __GI___poll (fds=0x7fed2c011020, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fede73df5c9 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7fed2c011020, timeout=<optimized out>, context=0x7fed2c000bf0) at ../../../../glib/gmain.c:4203
#2  g_main_context_iterate (context=context@entry=0x7fed2c000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3897
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x7fed2c000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fed2c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fed59ffac60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007feded8c44ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x7fed38014ba0) at thread/qthread_unix.cpp:361
#8  0x00007fedece8c6db in start_thread (arg=0x7fed59ffb700) at pthread_create.c:463
#9  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fed5a7fc700 (LWP 5197)):
#0  0x00007fede7425649 in g_mutex_lock (mutex=mutex@entry=0x7fed38000bf0) at ../../../../glib/gthread-posix.c:1343
#1  0x00007fede73dee1f in g_main_context_check (context=context@entry=0x7fed38000bf0, max_priority=2147483647, fds=fds@entry=0x7fed380116c0, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3661
#2  0x00007fede73df570 in g_main_context_iterate (context=context@entry=0x7fed38000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x7fed38000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fed38000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fed5a7fbbf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007feded8c44ca in QThread::exec (this=this@entry=0x560370f585a0) at thread/qthread.cpp:531
#7  0x00007fedf0fb4926 in QQuickPixmapReader::run (this=0x560370f585a0) at util/qquickpixmapcache.cpp:953
#8  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x560370f585a0) at thread/qthread_unix.cpp:361
#9  0x00007fedece8c6db in start_thread (arg=0x7fed5a7fc700) at pthread_create.c:463
#10 0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fed7af61700 (LWP 5181)):
[KCrash Handler]
#7  0x00007feddf4b1cf9 in wl_proxy_marshal (proxy=0x0, opcode=opcode@entry=2) at ../src/wayland-client.c:780
#8  0x00007feddf93729a in wl_surface_damage (height=<optimized out>, width=<optimized out>, y=<optimized out>, x=<optimized out>, wl_surface=<optimized out>) at ../../include/QtWaylandClient/5.12.3/QtWaylandClient/private/../../../../../src/client/wayland-wayland-client-protocol.h:2753
#9  QtWayland::wl_surface::damage (this=<optimized out>, x=<optimized out>, y=<optimized out>, width=<optimized out>, height=<optimized out>) at qwayland-wayland.cpp:1124
#10 0x00007feddf91a474 in QtWaylandClient::QWaylandWindow::damage (this=<optimized out>, rect=...) at qwaylandwindow.cpp:565
#11 0x00007feddf924a69 in QtWaylandClient::QWaylandAbstractDecoration::contentImage (this=0x7fed7024f0f0) at qwaylandabstractdecoration.cpp:134
#12 0x00007fedd239a778 in QtWaylandClient::DecorationsBlitter::blit (window=0x56036d572900, this=<optimized out>) at ../../../../hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp:198
#13 QtWaylandClient::QWaylandGLContext::swapBuffers (this=0x56036eff4ec0, surface=<optimized out>) at ../../../../hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp:556
#14 0x00007fedee9e6dbf in QOpenGLContext::swapBuffers (this=0x56036eff4ea0, surface=<optimized out>) at kernel/qopenglcontext.cpp:1115
#15 0x00007fedf1036ed9 in QSGRenderThread::syncAndRender (this=this@entry=0x56036eff4f20) at scenegraph/qsgthreadedrenderloop.cpp:652
#16 0x00007fedf103aae8 in QSGRenderThread::run (this=0x56036eff4f20) at scenegraph/qsgthreadedrenderloop.cpp:730
#17 0x00007feded8c5c72 in QThreadPrivate::start (arg=0x56036eff4f20) at thread/qthread_unix.cpp:361
#18 0x00007fedece8c6db in start_thread (arg=0x7fed7af61700) at pthread_create.c:463
#19 0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fed7b762700 (LWP 5180)):
#0  g_mutex_unlock (mutex=0x7fed6c000bf0) at ../../../../glib/gthread-posix.c:1355
#1  0x00007fede73deac0 in g_main_context_prepare (context=context@entry=0x7fed6c000bf0, priority=priority@entry=0x7fed7b761b20) at ../../../../glib/gmain.c:3542
#2  0x00007fede73df4fb in g_main_context_iterate (context=context@entry=0x7fed6c000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3882
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x7fed6c000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fed6c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fed7b761c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007feded8c44ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x56036d447ad0) at thread/qthread_unix.cpp:361
#8  0x00007fedece8c6db in start_thread (arg=0x7fed7b762700) at pthread_create.c:463
#9  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fedb113b700 (LWP 5176)):
#0  g_mutex_unlock (mutex=0x7fed9c000bf0) at ../../../../glib/gthread-posix.c:1355
#1  0x00007fede73def58 in g_main_context_check (context=context@entry=0x7fed9c000bf0, max_priority=2147483647, fds=fds@entry=0x7fed9c0efd60, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3806
#2  0x00007fede73df570 in g_main_context_iterate (context=context@entry=0x7fed9c000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x7fed9c000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fed9c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fedb113ac60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007feded8c44ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x56036d978820) at thread/qthread_unix.cpp:361
#8  0x00007fedece8c6db in start_thread (arg=0x7fedb113b700) at pthread_create.c:463
#9  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fedb2732700 (LWP 5175)):
#0  0x00007feded1b8bf9 in __GI___poll (fds=0x7feda8004630, nfds=1, timeout=8255) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fede73df5c9 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7feda8004630, timeout=<optimized out>, context=0x7feda8000bf0) at ../../../../glib/gmain.c:4203
#2  g_main_context_iterate (context=context@entry=0x7feda8000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3897
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x7feda8000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7feda8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fedb2731c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007feded8c44ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x56036d97a350) at thread/qthread_unix.cpp:361
#8  0x00007fedece8c6db in start_thread (arg=0x7fedb2732700) at pthread_create.c:463
#9  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fedc1146700 (LWP 5171)):
#0  0x00007feded1b40b4 in __GI___libc_read (fd=15, buf=buf@entry=0x7fedc1145b90, nbytes=nbytes@entry=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fede74242d0 in read (__nbytes=16, __buf=0x7fedc1145b90, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  g_wakeup_acknowledge (wakeup=0x56036d93a7b0) at ../../../../glib/gwakeup.c:210
#3  0x00007fede73df0b7 in g_main_context_check (context=context@entry=0x56036d938bd0, max_priority=2147483647, fds=fds@entry=0x56036d93afa0, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3680
#4  0x00007fede73df570 in g_main_context_iterate (context=0x56036d938bd0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#5  0x00007fede73df962 in g_main_loop_run (loop=0x56036d938d10) at ../../../../glib/gmain.c:4098
#6  0x00007fede5acb0e6 in gdbus_shared_thread_func (user_data=0x56036d938ba0) at ../../../../gio/gdbusprivate.c:275
#7  0x00007fede7407195 in g_thread_proxy (data=0x56036d92d8a0) at ../../../../glib/gthread.c:784
#8  0x00007fedece8c6db in start_thread (arg=0x7fedc1146700) at pthread_create.c:463
#9  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fedc1947700 (LWP 5170)):
#0  0x00007fede7425649 in g_mutex_lock (mutex=mutex@entry=0x56036d92c180) at ../../../../glib/gthread-posix.c:1343
#1  0x00007fede73de470 in g_main_context_acquire (context=0x56036d92c180) at ../../../../glib/gmain.c:3237
#2  0x00007fede73df485 in g_main_context_iterate (context=context@entry=0x56036d92c180, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3852
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x56036d92c180, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fede73df721 in glib_worker_main (data=<optimized out>) at ../../../../glib/gmain.c:5772
#5  0x00007fede7407195 in g_thread_proxy (data=0x56036d92d800) at ../../../../glib/gthread.c:784
#6  0x00007fedece8c6db in start_thread (arg=0x7fedc1947700) at pthread_create.c:463
#7  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fedca8ed700 (LWP 5169)):
#0  0x00007fedece929f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56036d23d5bc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x56036d23d568, cond=0x56036d23d590) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x56036d23d590, mutex=0x56036d23d568) at pthread_cond_wait.c:655
#3  0x00007fedcb4d20aa in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fedcb4d1dd7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fedece8c6db in start_thread (arg=0x7fedca8ed700) at pthread_create.c:463
#6  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fedda920700 (LWP 5168)):
#0  g_main_context_check (context=context@entry=0x7fedcc000bf0, max_priority=2147483647, fds=fds@entry=0x7fedcc004e00, n_fds=n_fds@entry=1) at ../../../../glib/gmain.c:3705
#1  0x00007fede73df570 in g_main_context_iterate (context=context@entry=0x7fedcc000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3899
#2  0x00007fede73df6dc in g_main_context_iteration (context=0x7fedcc000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#3  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fedcc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7fedda91fc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007feded8c44ca in QThread::exec (this=this@entry=0x56036cfc0b60) at thread/qthread.cpp:531
#6  0x00007fedee50c115 in QQmlThreadPrivate::run (this=0x56036cfc0b60) at qml/ftw/qqmlthread.cpp:148
#7  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x56036cfc0b60) at thread/qthread_unix.cpp:361
#8  0x00007fedece8c6db in start_thread (arg=0x7fedda920700) at pthread_create.c:463
#9  0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7feddbb31700 (LWP 5167)):
#0  g_mutex_unlock (mutex=0x7fedd4000bf0) at ../../../../glib/gthread-posix.c:1355
#1  0x00007fede73deac0 in g_main_context_prepare (context=context@entry=0x7fedd4000bf0, priority=priority@entry=0x7feddbb30af0) at ../../../../glib/gmain.c:3542
#2  0x00007fede73df4fb in g_main_context_iterate (context=context@entry=0x7fedd4000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3882
#3  0x00007fede73df6dc in g_main_context_iteration (context=0x7fedd4000bf0, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3963
#4  0x00007fededafbdcb in QEventDispatcherGlib::processEvents (this=0x7fedd4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7feddbb30c30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007feded8c44ca in QThread::exec (this=this@entry=0x7fedefb6bd80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:531
#7  0x00007fedef8f4015 in QDBusConnectionManager::run (this=0x7fedefb6bd80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007feded8c5c72 in QThreadPrivate::start (arg=0x7fedefb6bd80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:361
#9  0x00007fedece8c6db in start_thread (arg=0x7feddbb31700) at pthread_create.c:463
#10 0x00007feded1c588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fedf24f6e00 (LWP 5166)):
#0  0x00007fedece929f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56036dfea080) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x56036dfea030, cond=0x56036dfea058) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x56036dfea058, mutex=0x56036dfea030) at pthread_cond_wait.c:655
#3  0x00007feded8ccdbb in QWaitConditionPrivate::wait (deadline=..., this=0x56036dfea030) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x56036eff4f60, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007feded8cd0c9 in QWaitCondition::wait (this=0x56036eff4f68, mutex=0x56036eff4f60, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fedf1038799 in QSGThreadedRenderLoop::handleObscurity (this=this@entry=0x56036d047b80, w=0x56036eff4fc0) at scenegraph/qsgthreadedrenderloop.cpp:1024
#7  0x00007fedf103895b in QSGThreadedRenderLoop::hide (this=0x56036d047b80, window=0x56036d01caf0) at scenegraph/qsgthreadedrenderloop.cpp:868
#8  0x00007fedee9b3655 in QWindow::event (this=this@entry=0x56036d01caf0, ev=ev@entry=0x7ffcdfa8aca0) at kernel/qwindow.cpp:2341
#9  0x00007fedf1099025 in QQuickWindow::event (this=0x56036d01caf0, e=0x7ffcdfa8aca0) at items/qquickwindow.cpp:1675
#10 0x00007fedef1da65c in QApplicationPrivate::notify_helper (this=this@entry=0x56036cef8680, receiver=receiver@entry=0x56036d01caf0, e=e@entry=0x7ffcdfa8aca0) at kernel/qapplication.cpp:3736
#11 0x00007fedef1e1b90 in QApplication::notify (this=0x7ffcdfa8b7d0, receiver=0x56036d01caf0, e=0x7ffcdfa8aca0) at kernel/qapplication.cpp:3483
#12 0x00007fededa9ed18 in QCoreApplication::notifyInternal2 (receiver=0x56036d01caf0, event=0x7ffcdfa8aca0) at kernel/qcoreapplication.cpp:1060
#13 0x00007fededa9eeee in QCoreApplication::sendEvent (receiver=receiver@entry=0x56036d01caf0, event=event@entry=0x7ffcdfa8aca0) at kernel/qcoreapplication.cpp:1450
#14 0x00007fedee9b3251 in QWindowPrivate::setVisible (this=<optimized out>, visible=<optimized out>) at kernel/qwindow.cpp:406
#15 0x00007fedee9b25dc in QWindowPrivate::destroy (this=0x56036d105890) at kernel/qwindow.cpp:1889
#16 0x00007fedee9b371f in QWindow::event (this=this@entry=0x56036d01caf0, ev=ev@entry=0x7ffcdfa8b0a0) at kernel/qwindow.cpp:2304
#17 0x00007fedf1099025 in QQuickWindow::event (this=0x56036d01caf0, e=0x7ffcdfa8b0a0) at items/qquickwindow.cpp:1675
#18 0x00007fedef1da65c in QApplicationPrivate::notify_helper (this=this@entry=0x56036cef8680, receiver=receiver@entry=0x56036d01caf0, e=e@entry=0x7ffcdfa8b0a0) at kernel/qapplication.cpp:3736
#19 0x00007fedef1e1b90 in QApplication::notify (this=0x7ffcdfa8b7d0, receiver=0x56036d01caf0, e=0x7ffcdfa8b0a0) at kernel/qapplication.cpp:3483
#20 0x00007fededa9ed18 in QCoreApplication::notifyInternal2 (receiver=0x56036d01caf0, event=0x7ffcdfa8b0a0) at kernel/qcoreapplication.cpp:1060
#21 0x00007fededa9eefe in QCoreApplication::sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7ffcdfa8b0a0) at kernel/qcoreapplication.cpp:1462
#22 0x00007fedee9a53f5 in QGuiApplicationPrivate::processCloseEvent (e=0x5603710d8990) at kernel/qguiapplication.cpp:2453
#23 0x00007fedee9a9395 in QGuiApplicationPrivate::processWindowSystemEvent (e=0x5603710d8990) at kernel/qguiapplication.cpp:1878
#24 0x00007fedee981f05 in QWindowSystemInterfacePrivate::handleWindowSystemEvent<QWindowSystemInterface::SynchronousDelivery> (ev=0x5603710d8990) at kernel/qwindowsysteminterface.cpp:105
#25 0x00007fedee99759b in QPlatformWindow::close (this=<optimized out>) at kernel/qplatformwindow.cpp:352
#26 0x00007fede16e1dae in ffi_call_unix64 () at ../src/x86/unix64.S:76
#27 0x00007fede16e171f in ffi_call (cif=cif@entry=0x7ffcdfa8b2c0, fn=<optimized out>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffcdfa8b390) at ../src/x86/ffi64.c:525
#28 0x00007feddf4b4e24 in wl_closure_invoke (closure=0x7fed702b32a0, flags=<optimized out>, target=<optimized out>, opcode=1, data=<optimized out>) at ../src/connection.c:1006
#29 0x00007feddf4b1659 in dispatch_event (display=display@entry=0x56036cf1fc50, queue=<optimized out>) at ../src/wayland-client.c:1427
#30 0x00007feddf4b2b24 in dispatch_queue (queue=0x56036cf1fd18, display=0x56036cf1fc50) at ../src/wayland-client.c:1573
#31 wl_display_dispatch_queue_pending (display=0x56036cf1fc50, queue=0x56036cf1fd18) at ../src/wayland-client.c:1815
#32 0x00007feddf4b2b7c in wl_display_dispatch_pending (display=<optimized out>) at ../src/wayland-client.c:1878
#33 0x00007feddf916292 in QtWaylandClient::QWaylandDisplay::flushRequests (this=0x56036cf1c8d0) at qwaylanddisplay.cpp:186
#34 0x00007fededace875 in QMetaObject::activate (sender=sender@entry=0x56036cf4baa0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3795
#35 0x00007fededacef47 in QMetaObject::activate (sender=sender@entry=0x56036cf4baa0, m=m@entry=0x7fededf4b320 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3648
#36 0x00007fededa9b2b3 in QAbstractEventDispatcher::awake (this=this@entry=0x56036cf4baa0) at .moc/moc_qabstracteventdispatcher.cpp:148
#37 0x00007fededafbdee in QEventDispatcherGlib::processEvents (this=0x56036cf4baa0, flags=...) at kernel/qeventdispatcher_glib.cpp:429
#38 0x00007fededa9d03a in QEventLoop::exec (this=this@entry=0x7ffcdfa8b710, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#39 0x00007fededaa6170 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1363
#40 0x000056036ae4caea in main (argc=<optimized out>, argv=<optimized out>) at ./discover/main.cpp:168
Comment 1 Aleix Pol 2019-10-09 11:50:42 UTC 
This is a crash in Qt Wayland, not much we can do from Discover.