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Bug#883405: marked as done (plasmashell crashes when multiple right-click menus used)

Your message dated Sat, 25 Jan 2020 11:42:42 +0000
with message-id <5f3192c5-a289-1b4c-67bc-86a919c40681@zoho.com>
and subject line fixed in buster
has caused the Debian Bug report #883405,
regarding plasmashell crashes when multiple right-click menus used
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
883405: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=883405
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: libqt5wayland5,plasma-workspace-wayland
Version: 5.7.1~20161021-2,4:5.8.6-2.1
Severity: minor

To reproduce (>50% but not 100% reproducible):
- right-click on two areas, opening both their right-click menus (the example below was two application launchers, but the desktop then an empty section of the bottom bar also works) 
- click "Task Manager settings" in the second menu
- click Cancel
The screen briefly goes black, then reappears with a crash reporter icon in the system tray; opening this finds the following backtrace.
It can only be set up under Wayland: under X11, opening another right-click menu closes the first. The backtrace also points to libqt5wayland5, but it is possible the real bug is elsewhere.
Possibly related: upstream bugs https://bugs.kde.org/show_bug.cgi?id=375411 and https://bugs.kde.org/show_bug.cgi?id=377345 crash in the same place, but it's unclear whether they had two menus open.
Copying and pasting the backtrace also seems to be difficult: it always took two attempts to kwrite, and never worked at all to gedit.
Triggering this bug too many times can make the screen *stay* black (i.e. potential data loss, but seems unlikely to happen outside of deliberate testing).
I have only tested stable, as I suspect running a full desktop in a build chroot won't work. 

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fab044cd940 (LWP 939))]

Thread 9 (Thread 0x7faa3bbff700 (LWP 1087)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007faaff297c6b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x55bdfd01e900) at thread/qwaitcondition_unix.cpp:143 #2 QWaitCondition::wait (this=this@entry=0x55bdfd01eac8, mutex=mutex@entry=0x55bdfd01eac0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215 #3 0x00007fab0251c405 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55bdfd01eab8) at scenegraph/qsgthreadedrenderloop.cpp:242 #4 QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55bdfd01ea40) at scenegraph/qsgthreadedrenderloop.cpp:690 #5 0x00007fab0251ccfa in QSGRenderThread::run (this=0x55bdfd01ea40) at scenegraph/qsgthreadedrenderloop.cpp:719 #6 0x00007faaff296da8 in QThreadPrivate::start (arg=0x55bdfd01ea40) at thread/qthread_unix.cpp:368 #7 0x00007faafe3a9494 in start_thread (arg=0x7faa3bbff700) at pthread_create.c:333 #8 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 8 (Thread 0x7faa40981700 (LWP 1051)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007faaff297c6b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x55bdfca21e80) at thread/qwaitcondition_unix.cpp:143 #2 QWaitCondition::wait (this=this@entry=0x55bdfca55768, mutex=mutex@entry=0x55bdfca55760, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215 #3 0x00007fab0251c405 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55bdfca55758) at scenegraph/qsgthreadedrenderloop.cpp:242 #4 QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55bdfca556e0) at scenegraph/qsgthreadedrenderloop.cpp:690 #5 0x00007fab0251ccfa in QSGRenderThread::run (this=0x55bdfca556e0) at scenegraph/qsgthreadedrenderloop.cpp:719 #6 0x00007faaff296da8 in QThreadPrivate::start (arg=0x55bdfca556e0) at thread/qthread_unix.cpp:368 #7 0x00007faafe3a9494 in start_thread (arg=0x7faa40981700) at pthread_create.c:333 #8 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 7 (Thread 0x7faa52c9a700 (LWP 1038)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007faaff297c6b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x55bdfb70f4b0) at thread/qwaitcondition_unix.cpp:143 #2 QWaitCondition::wait (this=this@entry=0x55bdfbaab7c8, mutex=mutex@entry=0x55bdfbaab7c0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215 #3 0x00007fab0251c405 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x55bdfbaab7b8) at scenegraph/qsgthreadedrenderloop.cpp:242 #4 QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x55bdfbaab740) at scenegraph/qsgthreadedrenderloop.cpp:690 #5 0x00007fab0251ccfa in QSGRenderThread::run (this=0x55bdfbaab740) at scenegraph/qsgthreadedrenderloop.cpp:719 #6 0x00007faaff296da8 in QThreadPrivate::start (arg=0x55bdfbaab740) at thread/qthread_unix.cpp:368 #7 0x00007faafe3a9494 in start_thread (arg=0x7faa52c9a700) at pthread_create.c:333 #8 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 6 (Thread 0x7faa58a56700 (LWP 1037)):
#0  0x00007faafeba66ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1 0x00007faafa5219f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7faa540013c0, timeout=<optimized out>, context=0x7faa54000990) at ././glib/gmain.c:4228 #2 g_main_context_iterate (context=context@entry=0x7faa54000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924 #3 0x00007faafa521b0c in g_main_context_iteration (context=0x7faa54000990, may_block=may_block@entry=1) at ././glib/gmain.c:3990 #4 0x00007faaff4bb06b in QEventDispatcherGlib::processEvents (this=0x7faa540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #5 0x00007faaff4649ca in QEventLoop::exec (this=this@entry=0x7faa58a55c10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212 #6 0x00007faaff2920f3 in QThread::exec (this=this@entry=0x55bdfb6e0e30) at thread/qthread.cpp:507 #7 0x00007fab024ad406 in QQuickPixmapReader::run (this=0x55bdfb6e0e30) at util/qquickpixmapcache.cpp:822 #8 0x00007faaff296da8 in QThreadPrivate::start (arg=0x55bdfb6e0e30) at thread/qthread_unix.cpp:368 #9 0x00007faafe3a9494 in start_thread (arg=0x7faa58a56700) at pthread_create.c:333 #10 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 5 (Thread 0x7faae639f700 (LWP 1032)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fab03f252c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 #2 0x00007fab03f25309 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5 #3 0x00007faafe3a9494 in start_thread (arg=0x7faae639f700) at pthread_create.c:333 #4 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 4 (Thread 0x7faae7fff700 (LWP 1013)):
#0  0x00007faafeba271d in read () at ../sysdeps/unix/syscall-template.S:84
#1 0x00007faafa565d40 in read (__nbytes=16, __buf=0x7faae7ffea40, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44 
#2  g_wakeup_acknowledge (wakeup=0x7faae00025a0) at ././glib/gwakeup.c:210
#3 0x00007faafa5214be in g_main_context_check (context=context@entry=0x7faadc000990, max_priority=2147483647, fds=fds@entry=0x7faadc002e70, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707 #4 0x00007faafa521994 in g_main_context_iterate (context=context@entry=0x7faadc000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926 #5 0x00007faafa521b0c in g_main_context_iteration (context=0x7faadc000990, may_block=may_block@entry=1) at ././glib/gmain.c:3990 #6 0x00007faaff4bb06b in QEventDispatcherGlib::processEvents (this=0x7faadc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #7 0x00007faaff4649ca in QEventLoop::exec (this=this@entry=0x7faae7ffec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212 #8 0x00007faaff2920f3 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507 #9 0x00007fab01b236a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #10 0x00007faaff296da8 in QThreadPrivate::start (arg=0x55bdfb795d60) at thread/qthread_unix.cpp:368 #11 0x00007faafe3a9494 in start_thread (arg=0x7faae7fff700) at pthread_create.c:333 #12 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 3 (Thread 0x7faaeda1c700 (LWP 970)):
#0  0x00007faafeba271d in read () at ../sysdeps/unix/syscall-template.S:84
#1 0x00007faafa565d40 in read (__nbytes=16, __buf=0x7faaeda1ba40, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44 
#2  g_wakeup_acknowledge (wakeup=0x7faae80027b0) at ././glib/gwakeup.c:210
#3 0x00007faafa5214be in g_main_context_check (context=context@entry=0x7faae0000990, max_priority=2147483647, fds=fds@entry=0x7faae0003070, n_fds=n_fds@entry=1) at ././glib/gmain.c:3707 #4 0x00007faafa521994 in g_main_context_iterate (context=context@entry=0x7faae0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3926 #5 0x00007faafa521b0c in g_main_context_iteration (context=0x7faae0000990, may_block=may_block@entry=1) at ././glib/gmain.c:3990 #6 0x00007faaff4bb06b in QEventDispatcherGlib::processEvents (this=0x7faae00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #7 0x00007faaff4649ca in QEventLoop::exec (this=this@entry=0x7faaeda1bc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212 #8 0x00007faaff2920f3 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507 #9 0x00007fab01b236a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #10 0x00007faaff296da8 in QThreadPrivate::start (arg=0x55bdfb745050) at thread/qthread_unix.cpp:368 #11 0x00007faafe3a9494 in start_thread (arg=0x7faaeda1c700) at pthread_create.c:333 #12 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 2 (Thread 0x7faaef452700 (LWP 956)):
#0  0x00007faafeba66ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1 0x00007faafa5219f6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7faae8003220, timeout=<optimized out>, context=0x7faae8000990) at ././glib/gmain.c:4228 #2 g_main_context_iterate (context=context@entry=0x7faae8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ././glib/gmain.c:3924 #3 0x00007faafa521b0c in g_main_context_iteration (context=0x7faae8000990, may_block=may_block@entry=1) at ././glib/gmain.c:3990 #4 0x00007faaff4bb06b in QEventDispatcherGlib::processEvents (this=0x7faae80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #5 0x00007faaff4649ca in QEventLoop::exec (this=this@entry=0x7faaef451c50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212 #6 0x00007faaff2920f3 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507 #7 0x00007fab0460e6d5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5 #8 0x00007faaff296da8 in QThreadPrivate::start (arg=0x7fab04683d60) at thread/qthread_unix.cpp:368 #9 0x00007faafe3a9494 in start_thread (arg=0x7faaef452700) at pthread_create.c:333 #10 0x00007faafebafaff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 

Thread 1 (Thread 0x7fab044cd940 (LWP 939)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7 0x00007faaf0d32cad in QtWaylandClient::QWaylandDisplay::handleKeyboardFocusChanged (this=0x55bdfb681e80, inputDevice=<optimized out>) at qwaylanddisplay.cpp:418 #8 0x00007faaf0d29e1e in QtWaylandClient::QWaylandInputDevice::Keyboard::keyboard_leave (this=0x55bdfb687990, time=<optimized out>, surface=<optimized out>) at qwaylandinputdevice.cpp:629 
#9  0x00007faafa0cc038 in ffi_call_unix64 () at ../src/x86/unix64.S:76
#10 0x00007faafa0cba9a in ffi_call (cif=cif@entry=0x7ffc7f66a120, fn=<optimized out>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffc7f66a1f0) at ../src/x86/ffi64.c:525 #11 0x00007faafe19bf2e in wl_closure_invoke (closure=closure@entry=0x55bdfd80fcc0, flags=flags@entry=1, target=<optimized out>, target@entry=0x55bdfb687af0, opcode=opcode@entry=2, data=<optimized out>) at ../src/connection.c:935 #12 0x00007faafe198bc0 in dispatch_event (display=display@entry=0x55bdfb6702d0, queue=<optimized out>) at ../src/wayland-client.c:1310 #13 0x00007faafe199e14 in dispatch_queue (queue=0x55bdfb670398, display=0x55bdfb6702d0) at ../src/wayland-client.c:1456 #14 wl_display_dispatch_queue_pending (display=0x55bdfb6702d0, queue=0x55bdfb670398) at ../src/wayland-client.c:1698 #15 0x00007faafe199e6c in wl_display_dispatch_pending (display=<optimized out>) at ../src/wayland-client.c:1761 #16 0x00007faaf0d31812 in QtWaylandClient::QWaylandDisplay::flushRequests (this=0x55bdfb681e80) at qwaylanddisplay.cpp:181 #17 0x00007faaff4925e9 in QMetaObject::activate (sender=sender@entry=0x55bdfb6ea8a0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3740 #18 0x00007faaff492f07 in QMetaObject::activate (sender=sender@entry=0x55bdfb6ea8a0, m=m@entry=0x7faaff6b0360 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3602 #19 0x00007faaff50bd53 in QAbstractEventDispatcher::awake (this=this@entry=0x55bdfb6ea8a0) at .moc/moc_qabstracteventdispatcher.cpp:143 #20 0x00007faaff4bb08e in QEventDispatcherGlib::processEvents (this=0x55bdfb6ea8a0, flags=...) at kernel/qeventdispatcher_glib.cpp:430 #21 0x00007faaff4649ca in QEventLoop::exec (this=this@entry=0x7ffc7f66a540, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212 #22 0x00007faaff46d13c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261 #23 0x000055bdfa4c206f in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:166
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--- Begin Message --- 
The above no longer causes a crash in current buster.

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