Bug 418306

SUMMARY
I was reporting a Discover crash on Wayland.
Weirdly keyboard input stopped working in bug description step, then I clicked
on "Back" button to try to copy the backtrace and report the Discover crash manually. Drkonqi crashed after the second or third click on "Back" button, I do not remember well.

Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.18.80
KDE Frameworks Version: 5.68.0
Qt Version: 5.14.1


Application: The KDE Crash Handler (drkonqi), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efd51ca2800 (LWP 9238))]

Thread 3 (Thread 0x7efd307e8700 (LWP 9242)):
#0  0x00007efd4af479f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56068fb60bb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x56068fb60b68, cond=0x56068fb60b90) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x56068fb60b90, mutex=0x56068fb60b68) at pthread_cond_wait.c:655
#3  0x00007efd31e85ebb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007efd31e85ab7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007efd4af416db in start_thread (arg=0x7efd307e8700) at pthread_create.c:463
#6  0x00007efd4d2a988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7efd3e400700 (LWP 9239)):
#0  0x00007efd4d2980b4 in __GI___libc_read (fd=5, buf=0x7efd3e3ffb60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007efd48c632d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efd48c1e0b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efd48c1e570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efd48c1e6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efd4de1b0db in QEventDispatcherGlib::processEvents (this=0x7efd38000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007efd4ddba63a in QEventLoop::exec (this=this@entry=0x7efd3e3ffd70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007efd4dbcb317 in QThread::exec (this=this@entry=0x7efd4edd5da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:536
#8  0x00007efd4eb5d555 in QDBusConnectionManager::run (this=0x7efd4edd5da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:179
#9  0x00007efd4dbcc7ec in QThreadPrivate::start (arg=0x7efd4edd5da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:342
#10 0x00007efd4af416db in start_thread (arg=0x7efd3e400700) at pthread_create.c:463
#11 0x00007efd4d2a988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7efd51ca2800 (LWP 9238)):
[KCrash Handler]
#7  QScreen::handle (this=this@entry=0x100000000) at kernel/qscreen.cpp:156
#8  0x00007efd4f23fd53 in QTipLabel::placeTip (this=0x56068ff1c240, pos=..., w=<optimized out>, w@entry=0x56068fd45960) at kernel/qtooltip.cpp:408
#9  0x00007efd4f24005d in QToolTip::showText (pos=..., text=..., w=w@entry=0x56068fd45960, rect=..., msecDisplayTime=-1) at kernel/qtooltip.cpp:514
#10 0x00007efd4f218266 in QWidget::event (this=0x56068fd45960, event=0x7fff03ba5330) at kernel/qwidget.cpp:9006
#11 0x00007efd4f1d68bc in QApplicationPrivate::notify_helper (this=this@entry=0x56068f82bbd0, receiver=receiver@entry=0x56068fd45960, e=e@entry=0x7fff03ba5330) at kernel/qapplication.cpp:3684
#12 0x00007efd4f1de4cb in QApplication::notify (this=<optimized out>, receiver=0x56068fd45960, e=0x7fff03ba5330) at kernel/qapplication.cpp:3350
#13 0x00007efd4ddbbdb8 in QCoreApplication::notifyInternal2 (receiver=0x56068fd45960, event=0x7fff03ba5330) at kernel/qcoreapplication.cpp:1092
#14 0x00007efd4ddbbf8e in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x7fff03ba5330) at kernel/qcoreapplication.cpp:1487
#15 0x00007efd4f1dc3a0 in QApplication::event (this=0x7fff03ba5a80, e=0x7fff03ba5630) at kernel/qapplication.cpp:1903
#16 0x00007efd4f1d68bc in QApplicationPrivate::notify_helper (this=this@entry=0x56068f82bbd0, receiver=receiver@entry=0x7fff03ba5a80, e=e@entry=0x7fff03ba5630) at kernel/qapplication.cpp:3684
#17 0x00007efd4f1ddac0 in QApplication::notify (this=0x7fff03ba5a80, receiver=0x7fff03ba5a80, e=0x7fff03ba5630) at kernel/qapplication.cpp:3430
#18 0x00007efd4ddbbdb8 in QCoreApplication::notifyInternal2 (receiver=0x7fff03ba5a80, event=0x7fff03ba5630) at kernel/qcoreapplication.cpp:1092
#19 0x00007efd4de1a549 in QTimerInfoList::activateTimers (this=0x56068f868090) at kernel/qtimerinfo_unix.cpp:643
#20 0x00007efd4de1ad49 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:183
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:230
#22 0x00007efd48c1e417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007efd48c1e650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007efd48c1e6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007efd4de1b0bc in QEventDispatcherGlib::processEvents (this=0x56068f86fb30, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#26 0x00007efd4ddba63a in QEventLoop::exec (this=this@entry=0x7fff03ba5880, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#27 0x00007efd4ddc3db0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1400
#28 0x000056068dba5539 in ?? ()
#29 0x00007efd4d1a9b97 in __libc_start_main (main=0x56068dba4250, argc=19, argv=0x7fff03ba5c88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff03ba5c78) at ../csu/libc-start.c:310
#30 0x000056068dba642a in _start ()