https://bugs.kde.org/show_bug.cgi?id=483973
--- Comment #1 from Quinten Kock <quinten@quinten.space> ---
Backtrace from the segfaulted thread. It seems to be clearing a NULL menu:
Thread 1 (Thread 0x7ffff1a1d9c0 (LWP 112356) "kcachegrind"):
#0 QMenu::clear (this=this@entry=0x0) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/widgets/qmenu.cpp:2220
acts = {<QListSpecialMethods<QAction*>> =
{<QListSpecialMethodsBase<QAction*>> = {<No data fields>}, <No data fields>}, d
= {d = 0x55555568e700, ptr = 0x7ffff7158d06
<QWidgetWindow::event(QEvent*)+502>, size = 140737488340400}}
#1 0x000055555558985e in TopLevel::backAboutToShow (this=0x55555584d100) at
/usr/src/debug/kcachegrind/kcachegrind-24.02.0/kcachegrind/toplevel.cpp:2127
#2 0x00007ffff6190ca9 in QtPrivate::QSlotObjectBase::call (a=0x7fffffffc688,
r=0x55555584d100, this=0x5555559e9540, this=<optimized out>, r=<optimized out>,
a=<optimized out>) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qobjectdefs_impl.h:433
#3 doActivate<false> (sender=0x5555559aa340, signal_index=7,
argv=0x7fffffffc688) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qobject.cpp:4039
#4 0x00007ffff72b6545 in QMenu::aboutToShow (this=0x5555559aa340) at
/usr/src/debug/qt6-base/build/src/widgets/Widgets_autogen/include/moc_qmenu.cpp:352
#5 QMenuPrivate::popup(QPoint const&, QAction*, std::function<QPoint (QSize
const&)>) (this=this@entry=0x5555559edce0, p=..., atAction=atAction@entry=0x0,
positionFunction=...) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/widgets/qmenu.cpp:2368
#6 0x00007ffff72b73e0 in QMenuPrivate::exec(QPoint const&, QAction*,
std::function<QPoint (QSize const&)>) (this=0x5555559edce0, p=..., action=0x0,
positionFunction=...) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/widgets/qmenu.cpp:2655
#7 0x00007ffff732a5df in QToolButtonPrivate::popupTimerDone
(this=0x555555dbd1c0) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/widgets/qtoolbutton.cpp:776
#8 0x00007ffff732a9fa in QToolButton::showMenu (this=<optimized out>) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/widgets/qtoolbutton.cpp:667
#9 0x00007ffff732acc2 in QToolButton::mousePressEvent (this=0x555555d6a9e0,
e=0x7fffffffcef0) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/widgets/qtoolbutton.cpp:569
#10 0x00007ffff7144fb2 in QWidget::event (this=0x555555d6a9e0,
event=0x7fffffffcef0) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qwidget.cpp:8955
#11 0x00007ffff70f438b in QApplicationPrivate::notify_helper
(this=this@entry=0x55555568f0a0, receiver=receiver@entry=0x555555d6a9e0,
e=e@entry=0x7fffffffcef0) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qapplication.cpp:3296
#12 0x00007ffff70f6be8 in QApplication::notify (this=<optimized out>,
receiver=0x555555d6a9e0, e=0x7fffffffcef0) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qapplication.cpp:2782
#13 0x00007ffff6139818 in QCoreApplication::notifyInternal2
(receiver=0x555555d6a9e0, event=0x7fffffffcef0) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qcoreapplication.cpp:1121
#14 0x00007ffff613986d in QCoreApplication::sendSpontaneousEvent
(receiver=<optimized out>, event=<optimized out>) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qcoreapplication.cpp:1553
#15 0x00007ffff70f2327 in QApplicationPrivate::sendMouseEvent
(receiver=0x555555d6a9e0, event=0x7fffffffcef0, alienWidget=0x555555d6a9e0,
nativeWidget=0x55555584d100, buttonDown=<optimized out>, lastMouseReceiver=...,
spontaneous=true, onlyDispatchEnterLeave=false) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qapplication.cpp:2366
#16 0x00007ffff7157a97 in QWidgetWindow::handleMouseEvent (this=0x555555847a00,
event=event@entry=0x7fffffffd260) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qwidgetwindow.cpp:653
#17 0x00007ffff7158db0 in QWidgetWindow::event (this=0x555555847a00,
event=0x7fffffffd260) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qwidgetwindow.cpp:267
#18 0x00007ffff70f438b in QApplicationPrivate::notify_helper (this=<optimized
out>, receiver=0x555555847a00, e=0x7fffffffd260) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qapplication.cpp:3296
#19 0x00007ffff6139818 in QCoreApplication::notifyInternal2
(receiver=0x555555847a00, event=0x7fffffffd260) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qcoreapplication.cpp:1121
#20 0x00007ffff613986d in QCoreApplication::sendSpontaneousEvent
(receiver=<optimized out>, event=<optimized out>) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qcoreapplication.cpp:1553
#21 0x00007ffff676f9e5 in QGuiApplicationPrivate::processMouseEvent
(e=0x55555630e110) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/gui/kernel/qguiapplication.cpp:2325
#22 0x00007ffff67da85c in QWindowSystemInterface::sendWindowSystemEvents
(flags=...) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/gui/kernel/qwindowsysteminterface.cpp:1109
#23 0x00007ffff6bb26c4 in userEventSourceDispatch (source=<optimized out>) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/gui/platform/unix/qeventdispatcher_glib.cpp:38
#24 0x00007ffff54c6f69 in g_main_dispatch (context=0x7fffec000ef0) at
../glib/glib/gmain.c:3476
#25 0x00007ffff55253a7 in g_main_context_dispatch_unlocked
(context=0x7fffec000ef0) at ../glib/glib/gmain.c:4284
#26 g_main_context_iterate_unlocked.isra.0
(context=context@entry=0x7fffec000ef0, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4349
#27 0x00007ffff54c5162 in g_main_context_iteration (context=0x7fffec000ef0,
may_block=1) at ../glib/glib/gmain.c:4414
#28 0x00007ffff63739c4 in QEventDispatcherGlib::processEvents
(this=0x5555556cc6b0, flags=...) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qeventdispatcher_glib.cpp:393
#29 0x00007ffff6143d6e in QEventLoop::processEvents (flags=...,
this=0x7fffffffd720) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qeventloop.cpp:100
#30 QEventLoop::exec (this=0x7fffffffd720, flags=...) at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qeventloop.cpp:182
#31 0x00007ffff613c2b8 in QCoreApplication::exec () at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/global/qflags.h:74
#32 0x00007ffff70f0f0a in QApplication::exec () at
/usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/widgets/kernel/qapplication.cpp:2574
#33 0x000055555557bbc9 in main (argc=<optimized out>, argv=<optimized out>) at
/usr/src/debug/kcachegrind/kcachegrind-24.02.0/kcachegrind/main.cpp:90
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