Bug 493980

Application: karbon (3.2.1)

Qt Version: 5.15.13
Frameworks Version: 5.115.0
Operating System: Linux 6.8.0-45-generic x86_64
Windowing System: X11
Distribution: Ubuntu 24.04.1 LTS
DrKonqi: 5.27.11 [KCrashBackend]

-- Information about the crash:
I think a video explains it well: https://youtu.be/3aGlA7BgDhw

The crash can be reproduced every time.

-- Backtrace:
Application: Karbon (karbon), signal: Segmentation fault

[KCrash Handler]
#4  0x0000716dc12a34ca in KoPathPoint::setProperty(KoPathPoint::PointProperty) () from /lib/x86_64-linux-gnu/libflake.so.17
#5  0x0000716da760cb78 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/karbon/extensions/karbon_roundcorners.so
#6  0x0000716da760d452 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/karbon/extensions/karbon_roundcorners.so
#7  0x0000716dc188ecf2 in KUndo2Command::redo() () from /lib/x86_64-linux-gnu/libkundo2.so.17
#8  0x0000716dc1891e18 in KUndo2QStack::push(KUndo2Command*) () from /lib/x86_64-linux-gnu/libkundo2.so.17
#9  0x0000716dc1d12dbf in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x0000716dc2164f94 in QAction::triggered(bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x0000716dc2167eab in QAction::activate(QAction::ActionEvent) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x0000716dc22fc512 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x0000716dc2304702 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x0000716dc21b0df8 in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x0000716dc216bd45 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x0000716dc21746b0 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x0000716dc2ae6b4f in KoApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libkomain.so.17
#18 0x0000716dc1cd8118 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x0000716dc2172874 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x0000716dc21cb5d2 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x0000716dc21cdfbf in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x0000716dc216bd45 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x0000716dc2ae6b4f in KoApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libkomain.so.17
#24 0x0000716dc1cd8118 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x0000716dc0345a3b in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#26 0x0000716dc0317bfc in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#27 0x0000716dbb6fcd06 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#28 0x0000716dbf7145b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x0000716dbf773717 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x0000716dbf713a53 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x0000716dc1d35279 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x0000716dc1cd6a7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x0000716dc1cdf3e8 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x0000716dc2b7b253 in kdemain () from /lib/x86_64-linux-gnu/libkdeinit5_karbon.so
#35 0x0000716dc282a1ca in __libc_start_call_main (main=main@entry=0x62cec9b97060, argc=argc@entry=1, argv=argv@entry=0x7ffd31c33d08) at ../sysdeps/nptl/libc_start_call_main.h:58
#36 0x0000716dc282a28b in __libc_start_main_impl (main=0x62cec9b97060, argc=1, argv=0x7ffd31c33d08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd31c33cf8) at ../csu/libc-start.c:360
#37 0x000062cec9b97095 in ?? ()
[Inferior 1 (process 12031) detached]

Reported using DrKonqi