Bug 521106

Can you please attach Help -> Show Krita log for bug reports?
You could also try to run Krita with gdb: `gdb krita_executable`, for example for the appimage: `gdb krita-5.3.2.1-x86_64.AppImage`. Then `r` to start it, then `bt` to see the backtrace when Krita finally crashes.

Created attachment 193198 [details]
The bug report from Krita

this is the bug report how you asked it for, sorry for the long wait, life was a wee bit busy :(

🐛🧹 Thanks for your comment!

Automatically switching the status to REPORTED so the team can perform further triage.

In the future you may also do this yourself when providing needed information.

I can reproduce this one. We continue to use a combined shape that was deleted. Sometimes it leads to an assert, and Krita can recover from it. Sometimes it's a crash.

Assert:
SAFE ASSERT (krita): "d->listeners.contains(listener)" in file C:/krita-dev/krita/libs/flake/KoShape.cpp, line 1163

Crash stack:
Exception thrown at 0x00007FFB133A97D3 (libkritaflake.dll) in krita.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF.

>	libkritaflake.dll!QListData::begin() Line 118	C++
 	libkritaflake.dll!QList<KoShape::ShapeChangeListener *>::contains_impl(KoShape::ShapeChangeListener * const & t, QListData::ArrayCompatibleLayout) Line 1098	C++
 	libkritaflake.dll!QList<KoShape::ShapeChangeListener *>::contains(KoShape::ShapeChangeListener * const & t) Line 1081	C++
 	libkritaflake.dll!KoShape::removeShapeChangeListener(KoShape::ShapeChangeListener * listener) Line 1163	C++
 	krita_flaketools.dll!DefaultToolTextPropertiesInterface::slotSelectionChanged() Line 2465	C++
 	krita_flaketools.dll!DefaultToolTextPropertiesInterface::qt_static_metacall(QObject * _o, QMetaObject::Call _c, int _id, void * * _a) Line 326	C++
 	Qt5Core.dll!00007ffaf514f11d()	Unknown
 	libkritaui.dll!KisSelectedShapesProxy::selectionChanged() Line 157	C++
 	libkritaui.dll!KisSelectedShapesProxy::qt_static_metacall(QObject * _o, QMetaObject::Call _c, int _id, void * * _a) Line 82	C++
 	Qt5Core.dll!00007ffaf514f11d()	Unknown
 	libkritaflake.dll!KoShapeManager::selectionChanged() Line 195	C++
 	libkritaflake.dll!KoShapeManager::qt_static_metacall(QObject * _o, QMetaObject::Call _c, int _id, void * * _a) Line 107	C++
 	Qt5Core.dll!00007ffaf514f11d()	Unknown
 	libkritaflake.dll!KoSelection::selectionChanged() Line 150	C++
 	libkritaflake.dll!KoSelection::qt_static_metacall(QObject * _o, QMetaObject::Call _c, int _id, void * * _a) Line 79	C++
 	Qt5Core.dll!00007ffaf514f11d()	Unknown
 	libkritaglobal.dll!KisThreadSafeSignalCompressor::timeout() Line 184	C++
 	libkritaglobal.dll!KisThreadSafeSignalCompressor::qt_static_metacall(QObject * _o, QMetaObject::Call _c, int _id, void * * _a) Line 98	C++
 	Qt5Core.dll!00007ffaf514f11d()	Unknown
 	libkritaglobal.dll!KisSignalCompressor::timeout() Line 153	C++
 	libkritaglobal.dll!KisSignalCompressor::tryEmitSignalSafely() Line 200	C++
 	libkritaglobal.dll!KisSignalCompressor::tryEmitOnTick(bool isFromTimer) Line 176	C++
 	libkritaglobal.dll!KisSignalCompressor::slotTimerExpired() Line 212	C++
 	libkritaglobal.dll!KisSignalCompressor::qt_static_metacall(QObject * _o, QMetaObject::Call _c, int _id, void * * _a) Line 94	C++
 	Qt5Core.dll!00007ffaf514f11d()	Unknown
 	Qt5Core.dll!00007ffaf5153de3()	Unknown
 	Qt5Core.dll!00007ffaf5144020()	Unknown
 	Qt5Widgets.dll!00007ffafa01c382()	Unknown
 	Qt5Widgets.dll!00007ffafa01d613()	Unknown
 	libkritaui.dll!KisApplication::notify(QObject * receiver, QEvent * event) Line 920	C++
 	Qt5Core.dll!00007ffaf511bc65()	Unknown
 	Qt5Core.dll!00007ffaf516eac4()	Unknown
 	Qt5Core.dll!00007ffaf516e80d()	Unknown
 	[External Code]	
 	Qt5Core.dll!00007ffaf516f91f()	Unknown
 	qwindows.dll!00007ffb0b2e7ba5()	Unknown
 	Qt5Core.dll!00007ffaf5118ef5()	Unknown
 	Qt5Core.dll!00007ffaf511c21d()	Unknown
 	krita.dll!00007ffb1a44741f()	Unknown
 	krita.exe!00007ff722c813d8()	Unknown
 	krita.exe!00007ff722c81311()	Unknown
 	krita.exe!00007ff722c81156()	Unknown
 	[External Code]

Using "Merge points" instead of "Join with Segment" leads to the same crash stack.

A possibly relevant merge request was started @ https://invent.kde.org/graphics/krita/-/merge_requests/2828

Git commit eadecc881937c0e1c50f771e850e3938b4f4734e by Dmitry Kazakov, on behalf of Elena Sagalaeva.
Committed on 25/06/2026 at 07:34.
Pushed by dkazakov into branch 'master'.

Fix bug 521106. Remove combined shapes from a selected shapes list after deletion.

Combined shapes sometimes remain in the selected shapes list and might be used, leading to a crash. I added code, which removes deleted combined shapes from the selected shapes list.

## Test Plan

Follow the repro steps in 521106. Krita doesn't crash anymore.

## Formalities Checklist

- [x] I confirmed this builds.
- [x] I confirmed Krita ran and the relevant functions work.
- [x] I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!)
- [x] I made sure my commits build individually and have good descriptions as per [KDE guidelines](https://community.kde.org/Policies/Commit_Policy).
- [x] I made sure my code conforms to the standards set in the HACKING file.
- [x] I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per [KDE Licensing Policy](https://community.kde.org/Policies/Licensing_Policy).
- [ ] Does the patch add a user-visible feature? If yes, is there a documentation MR ready for it at [Krita Documentation Repository](https://invent.kde.org/documentation/docs-krita-org)?

**_Reminder: the reviewer is responsible for merging the patch, this is to ensure at the least two people can build the patch. In case a patch breaks the build, both the author and the reviewer should be contacted to fix the build._** **_If this is not possible, the commits shall be reverted, and a notification with the reasoning and any relevant logs shall be sent to the mailing list, _****_kimageshop@kde.org_****_._**

M  +3    -2    plugins/tools/defaulttool/defaulttool/DefaultTool.cpp

https://invent.kde.org/graphics/krita/-/commit/eadecc881937c0e1c50f771e850e3938b4f4734e

Git commit 59021c70bae58a88dae8e87821aa36f58134a3f1 by Dmitry Kazakov, on behalf of Elena Sagalaeva.
Committed on 25/06/2026 at 07:35.
Pushed by dkazakov into branch 'krita/6.0'.

Fix bug 521106. Remove combined shapes from a selected shapes list after deletion.

Combined shapes sometimes remain in the selected shapes list and might be used, leading to a crash. I added code, which removes deleted combined shapes from the selected shapes list.

## Test Plan

Follow the repro steps in 521106. Krita doesn't crash anymore.

## Formalities Checklist

- [x] I confirmed this builds.
- [x] I confirmed Krita ran and the relevant functions work.
- [x] I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!)
- [x] I made sure my commits build individually and have good descriptions as per [KDE guidelines](https://community.kde.org/Policies/Commit_Policy).
- [x] I made sure my code conforms to the standards set in the HACKING file.
- [x] I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per [KDE Licensing Policy](https://community.kde.org/Policies/Licensing_Policy).
- [ ] Does the patch add a user-visible feature? If yes, is there a documentation MR ready for it at [Krita Documentation Repository](https://invent.kde.org/documentation/docs-krita-org)?

**_Reminder: the reviewer is responsible for merging the patch, this is to ensure at the least two people can build the patch. In case a patch breaks the build, both the author and the reviewer should be contacted to fix the build._** **_If this is not possible, the commits shall be reverted, and a notification with the reasoning and any relevant logs shall be sent to the mailing list, _****_kimageshop@kde.org_****_._**

M  +3    -2    plugins/tools/defaulttool/defaulttool/DefaultTool.cpp

https://invent.kde.org/graphics/krita/-/commit/59021c70bae58a88dae8e87821aa36f58134a3f1