Bug 506769

Summary: Gradient button on toolbar is "undefined" if Krita is closed after selecting a custom gradient with a custom tag
Product: [Applications] krita Reporter: Noel Santos <noel>
Component: Resource ManagementAssignee: Krita Bugs <krita-bugs-null>
Status: REPORTED ---    
Severity: normal    
Priority: NOR    
Version First Reported In: nightly build (please specify the git hash!)   
Target Milestone: ---   
Platform: Appimage   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Noel Santos 2025-07-08 18:02:38 UTC 
SUMMARY

The gradient button on the toolbar becomes empty/blank after reloading Krita with a custom gradient selected, which leads to crashes under some circumstances, e.g. https://bugs.kde.org/show_bug.cgi?id=505986

STEPS TO REPRODUCE
1. Click on the gradient button the toolbar
2. Add a new gradient called "Black to White"
3. Add a new gradient tag called "Basic Gradients"
4. Tag the gradient with the tag.
5. Select the "Basic Gradients" tag
6. Select the "Black to White" gradient
7. Close Krita
8. Open Krita
9. Create a new document

OBSERVED RESULT

The gradient button is empty.

EXPECTED RESULT

The gradient that I selected before should be displayed, or some valid fallback gradient should be selected.

SOFTWARE/OS VERSIONS
I'm on Linux Mint.
Git hash: 3cc9811

ADDITIONAL INFORMATION

This bug is partially documented on this thread https://krita-artists.org/t/linux-mint-users-lets-try-crashing-krita-with-the-index-colors-filter/128334/

Empty button: https://krita-artists.org/uploads/default/original/3X/2/8/28e60d57e8351739171af81b4c55786b5b7967a1.png

Dropdown with valid gradient selected: https://krita-artists.org/uploads/default/original/3X/7/c/7cc5eb0c0cb2b228b8b9b88d534030fa23b0b6f5.png