Bug 458232

Created attachment 151535 [details]
Example using a not-yet-released version of the Nova7 icon theme

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE
1. Install a theme which uses a design with gradients and/or multiple colours for the icon change-date-symbolic. It does not matter whether the icons are saved as png (fixed) or svg (scalable).
2. Go to system settings > appearance
3. Open any of the subcategories which feature a download option (e.g. colours or icons)
4. Click the 'Get New...' button
5. Click the 'Recent' drop-down menu


OBSERVED RESULT
The icon for 'Show most recent first' will always display as a solid black surface with no gradients; irrespective of whether the icon file used is a png or svg vector image.

EXPECTED RESULT
The icon is displayed as intended by the artist.

Note: the reason why I am filing this as a bug is twofold:

- The same behaviour does not apply to the other icons in the same drop-down menu: these all display correctly;
- The same icon (change-date-symbolic) is used for the 'Recent' button itself, where it does display correctly.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon
(available in About System)
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.97.0
Qt Version: 5.15.5

ADDITIONAL INFORMATION
I suspect this has not been noticed thus far since the Breeze 'change-date-symbolic' icon uses a solid black design without any gradients.

I also wonder what the guidelines for using 'symbolic' icons are. The only information I have been able to find on 'symbolic' icons was on this page for the Gnome, not KDE project: https://wiki.gnome.org/Design/OS/SymbolicIcons. The reasons for using 'symbolic' icons listed on that page do not appear to apply here. What is more, none of the other entries in this drop-down menu use 'symbolic' versions of regular icons.