[digikam] [Bug 494034] New: Assign color picks and filtering on a color pick, change the color pick to none crashes digikam

[Fred Engst]

https://bugs.kde.org/show_bug.cgi?id=494034

            Bug ID: 494034
           Summary: Assign color picks and filtering on a color pick,
                    change the color pick to none crashes digikam
    Classification: Applications
           Product: digikam
           Version: 8.4.0
          Platform: macOS (DMG)
                OS: macOS
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: Albums-Filters
          Assignee: digikam-bugs-null at kde.org
          Reporter: fredengst at gmail.com
  Target Milestone: ---

Created attachment 174364
  --> https://bugs.kde.org/attachment.cgi?id=174364&action=edit
MacOS crash report

SUMMARY
While restriction is based on a color pick, reassigning the pick color to
"none" leads to a repeatable crash.
I have over 60k photos. Some are on an external hard drive, and others are on
an external SSD.


STEPS TO REPRODUCE
1. Assign a large selection of photos (over 10k for example) with  "Assign
Labels" -> "Picks" to color green in the "Thumbnails" view.
2. Set right side filter restriction based on "Labels Filter" being "Picks" to
Green.
3. Select all those photos that are shown.
4. Change the "Assign Labels" -> "Picks" from "Green" to "None."

OBSERVED RESULT
 Digikam crashes.

EXPECTED RESULT
0 photos shown.

SOFTWARE/OS VERSIONS
Windows: 
macOS:  14.7
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
It will not crash if only a portion of the photos are selected.

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