https://bugs.kde.org/show_bug.cgi?id=462228

            Bug ID: 462228
           Summary: Undo does not restore removed tracks if the user
                    marked all tracks for deletion
    Classification: Applications
           Product: kdenlive
           Version: 22.08.3
          Platform: Microsoft Windows
                OS: Microsoft Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Video Display & Export
          Assignee: j...@kdenlive.org
          Reporter: krzysztof.swia...@student.uj.edu.pl
  Target Milestone: ---

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
***

In case user marks all tracks for deletion and attempts to undo this operation,
the application will not restore any tracks. Should further undos affect the
phantom clips (i.e. the clips that should have been restored on the removed
tracks), kdenlive will freeze.


STEPS TO REPRODUCE
1. Open the application.
2. Put a video into the project bin.
3. Drag a video into the V1 track.
4. Drag a video into the V2 track.
5. Move both clips along the tracks.
6. Right-click on either track.
7. Select "Delete track..." from the menu.
8. Mark all tracks for deletion.
9. Press CTRL and Z at least 3 times.

OBSERVED RESULT
Kdenlive freezes.

EXPECTED RESULT
Kdenlive restores the deleted tracks and moves both clips onto their original
position.

SOFTWARE/OS VERSIONS
Windows: 10
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 5.98.0 
Qt Version: 5.15.5

ADDITIONAL INFORMATION

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