[MU4 Issue] MS4 crashes Cinnamon desktop (Linux Mint)
Describe the bug
This happened was reported before (see #12038) but can now be reproduced. The cue in this case is to try to close a tab when the Properties > Appearance panel is open.
To Reproduce
- Open the attached file. slides_in_out.zip
- Click on a slide in and ensure that the Properties > Appearance panel is open.
- Now click on the close tab icon (cross) RESULT: Cinnamon desktop crashes. A window will eventually appear allowing you to restart the desktop.
Platform information OS: Linux Mint 20.1, Arch.: x86_64, MuseScore version (64-bit): 4.0.0-2826032396, revision: github-musescore-musescore-2d21253
Can reproduce it on my LinuxMint20.2 as well

Thanks for logging!
There seem to be numerous ways to crash the desktop. Another way:
- Create a new file with just a treble staff in C major.
- Enter a few notes in measure 1.
- Click on a notehead, then select "Appearance".
- Select "Color". RESULT: The program freezes; shortly after the desktop crashes.
If this doesn't work, repeat the procedure or select more than notehead first. And perhaps experiment by adjusting different properties in the "Appearance" section etc.
There seem to be numerous ways to crash the desktop. Another way:
- Create a new file with just a treble staff in C major.
- Enter a few notes in measure 1.
- Click on a notehead, then select "Appearance".
- Select "Color". RESULT: The program freezes; shortly after the desktop crashes.
If this doesn't work, repeat the procedure or select more than notehead first. And perhaps experiment by adjusting different properties in the "Appearance" section etc.
Yes, can reproduce in that way too
Fixed in #12797
@rgreen5 Can you check please on your side as well? It looks fine on my Linux now.
Thanks!
OS: Linux Mint 20.1, Arch.: x86_64, MuseScore version (64-bit): 4.0.0-2931312884, revision: github-musescore-musescore-c4515b8
No problems here either.
Thanks for checking!