Crash when accessing OS file dialog (Linux)

Issue type

Crash or freeze

Description with steps to reproduce

1. Start AppImage from the command line
2. Choose File | Open
3. Musescore crashes without showing a file dialog

Expected behaviour: it should show a file dialog

Supporting files, videos and screenshots

MuseScore_241028_154448.log

https://github.com/user-attachments/assets/6ce830bd-e7f8-4f39-8582-5d9b244bc907

What is the latest version of MuseScore Studio where this issue is present?

4.4.3

Regression

Yes, this used to work in a previous version of MuseScore 4.x

Operating system

Manjaro Linux, Cinnamon Desktop

Additional context

I’ve previously used the package from the official repo (i.e. the Arch package), but it’s currently at version 4.3.2. I’ve also used the Flatpak version (currently 4.4.2), which generally works fine, but does not export SVG correctly. It was after noticing this problem that I tried the AppImage which crashed when I tried to export. If you re-open a file from the main window, no file dialog is required.

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible