different workspaces in single instances not correctly opened

[Freubert]

Bug Description:

When trying to open several single instances of Theia AppImage or Snap app (Ubuntu 24.04), only the first instance opens the given workspace.

Steps to Reproduce:

1. Open Theia with a workspace path as command line parameter
2. Theia opens with given workspace loaded
3. Open a second instance of Theia with a path of another workspace as command line parameter
4. Theia opens without any workspace loaded

I didn't build Theia myself. I tried this with the downloadable AppImage and also with the snap package for Ubuntu 24.04.

Additional Information

• Operating System: Ubuntu 24.04 (Gnome)
• Theia Version: 1.57.1

[msujew]

Probably a consequence of #13831. cc @tsmaeder.

[sdirix]

I can reproduce the issue. Something seems to go wrong when handling the command line parameters for the second "instance" (i.e. window). The error is likely located here or at least should be investigated starting from there.