`gnome-shell` crashes when opening file via Gtk portal

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I’m on Arch and just updated the system today. I was using Transmission via flatpak (latest version) but this happens with every other flatpak that opens the older file/directory picker instead of Nautilus, so I’m assuming that this has something to do with the Gtk desktop portal.

I was in the process of asking Transmission to move the contents of a torrent to another download directory. After it opened the directory picker, I clicked on the sidebar to select the directory I wanted (that was listed in the recents list) and my entire session crashed.

Looking through the system logs, I could see that nouveau crashed, which caused gnome-shell to crash. The relevant logs are here.

As I can’t actually tell if this is a nouveau or a gnome-shell bug, I’m posting this to ask you for guidance in order to better diagnose this situation.

Thank you for your attention.

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The crash happens deep in gallium (which is part of mesa) and after a nouveau kernel driver error, so most likely an issue on the nouveau side.

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Thank you for your time.

Do you know how can I report this issue to them and what kind of information should I provide?

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Mesa would be a good starting point: https://gitlab.freedesktop.org/mesa/mesa/-/issues

You should at least include the log you provided here that contains all the kernel messages. And you should include a backtrace of the crash with debug symbols. There should be some article in the Arch wiki how to get debug symbols using debuginfod. Then you can use the instructions from Stack Traces - GNOME Project Handbook