GNU bug report logs - #36924
GDM, GNOME Shell, etc. break when there are stale caches

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From: reyman via web <issues.guix.gnu.org <at> elephly.net>
To: 36924 <at> debbugs.gnu.org
Subject: bug#36924: GDM, GNOME Shell, etc. break when there are stale caches
Date: Mon,  4 Jul 2022 23:38:57 +0200

Hi there
After removing `gdm login` using a transformer and forget to modify/amend it into build-custom-services i break my system : 

(define-public %dm/system-services
  (append (build-custom-services identity)
            (modify-services %desktop-services
            (delete gdm-service-type))))

My gnome crash, and when i even when i try to roll-back, it was impossible to login, my screen freeze at login/password, just before gnome start.

Error in message : 

ul  4 17:44:11 localhost elogind[427]: New session c1 of user gdm.
Jul  4 17:44:11 localhost gdm-session-worker: GLib-GObject: g_object_unref: assertion 'G_IS_OBJECT (object)' failed 
Jul  4 17:44:11 localhost gdm: Gdm: GdmDisplay: Session never registered, failing 
Jul  4 17:44:11 localhost elogind[427]: Removed session c1.
Jul  4 17:44:11 localhost gdm: Gdm: Child process -552 was already dead. 
Jul  4 17:44:11 localhost gdm: Gdm: GdmDisplay: Session never registered, failing 
Jul  4 17:44:11 localhost gdm: Gdm: Child process -552 was already dead. 

Removing /var/lib/gdm and mkdir gdm, rebooting with rollback solving the problem. 

during a guix system reconfigure

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