Bjørn Forsman b716673f97 nixos/gdm: add assertion for the autoLogin.user option
Or else users may see this unfriendly message:

  error: cannot coerce null to a string, at .../nixos/modules/services/x11/display-managers/gdm.nix:107:49
2015-09-03 22:30:07 +02:00
..
2015-09-03 13:03:14 +02:00
2015-07-17 17:01:07 +03:00