Setting: The current user is in the "wheel" group and doesn't run a polkit authentication agent, e.g. because they killed it (it usually runs as the current user) or use a desktop environment/window manager like i3 which didn't start one in the first place.

Bug: A command like "gedit admin:///etc/sudoers"; allows to edit the sudoers file without prompting for a password.

Expected behaviour: Before editing the file, it should ask for the user's password.

This was reported upstream as https://gitlab.gnome.org/GNOME/gvfs/issues/355 and fixed by https://gitlab.gnome.org/GNOME/gvfs/merge_requests/31. It was also backported to gvfs 1.38, so building an updated package based on commit e4eec2bc863e85e2b6b47e4d1c3bdd90ab36dc93 (from the branch https://gitlab.gnome.org/GNOME/gvfs/tree/gnome-3-30) will contain the fix.

Additional info:
* gvfs 1.38.1-1

Steps to reproduce:
- Login as a user in the "wheel" group.
- Install gvfs and gedit.
- Kill your current polkit authentication agent, e.g. /usr/lib/polkit-gnome/polkit-gnome-authentication-agent-1, or use a window manager like i3 which doesn't start one by default.
- Run "gedit admin:///etc/sudoers";.
- Observe that the file is editable without a password prompt.