Arch Linux

colord version: 1.2.12-1

When installing the package colord, a user with the same name is created with the home
directory /var/lib/colord(https://projects.archlinux.org/svntogit/packages.git/tree/trunk/colord.install?h=packages/colord).

However, when your uninstall the package, the colord user is not removed. The shadow.service then
fails because the home directory doesn't exist anymore but the user still exists.

Steps to reproduce:
1. Install the colord package
2. Uninstall the colord package
3. start the shadow service

Logs:
Sep 04 20:57:31 tx220 systemd[1]: Starting Verify integrity of password and group files...
Sep 04 20:57:31 tx220 pwck[17070]: user 'colord': directory '/var/lib/colord' does not exist
Sep 04 20:57:31 tx220 pwck[17070]: pwck: no changes
Sep 04 20:57:31 tx220 systemd[1]: shadow.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Sep 04 20:57:31 tx220 systemd[1]: Failed to start Verify integrity of password and group files.
Sep 04 20:57:31 tx220 systemd[1]: shadow.service: Unit entered failed state.
Sep 04 20:57:31 tx220 systemd[1]: shadow.service: Failed with result 'exit-code'.

Potential fix
Delete the colord user in the post_remove hook
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