[Chicken-users] bug or usage problem with posix group-information and there is no change-group?

[Matt Welland]

In the repl calling group-information with the string name of a group
works fine, in compiled code I get an error, expected fixnum but
received string. I tested with Chicken 4.13

Also I see a change-file-owner but no change-file-group. A change-file-
group would be useful as you can change the group without being root.
I.e. an analog to the chgrp command would be useful.