INITGROUPS fails on GIDs > 2147483647

[max-privatevoid]

Originally reported in a fork.

User max is member of a group with GID 2709991565. Running id max, nsncd (unstable-2022-11-14 from nixpkgs 96f8f4a038a190f7511da79ef7e77bec5e4b811a) returns:

uid=646000001(max) gid=646000001(max) groups=646000001

nscd returns:

uid=646000001(max) gid=646000001(max) groups=646000001(max),2709991565(infra_admins)

Log for nsncd shows this error message:

Jun 11 00:00:39.334 ERRO error handling request, err: out of range integral type conversion attempted, request_type: INITGROUPS, thread: worker_5

Users with GIDs <= 2147483647 get their groups listed correctly, so I'm guessing this is a signed vs. unsigned issue.