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When running "sshd -T" you get the following error, which is not handled correctly.  This only happens if you have a match statement in your /etc/ssh/sshd_config file

# sshd -T
'Match User' in configuration but 'user' not in connection test specification

This has been reported on OpenBSD 6.2 as well:

https://bugzilla.mindrot.org/show_bug.cgi?id=2858

Thank you for the bug report. It is certainly something useful to have and we will consider it with the next update (unless it has some higher impact on you/customer).

Can we have a test build for the patch. One of my customer want to test it.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: openssh security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:4368