Taylor Venable <taylor@metasyntax.net> writes:

> Another thing is that 'ls -ab' is run at some point, but the '-b'
> option isn't available on OpenBSD's ls.  Perhaps neither one of these
> is directly the cause, but they seem like they may be red flags to me.

That might be the problem, because it happens exactly at the place where
Tramp runs into trouble.

Could you, please, check whether the appended patch helps?

Best regards, Michael.