bug#53136: 28.0.90; segfault in lock_file

[Po Lu]

[Sorry for the webmail, but Yahoo SMTP is wedged; I hope Reply All
worked and this reaches the bug tracker]

> Ugh!

I agree completely.

> Fixing each place individually is a time bomb: no one will remember
> that after enough time has passed, and we will add bugs.

> The only alternative is to filter errno via some macro, which will do
> nothing on all platforms but Haiku, where it will map them to Posix
> values. Butt-ugly, but it's not our fault.

Hmm, perhaps gnulib can do something in this area? Paul, any ideas?
Thanks in advance.