Bug#1087418: src:xorg-server FTBFS: Xvfb compile time check fails in pbuilder/cowbuilder chroot

[Simon McVittie <smcv@debian.org>]

On Wed, 13 Nov 2024 at 10:55:59 +0000, Jessica Clarke wrote:
> [pbuilder? has] mounted /proc for quite a few years now similarly to how schroot
> recently started to, but /proc/*/fd/N has always been a little broken.
> Isn’t that also true of schroot though? I seem to recall observing the
> same thing there when testing the new schroot code recently.

All I can say is that when I tested the xorg-server change, it built
successfully in the bookworm versions of sbuild/schroot, in a bookworm VM.

One possibility is that sbuild/schroot might make stderr a pipe, which can
be reopened via /proc/self/fd/2; but pbuilder might make it an open fd
to a log file owned by some other uid, which might not be reopenable?
Or something like that?

    smcv