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

[Mark Hindley <leepen@debian.org>]

Package: xorg-server
Version: 21.1.14-2
Severity: serious
Tags: ftbfs
Justification: FTBFS

Dear Timo and Simon,

In version 21.1.14-2 of src:xorg-server, the new compile time Xvfb check fails
in a pbuilder/cowbuilder chroot:

sudo cowbuilder --build --basepath /var/cache/pbuilder/base-sid.cow/ xorg-server_21.1.14-2.dsc

[...]

make[1]: Entering directory '/build/xorg-server-21.1.14'
dh_auto_test -- -j1 VERBOSE=1
# Check basic functionality of Xvfb
PATH="debian/build/main/hw/vfb:$PATH" sh debian/local/xvfb-run -a -e /proc/self/fd/2 -s -noreset xdpyinfo
debian/local/xvfb-run: 159: cannot create /proc/self/fd/2: Permission denied
debian/local/xvfb-run: 82: cannot create /proc/self/fd/2: Permission denied
make[1]: *** [debian/rules:50: override_dh_auto_test] Error 2
make[1]: Leaving directory '/build/xorg-server-21.1.14'
make: *** [debian/rules:12: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
I: copying local configuration
E: Failed autobuilding of package

Since I cannot see any issues on the buildd, I assume it is triggered by the
pbuilder/cowbuilder chroot.

Mark

-- System Information:
Debian Release: 12.8
merged-usr: no
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-26-amd64 (SMP w/2 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /bin/dash
Init: OpenRC (via /run/openrc), PID 1: init