Bug#801714: [libgtk2.0-0] Parallel build of debian package from source broken when >=4 jobs used

[OmegaPhil]

Package: libgtk2.0-0
Version: 2.24.28-1
Severity: minor

Normally to build packages I use 'dpkg-buildpackage -j8 -i.* -us -uc' as
I have 8 cores available, however doing this causes the build to fail
for this package - seems that different things screw up in different
ways in the documentation generation stage, e.g.:

==========================================================

Error: no ID for constraint linkend: GTK_IM_MODULE_FILE.
Error: no ID for constraint linkend: GTK_PATH.

==========================================================

amongst Note and Warns for '/usr/bin/xsltproc -nonet
http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl
/mnt/storage-1/Programming/C/libgtk2.0-dev/gtk+2.0-2.24.28/docs/reference/gtk/gtk-builder-convert.xml'

-j2 always works, it breaks sometimes for 4 and always for 6+.

Thanks


--- System information. ---
Architecture: amd64
Kernel:       Linux 4.1.0-2-amd64

Debian Release: stretch/sid
  990 testing         www.deb-multimedia.org
  990 testing         10.1.0.3
  500 unstable        10.1.0.3
  500 quodlibet-unstable lazka.github.io
    1 experimental    10.1.0.3

--- Package information. ---
Package's Depends field is empty.

Package's Recommends field is empty.

Package's Suggests field is empty.

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