Bug#787577: produces broken documentation: Invalid namespace '' at line 3, column 1

[Michael Biebl]

Package: gtk-doc-tools
Version: 1.23-1
Severity: grave

Since upgrading to 1.23, every package which has been rebuilt with that
version fails to show up in devhelp:

(devhelp:31032): Devhelp-WARNING **: Failed to read '/usr/share/gtk-doc/html/libudev/libudev.devhelp2': Invalid namespace '' at line 3, column 1

(devhelp:31032): Devhelp-WARNING **: Failed to read '/usr/share/gtk-doc/html/gtkspell3/gtkspell3.devhelp2': Invalid namespace '' at line 3, column 1

(devhelp:31032): Devhelp-WARNING **: Failed to read '/usr/share/gtk-doc/html/gudev/gudev.devhelp2': Invalid namespace '' at line 3, column 1

(devhelp:31032): Devhelp-WARNING **: Failed to read '/usr/share/gtk-doc/html/gnome-desktop3/gnome-desktop3.devhelp2': Invalid namespace '' at line 3, column 1



-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gtk-doc-tools depends on:
ii  docbook-dsssl   1.79-7
ii  docbook-to-man  1:2.0.0-32
ii  docbook-xml     4.5-7.2
ii  docbook-xsl     1.78.1+dfsg-1
ii  gnome-common    3.14.0-1
ii  highlight       3.18-3
ii  jade            1.2.1-47.3
ii  perl            5.20.2-6
ii  python          2.7.9-1
ii  xsltproc        1.1.28-2+b2

Versions of packages gtk-doc-tools recommends:
ii  pkg-config  0.28-1

Versions of packages gtk-doc-tools suggests:
pn  dblatex  <none>

-- no debconf information