[xml/sgml-pkgs] Bug#766884: libxml2: lots of "validity error : ID ... already defined" errors with xmllint --valid

[Vincent Lefevre]

Package: libxml2
Version: 2.9.2+dfsg1-1
Severity: grave
Justification: renders package unusable

A major regression: when I use the --valid xmllint option, I get lots
of "validity error : ID ... already defined" errors.

If you can't reproduce the error, I'll try to provide a simple testcase
(my files are huge).

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libxml2 depends on:
ii  libc6              2.19-12
ii  liblzma5           5.1.1alpha+20120614-2
ii  multiarch-support  2.19-12
ii  zlib1g             1:1.2.8.dfsg-2

Versions of packages libxml2 recommends:
ii  xml-core  0.13+nmu2

libxml2 suggests no packages.

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