[Bug 520907] [NEW] Presence of libnokogiri-ruby1.8 breaks many gems - symptom "Nokogiri was built against LibXML version 2.6.32, but has dynamically loaded 2.7.5"

[Andreas Krüger]

Public bug reported:

Binary package hint: rubygems1.8

Summary:

Quite a few gems depend on the nokogiri gem. The nokogiri gem does not
work when package libnokogiri-ruby1.8 is also installed on the system.
So I suggest that rubygems1.8 should have, in its deb dependency
information, a conflict with libnokogiri-ruby1.8.

Details:

The nokogiri gem seems to install fine, and does provide some
functionality. But is broken when libnokogiri-ruby1.8 is also installed.
See http://github.com/tenderlove/nokogiri/issues/issue/217 for details.

The underlying problem: Nokogiri has two parts, a library nokogiri.so
and ruby code. Now libnokogiri-ruby1.8 provides a second, older version
of nokogiri.so. When libnokogiri-ruby1.8 is installed, the gem's new
ruby code gets mixed up with the older libnokogiri-ruby1.8 library. This
causes bugs.

Quite a few gems depend on the nokogiri gem as a prerequisite. So the
presence of libnokogiri-ruby1.8 breaks a substantial part of the gem
system as a whole. Therefore I suggest a conflict between rubygems1.8
and libnokogiri-ruby1.8 should be introduced in the rubygems1.8 .deb
dependency information.

The same problem may also be present for ruby 1.9 as well. This I did
not investigate.

Best regards, and thank you for providing and maintaining fine software,

Andreas

ProblemType: Bug
Architecture: i386
Date: Fri Feb 12 11:15:11 2010
DistroRelease: Ubuntu 9.10
Package: rubygems1.8 1.3.5-1ubuntu2
PackageArchitecture: all
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
SourcePackage: libgems-ruby
Uname: Linux 2.6.31-19-generic i686

** Affects: libgems-ruby (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386

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Presence of libnokogiri-ruby1.8 breaks many gems - symptom "Nokogiri was built against LibXML version 2.6.32, but has dynamically loaded 2.7.5"
https://bugs.launchpad.net/bugs/520907
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