Error during loading of aws-s3 gem

[alanjackson]

Hi
We have encountered an issue in our project which manifests itself during the starting of the rails server.
Within the s3.rb file, the require_library_or_gem 'xml/libxml' succeeds but the XML::Parser is not defined raising a NameError on what is currently line 54
This appears to happen as a result of our use of the savon gem.

We have validated this in our test project that just uses the aws-s3 gem and this works fine (the require_library_or_gem call fails and thus falls back to XmlSimple)
In our main project, other work brings in the savon gem and the problem is seen
Modifying our test project to require the savon gem then exhibits the problem.
Removing the require from our Gemfile removes the problem.