Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
===============================================================================
Failure: test_self_dump(TestRDocRIDriver):
  </:class_methods/> was expected to be =~
  <"{ancestors:\n" +
  "  {\"Foo\" => [\"Inc\", \"Object\"],\n" +
  "   \"Ambiguous\" => [\"Object\"],\n" +
  "   \"Foo::Bar\" => [\"Object\"],\n" +
  "   \"Foo::Baz\" => [\"Object\"],\n" +
  "   \"Qux\" => [\"Object\"]},\n" +
  " attributes: {\"Foo::Bar\" => [\"attr_accessor attr\"]},\n" +
  " class_methods: {\"Foo::Bar\" => [\"new\"]},\n" +
  " c_class_variables: {},\n" +
  " c_singleton_class_variables: {},\n" +
  " encoding: nil,\n" +
  " instance_methods:\n" +
  "  {\"Foo\" => [\"inherit\", \"override\"],\n" +
  "   \"Foo::Bar\" => [\"attr\", \"blah\", \"bother\"],\n" +
  "   \"Qux\" => [\"aliased\", \"original\"]},\n" +
  " main: nil,\n" +
  " modules: [\"Ambiguous\", \"Ext\", \"Foo\", \"Foo::Bar\", \"Foo::Baz\", \"Inc\", \"Qux\"],\n" +
  " pages: [\"README.rdoc\"],\n" +
  " title: nil}\n">.
/builddir/build/BUILD/rubygem-rdoc-6.4.0-build/rdoc-6.4.0/usr/share/gems/gems/rdoc-6.4.0/test/rdoc/test_rdoc_ri_driver.rb:57:in 'TestRDocRIDriver#test_self_dump'
     54:       RDoc::RI::Driver.dump @store1.cache_path
     55:     end
     56: 
  => 57:     assert_match %r%:class_methods%,    out
     58:     assert_match %r%:modules%,          out
     59:     assert_match %r%:instance_methods%, out
     60:     assert_match %r%:ancestors%,        out
===============================================================================
: (0.009597)
Failed test case