Bug #3561: ruby-1.9.3-r28570 test/unit gem activation failure
http://redmine.ruby-lang.org/issues/show/3561

Author: Sam Ruby
Status: Open, Priority: Normal
Category: core
ruby -v: ruby 1.9.3dev (2010-07-07 trunk 28570) [x86_64-linux]

Testcase:

  require 'rubygems'
  require 'test/unit'
  require 'test/unit/ui/console/testrunner'

This worked prior to http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=28570

Starting with r28570, it produces:

/home/rubys/.rvm/gems/ruby-1.9.3-r28570/gems/test-unit-2.0.9/lib/test/unit/ui/console/testrunner.rb:331:in `<module:Console>': uninitialized constant Test::Unit::UI::Console::Diff (NameError)
	from /home/rubys/.rvm/gems/ruby-1.9.3-r28570/gems/test-unit-2.0.9/lib/test/unit/ui/console/testrunner.rb:17:in `<module:UI>'
	from /home/rubys/.rvm/gems/ruby-1.9.3-r28570/gems/test-unit-2.0.9/lib/test/unit/ui/console/testrunner.rb:16:in `<module:Unit>'
	from /home/rubys/.rvm/gems/ruby-1.9.3-r28570/gems/test-unit-2.0.9/lib/test/unit/ui/console/testrunner.rb:15:in `<module:Test>'
	from /home/rubys/.rvm/gems/ruby-1.9.3-r28570/gems/test-unit-2.0.9/lib/test/unit/ui/console/testrunner.rb:14:in `<top (required)>'
	from /home/rubys/.rvm/rubies/ruby-1.9.3-r28570/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
	from /home/rubys/.rvm/rubies/ruby-1.9.3-r28570/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `rescue in require'
	from /home/rubys/.rvm/rubies/ruby-1.9.3-r28570/lib/ruby/1.9.1/rubygems/custom_require.rb:31:in `require'
	from test0.rb:3:in `<main>'


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