[rubygems/rubygems] Fix duplicated specs when they have been previously activated

https://github.com/rubygems/rubygems/commit/b44bf2ac74

lib/rubygems/specification_record.rb

@@ -30,7 +30,7 @@ module Gem
     # Returns the list of all specifications in the record
 
     def all
-      @all ||= Gem.loaded_specs.values + stubs.map(&:to_spec)
+      @all ||= stubs.map(&:to_spec)
     end
 
     ##

test/rubygems/test_gem.rb

@@ -1026,6 +1026,20 @@ class TestGem < Gem::TestCase
     Gem.refresh
   end
 
+  def test_activated_specs_does_not_cause_duplicates_when_looping_through_specs
+    util_make_gems
+
+    s = Gem::Specification.first
+    s.activate
+
+    Gem.refresh
+
+    assert_equal 1, Gem::Specification.count {|spec| spec.full_name == s.full_name }
+
+    Gem.loaded_specs.delete(s)
+    Gem.refresh
+  end
+
   def test_self_ruby_escaping_spaces_in_path
     with_clean_path_to_ruby do
       with_rb_config_ruby("C:/Ruby 1.8/bin/ruby.exe") do