[rubygems/rubygems] Also disambiguate gems not in the first Gem.path position

7e6e7ccc58

lib/rubygems/basic_specification.rb

@@ -105,6 +105,13 @@ class Gem::BasicSpecification
     default_gem? ? 1 : -1
   end
 
+  ##
+  # Gems higher up in +gem_path+ take precedence
+
+  def base_dir_priority(gem_path)
+    gem_path.index(base_dir) || gem_path.size
+  end
+
   ##
   # Returns full path to the directory where gem's extensions are installed.