1 files changed, 5 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/core_ext/load_error.rb b/activesupport/lib/active_support/core_ext/load_error.rb
index 42f2d42e78..a04c4215d4 100644
--- a/activesupport/lib/active_support/core_ext/load_error.rb
+++ b/activesupport/lib/active_support/core_ext/load_error.rb
@@ -4,6 +4,10 @@ class MissingSourceFile < LoadError
     super(message)
     @path = path
   end
+
+  def is_missing?(path)
+    path.gsub(/\.rb$/, '') == self.path.gsub(/\.rb$/, '')
+  end
   
   def self.from_message(message)
     REGEXPS.each do |regexp, capture|
@@ -31,4 +35,4 @@ module ActiveSupport
       ::LoadError.extend(LoadErrorClassMethods)
     end
   end
-end
-\ No newline at end of file
+end