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-rw-r--r--activesupport/lib/active_support/core_ext/object/extending.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/extending.rb b/activesupport/lib/active_support/core_ext/object/extending.rb
index 16f62d85b7..e15b4bf385 100644
--- a/activesupport/lib/active_support/core_ext/object/extending.rb
+++ b/activesupport/lib/active_support/core_ext/object/extending.rb
@@ -9,7 +9,6 @@ class Object #:nodoc:
next if # Exclude this class if
(k.ancestors & superclasses).empty? || # It's not a subclass of our supers
superclasses.include?(k) || # It *is* one of the supers
- subclasses.include?(k) || # We already have it for some obscure reason
eval("! defined?(::#{k})") || # It's not defined.
eval("::#{k}").object_id != k.object_id
subclasses << k