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-rw-r--r--activesupport/lib/active_support/core_ext/class/attribute.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/core_ext/class/attribute.rb b/activesupport/lib/active_support/core_ext/class/attribute.rb
index 45bec264ff..305ed4964b 100644
--- a/activesupport/lib/active_support/core_ext/class/attribute.rb
+++ b/activesupport/lib/active_support/core_ext/class/attribute.rb
@@ -110,6 +110,6 @@ class Class
private
def singleton_class?
- !name || '' == name
+ ancestors.first != self
end
end