Issue #12251 has been updated by matz (Yukihiro Matsumoto). Hmm, it was caused by OpenStruct performance pull-request. Maybe we should revert the PR? Matz. ---------------------------------------- Bug #12251: DelegateClass(OpenStruct) behavior in 2.3.0 different from 2.2 https://bugs.ruby-lang.org/issues/12251#change-84404 * Author: dblock (Daniel Doubrovkine) * Status: Open * Priority: Normal * ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15] * Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN ---------------------------------------- This came from https://github.com/ruby-grape/grape/issues/1348 ~~~ require 'delegate' require 'ostruct' class AttributeTranslator < DelegateClass(OpenStruct) def initialize(attributes = {}) ostruct = OpenStruct.new(attributes) super ostruct end end def namespace 'foobar' end instance = AttributeTranslator.new(namespace: '/') puts instance.namespace ~~~ Ruby 2.2.1 => '/' Ruby 2.3.0 => 'foobar' Halp? -- https://bugs.ruby-lang.org/ Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>