Bug #12251: DelegateClass(OpenStruct) behavior in 2.3.0 different from 2.2

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]
• Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
• Tags: lib, notbug

[dblock (Daniel Doubrovkine)]

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?

[marcandre (Marc-Andre Lafortune)]

• Related to Bug #12136: OpenStruct.new(format: :bar).send :format # => too few arguments added

[matz (Yukihiro Matsumoto)]

Hmm, it was caused by OpenStruct performance pull-request. Maybe we should revert the PR?

Matz.

[nobu (Nobuyoshi Nakada)]

The pull-request and commit.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed

The OpenStruct changes were reverted starting around e026e186f4a01aa3f6cd02ae6ef33f44f129361c, so you once again get / output for the program.