Rails 4.0 has_many inplace modification methods inconsistency

has_many_inplace_methods_bug.rb

# Activate the gem you are reporting the issue against.
gem 'activerecord', '4.0.0'
require 'active_record'
require 'minitest/autorun'
require 'logger'

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts do |t|
  end

  create_table :comments do |t|
    t.integer :post_id
  end
end

class Post < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :post
end

class HasManyInplaceModificationsTest < MiniTest::Unit::TestCase
  def test_has_many_delete_if
    assert_raises NoMethodError do
      Post.create.comments.delete_if{ true } 
    end
  end

  def test_has_many_reject!
    assert_raises NoMethodError do
      Post.create.comments.reject!{ true } 
    end
  end

  def test_has_many_select!
    assert_raises NoMethodError do
      Post.create.comments.select!{ true } 
    end
  end

  def test_has_many_reverse!
    assert_raises NoMethodError do
      Post.create.comments.reverse!{ true } 
    end
  end
  
  #.... and so on
end