From: kazuki@...
Date: 2016-09-08T08:51:25+00:00
Subject: [ruby-dev:49781] [Ruby trunk Bug#12738] Array#flattenで特異クラスが引き継がれる

Issue #12738 has been reported by Kazuki Tsujimoto.

----------------------------------------
Bug #12738: Array#flattenで特異クラスが引き継がれる
https://bugs.ruby-lang.org/issues/12738

* Author: Kazuki Tsujimoto
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.4.0dev (2016-09-08 master 56109) [x86_64-linux]
* Backport: 2.1: UNKNOWN, 2.2: REQUIRED, 2.3: REQUIRED
----------------------------------------
Array#flattenで生成されたオブジェクトがflattenのレシーバと特異クラスを共有してしまっています。

~~~ruby
a = []
class << a
  def m; :m; end
end
p a.flatten.m #=> :m
~~~




-- 
https://bugs.ruby-lang.org/