Bug #12738: Array#flattenで特異クラスが引き継がれる

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.4.0dev (2016-09-08 master 56109) [x86_64-linux]
• Backport: 2.1: UNKNOWN, 2.2: DONE, 2.3: DONE

[ktsj (Kazuki Tsujimoto)]

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。

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

[ktsj (Kazuki Tsujimoto)]

• Status changed from Open to Closed

Applied in changeset r56111.

---

• array.c (flatten): use rb_obj_class instead of rb_class_of
  because rb_class_of may return a singleton class.
  [ruby-dev:49781] [Bug #12738]

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.1: UNKNOWN, 2.2: REQUIRED, 2.3: REQUIRED to 2.1: UNKNOWN, 2.2: REQUIRED, 2.3: DONE

ruby_2_3 r56233 merged revision(s) 56111.

[usa (Usaku NAKAMURA)]

• Backport changed from 2.1: UNKNOWN, 2.2: REQUIRED, 2.3: DONE to 2.1: UNKNOWN, 2.2: DONE, 2.3: DONE

ruby_2_2 r56305 merged revision(s) 56111.