[ruby-dev:48569] [ruby-trunk - Bug #10276] [Open] nil/true/false に singleton メソッドを定義できてしまう

[ruby-dev:48569] [ruby-trunk - Bug #10276] [Open] nil/true/false に singleton メソッドを定義できてしまう

[zn]

Issue #10276 has been reported by Kazuhiro NISHIYAMA.

----------------------------------------
Bug #10276: nil/true/false に singleton メソッドを定義できてしまう
https://bugs.ruby-lang.org/issues/10276

* Author: Kazuhiro NISHIYAMA
* Status: Open
* Priority: Normal
* Assignee: 
* Category: core
* Target version: current: 2.2.0
* ruby -v: ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
nil/true/false が frozen object なのに singleton メソッドを定義できてしまいます。

~~~
% cat /tmp/f.rb
def d(o)
  p o.frozen?
  def o.m; end
rescue
  p [o, $!]
end
d(:sym)
d(1)
d(nil)
d(true)
d(false)
d(Object.new.freeze)
% ruby -v /tmp/f.rb
ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
true
[:sym, #<TypeError: can't define singleton>]
true
[1, #<TypeError: can't define singleton>]
true
true
true
true
[#<Object:0x00000002706730>, #<RuntimeError: can't modify frozen object>]
~~~



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

[ruby-dev:48580] [ruby-trunk - Bug #10276] nil/true/false に singleton メソッドを定義できてしまう

[zn]

Issue #10276 has been updated by Kazuhiro NISHIYAMA.


frozen なオブジェクトに特異クラスが作成できるかどうかも統一されていないようですが、そういうものなのでしょうか?

~~~
>> RUBY_DESCRIPTION
=> "ruby 2.2.0dev (2014-09-25 trunk 47711) [x86_64-linux]"
>> class << :sym; end
TypeError: can't define singleton
        from (irb):2
        from /home/kazu/.rbenv/versions/git/bin/irb:11:in `<main>'
>> class << 1; end
TypeError: can't define singleton
        from (irb):3
        from /home/kazu/.rbenv/versions/git/bin/irb:11:in `<main>'
>> class << nil; end
=> nil
>> class << Object.new.freeze; end
=> nil
>>
~~~

----------------------------------------
Bug #10276: nil/true/false に singleton メソッドを定義できてしまう
https://bugs.ruby-lang.org/issues/10276#change-49113

* Author: Kazuhiro NISHIYAMA
* Status: Open
* Priority: Normal
* Assignee: 
* Category: core
* Target version: current: 2.2.0
* ruby -v: ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
nil/true/false が frozen object なのに singleton メソッドを定義できてしまいます。

~~~
% cat /tmp/f.rb
def d(o)
  p o.frozen?
  def o.m; end
rescue
  p [o, $!]
end
d(:sym)
d(1)
d(nil)
d(true)
d(false)
d(Object.new.freeze)
% ruby -v /tmp/f.rb
ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
true
[:sym, #<TypeError: can't define singleton>]
true
[1, #<TypeError: can't define singleton>]
true
true
true
true
[#<Object:0x00000002706730>, #<RuntimeError: can't modify frozen object>]
~~~



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

[ruby-dev:48620] [ruby-trunk - Bug #10276] [Feedback] nil/true/false に singleton メソッドを定義できてしまう

[akr]

Issue #10276 has been updated by Akira Tanaka.

Status changed from Open to Feedback

開発者会議のときに、奇妙だがそういうものとしようということになった覚えがあります。

----------------------------------------
Bug #10276: nil/true/false に singleton メソッドを定義できてしまう
https://bugs.ruby-lang.org/issues/10276#change-49375

* Author: Kazuhiro NISHIYAMA
* Status: Feedback
* Priority: Normal
* Assignee: 
* Category: core
* Target version: current: 2.2.0
* ruby -v: ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
nil/true/false が frozen object なのに singleton メソッドを定義できてしまいます。

~~~
% cat /tmp/f.rb
def d(o)
  p o.frozen?
  def o.m; end
rescue
  p [o, $!]
end
d(:sym)
d(1)
d(nil)
d(true)
d(false)
d(Object.new.freeze)
% ruby -v /tmp/f.rb
ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
true
[:sym, #<TypeError: can't define singleton>]
true
[1, #<TypeError: can't define singleton>]
true
true
true
true
[#<Object:0x00000002706730>, #<RuntimeError: can't modify frozen object>]
~~~



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

[ruby-dev:49860] [Ruby trunk Bug#10276][Rejected] nil/true/false に singleton メソッドを定義できてしまう

[akr]

Issue #10276 has been updated by Akira Tanaka.

Status changed from Feedback to Rejected

----------------------------------------
Bug #10276: nil/true/false に singleton メソッドを定義できてしまう
https://bugs.ruby-lang.org/issues/10276#change-61346

* Author: Kazuhiro NISHIYAMA
* Status: Rejected
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
nil/true/false が frozen object なのに singleton メソッドを定義できてしまいます。

~~~
% cat /tmp/f.rb
def d(o)
  p o.frozen?
  def o.m; end
rescue
  p [o, $!]
end
d(:sym)
d(1)
d(nil)
d(true)
d(false)
d(Object.new.freeze)
% ruby -v /tmp/f.rb
ruby 2.2.0dev (2014-09-21 trunk 47672) [x86_64-linux]
true
[:sym, #<TypeError: can't define singleton>]
true
[1, #<TypeError: can't define singleton>]
true
true
true
true
[#<Object:0x00000002706730>, #<RuntimeError: can't modify frozen object>]
~~~



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