From: Nobuyoshi@..., Nakada@...
Date: 2014-01-11T03:50:37+00:00
Subject: [ruby-core:59692] [ruby-trunk - Bug #9393] (Closed) Strange behavior of DelegateClass + loop + method_missing

������������ #9393 ��� Nobuyoshi Nakada ������������������������������������

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��������������� ��� Open ������ Closed ���������

Correct behavior.
`loop` is also delegated to the target object now.


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Bug #9393: Strange behavior of DelegateClass + loop + method_missing
https://bugs.ruby-lang.org/issues/9393#change-44215

* ���������: Pavel Forkert
* ���������������: Closed
* ���������: Normal
* ���������: 
* ������������: 
* ���������������������: 
* ruby -v: 2.1.0-p0
* Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
Having the following class in Ruby 2.1:

```
require 'delegate'

class A < DelegateClass(Hash)
  def a
    loop do
      ::Kernel.p 'A'
      break
    end
  end
end
```

After calling `A.new({}).a` the output is "A".

However if `method_missing` is added to the class:

```
class A < DelegateClass(Hash)
  def a
    loop do
      ::Kernel.p 'A'
      break
    end
  end

  def method_missing(method, *args, &block)
    ::Kernel.p method
  end
end
```

Then after calling `A.new({}).a`, the output is somewhat unexpected: `:loop`. That actually means that `:loop` method cannot be found and the block within the loop will not run. Is that the right behavior?

Ruby 2.0 returns "A" in both cases.




-- 
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