Issue #9865 has been updated by Usaku NAKAMURA.
Backport changed from 2.0.0: REQUIRED, 2.1: DONE to 2.0.0: DONE, 2.1: DONE
backported into `ruby_2_0_0` at r37368.
note: respect existing security checks on this version.
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Bug #9865: frozen IO object causes RuntimeError with inspect and fileno
https://bugs.ruby-lang.org/issues/9865#change-48618
* Author: Akira Tanaka
* Status: Closed
* Priority: Normal
* Assignee:
* Category:
* Target version:
* ruby -v: ruby 2.2.0dev (2014-05-27 trunk 46150) [x86_64-linux]
* Backport: 2.0.0: DONE, 2.1: DONE
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IO object を freeze すると、inspect や fileno が RuntimeError になるんですが、
これはよろしくないんじゃないかと思います。
```
% ./ruby -e 'f = open("."); f.freeze; p f'
-e:1:in `inspect': can't modify frozen File (RuntimeError)
from -e:1:in `p'
from -e:1:in `<main>'
% ./ruby -e 'f = open("."); f.freeze; p f.fileno'
-e:1:in `fileno': can't modify frozen File (RuntimeError)
from -e:1:in `<main>'
% ./ruby -v
ruby 2.2.0dev (2014-05-27 trunk 46150) [x86_64-linux]
```
あるいは、なにか理由がありましたっけ?
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