Issue #9865 has been updated by Usaku NAKAMURA.
Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN to 2.0.0: REQUIRED,
2.1: REQUIRED
Bug #9865: frozen IO object causes RuntimeError with inspect and fileno
- Author: Akira T.
- 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: REQUIRED, 2.1: REQUIRED
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?