Issue #12413 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED to 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE

ruby_2_3 r55405 merged revision(s) 55120.

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Bug #12413: Dir#close does not raise IOError on already closed handle on OS X
https://bugs.ruby-lang.org/issues/12413#change-59211

* Author: Daniel Berger
* Status: Closed
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15]
* Backport: 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE
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The docs for Dir#close say "Closes the directory stream. Any further attempts to access dir will raise an IOError."

    dir = Dir.new(Dir.pwd)
    dir.close # nil

Here, I would expect another call to dir to raise an IOError, but it doesn't. On OS X it just returns nil.

    dir.close # nil again (and again)

Whereas on both Linux and Windows I get the expected error:

    IOError: closed directory



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