[ruby-core:105338] [Ruby master Bug#17661] IO#each will segfault when if file is closed inside an `each_byte` block

Issue #17661 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.6: UNKNOWN, 2.7: REQUIRED, 3.0: REQUIRED to 2.6: UNKNOWN, 2.7: REQUIRED, 3.0: DONE

ruby_3_0 e6e25b794d8db52e1df85a02f28846ad7eb82d49 merged revision(s) 13939d61b4b69bd109c5f41303c79868d639fa44.

----------------------------------------
Bug #17661: IO#each will segfault when if file is closed inside an `each_byte` block
https://bugs.ruby-lang.org/issues/17661#change-93752

* Author: tenderlovemaking (Aaron Patterson)
* Status: Closed
* Priority: Normal
* Backport: 2.6: UNKNOWN, 2.7: REQUIRED, 3.0: DONE
----------------------------------------
As reported here: https://twitter.com/asterite/status/1363487990203506689 when iterating through a file's contents with #each_byte, if the filehandle is closed inside of the block yielded to by #each byte, this condition is not detected, and a segmentation fault is thrown.

Repro:

```ruby
file = http://File.open(__FILE__)
file.each_byte do |byte|
  p byte
  file.close
end
```

Proposed fix is here: https://github.com/ruby/ruby/pull/4217



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

Unsubscribe: <mailto:[e-mail]?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>