Issue #11353 has been reported by Naohisa Goto.

----------------------------------------
Bug #11353: ASYNC BUG after failure of Process.exec when closing FD 3 (or 4 or 5)
https://bugs.ruby-lang.org/issues/11353

* Author: Naohisa Goto
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
----------------------------------------
The following shows ASYNC BUG.

~~~
ruby -e 'Process.exec("/does_not_exist", "arg", {3=>:close})'
[ASYNC BUG] -e:1:in `exec': No such file or directory - /does_not_exist (Errno::ENOENT)
	from -e:1:in `<main>'
consume_communication_pipe: read

EBADF

ruby 2.3.0dev (2015-07-10) [x86_64-linux]

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html

Aborted
~~~

Closing FD 4 or 5 also causes ASYNC BUG.




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