Issue #9835 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 r46575.

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Bug #9835: IGNORE signal handler has possible race condition in Ruby 2.1.2
https://bugs.ruby-lang.org/issues/9835#change-47406

* Author: Kyle Smith
* Status: Closed
* Priority: Low
* Assignee: 
* Category: core
* Target version: 
* ruby -v: ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
* Backport: 2.0.0: DONE, 2.1: DONE
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I'm migrating an application from 1.8.7 to 2.1.1/2.1.2, so I'm not sure when this was introduced.  Attached is a demo program with some notes about how the IGNORE option to Signal.trap seems to have a race condition whereby receiving that signal shortly after that call, it raises a SignalException with the message including only the name of the signal it received.  However, if you trap the signal with an empty block, that race does not occur.

I've tested the attached program on 1.8.7 (no issue), 2.1.1 (issue) and 2.1.2 (issue) on a Linux system (Ubuntu lucid).


---Files--------------------------------
test.rb (1.37 KB)


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