From: "jleo3 (Joe Leo)" <joseph.leo3@...>
Date: 2013-01-14T01:00:14+09:00
Subject: [ruby-core:51406] [ruby-trunk - Bug #7648] GServer does not close cleanly from signal interrupt context


Issue #7648 has been updated by jleo3 (Joe Leo).


Confirming that this is still an issue on RC1: 

ruby -v
ruby 2.0.0dev (2013-01-07 trunk 38733) [i686-linux]


/home/joe/lib/lib/ruby/2.0.0/gserver.rb:116:in `synchronize': can't be called from trap context (ThreadError)
	from /home/joe/lib/lib/ruby/2.0.0/gserver.rb:116:in `stop'
	from /home/joe/dev/bane/lib/bane/launcher.rb:19:in `block in stop'
	from /home/joe/dev/bane/lib/bane/launcher.rb:19:in `each'
	from /home/joe/dev/bane/lib/bane/launcher.rb:19:in `stop'
	from ./bin/bane:22:in `block in <main>'
	from /home/joe/lib/lib/ruby/2.0.0/gserver.rb:140:in `call'
	from /home/joe/lib/lib/ruby/2.0.0/gserver.rb:140:in `join'
	from /home/joe/lib/lib/ruby/2.0.0/gserver.rb:140:in `join'
	from /home/joe/dev/bane/lib/bane/launcher.rb:15:in `block in join'
	from /home/joe/dev/bane/lib/bane/launcher.rb:15:in `each'
	from /home/joe/dev/bane/lib/bane/launcher.rb:15:in `join'
	from ./bin/bane:23:in `<main>'


----------------------------------------
Bug #7648: GServer does not close cleanly from signal interrupt context
https://bugs.ruby-lang.org/issues/7648#change-35384

Author: jleo3 (Joe Leo)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2013-01-02 trunk 38676) [i686-linux]


SUMMARY:
When a signal interrupt is trapped, we can no longer call #close on GServer without it throwing a ThreadError. 

STEPS TO REPEAT:
1) Run the following code:

    require 'gserver'

    server = GServer.new 8080
    server.start
    trap("SIGINT") { server.stop }
    gets # or any command that keeps the process running

2) Hit CTRL+C or whichever command will send the interrupt signal to this program. 

WHAT I EXPECTED: In version 1.9.3, CTRL+C sends an interrupt signal and the program exits cleanly. 

WHAT HAPPENED: When running the version from trunk the following stack trace is thrown. 

^C/home/joe/.rvm/rubies/ruby-head/lib/ruby/2.0.0/gserver.rb:116:in `synchronize': can't be called from trap context (ThreadError)
	from /home/joe/.rvm/rubies/ruby-head/lib/ruby/2.0.0/gserver.rb:116:in `stop'
	from gserver_bug.rb:5:in `block in <main>'
	from gserver_bug.rb:6:in `call'
	from gserver_bug.rb:6:in `gets'
	from gserver_bug.rb:6:in `gets'
	from gserver_bug.rb:6:in `<main>'

POSSIBLY RELEVANT: https://bugs.ruby-lang.org/issues/6416

NOTE: This was tried with AND without RVM with the same results.


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