From: "zenspider (Ryan Davis)" <redmine@...>
Date: 2012-11-29T09:40:27+09:00
Subject: [ruby-core:50278] [ruby-trunk - Bug #7459] at_exit { Thread.new {} } broken in r37921


Issue #7459 has been updated by zenspider (Ryan Davis).


I don't think main thread should be marked dead until after at_exit is done:

% multiruby -e 'p Thread.current; at_exit { p Thread.current }'

VERSION = mri_trunk
CMD     = ~/.multiruby/install/mri_trunk/bin/ruby -e p Thread.current; at_exit { p Thread.current }

#<Thread:0x007f977c0c8fa8 run>
#<Thread:0x007f977c0c8fa8 dead>

RESULT = 0

VERSION = 1.8.7-p249
CMD     = ~/.multiruby/install/1.8.7-p249/bin/ruby -e p Thread.current; at_exit { p Thread.current }

#<Thread:0x1014e7350 run>
#<Thread:0x1014e7350 run>

RESULT = 0

VERSION = 1.9.2-p320
CMD     = ~/.multiruby/install/1.9.2-p320/bin/ruby -e p Thread.current; at_exit { p Thread.current }

#<Thread:0x007f8ab286b9a8 run>
#<Thread:0x007f8ab286b9a8 run>

RESULT = 0

VERSION = 1.9.3-p194
CMD     = ~/.multiruby/install/1.9.3-p194/bin/ruby -e p Thread.current; at_exit { p Thread.current }

#<Thread:0x007fabc386b5c0 run>
#<Thread:0x007fabc386b5c0 run>

RESULT = 0

TOTAL RESULT = 0 failures out of 4

Passed: 1.9.2-p320, 1.8.7-p249, 1.9.3-p194, mri_trunk
Failed: 

----------------------------------------
Bug #7459: at_exit { Thread.new {} } broken in r37921
https://bugs.ruby-lang.org/issues/7459#change-34105

Author: zenspider (Ryan Davis)
Status: Open
Priority: Urgent
Assignee: 
Category: core
Target version: 2.0.0
ruby -v: 2.0


ruby -e 'p Thread.current; at_exit { p Thread.current; [Thread.new {}].map(&:join) }'

outputs:

#<Thread:0x007feeb28b0fa8 run>
#<Thread:0x007feeb28b0fa8 dead>
-e:1:in `new': can't alloc thread (ThreadError)
	from -e:1:in `block in <main>'

Either the main thread shouldn't be marked as dead until it actually is, or the check in thread_s_new should be expanded to include whatever thread is responsible for the at_exit run.


-- 
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