From: KOSAKI Motohiro <kosaki.motohiro@...>
Date: 2011-07-08T10:24:51+09:00
Subject: [ruby-core:37860] Re: [ruby-core:37859] [Ruby 1.9 - Bug #4992] finalizer中のThread.newでSEGV

> -- Thread.new in finalizer raises SEGV
>
> The following code raises SEGV sometimes:
>
> $ ruby -e'ObjectSpace.define_finalizer(""){Thread.new{}}'
> $ ruby -e'ObjectSpace.define_finalizer(""){Thread.new{}}'
> SEGV received in SEGV handler

I think Thread.new in finalizer should raise argument error.
IOW, we shouldn't allow to create new thread in finalizer.
It's disaster. just my 2 cent.