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From: Eric Wong <normalperson@yhbt.net>
Newsgroups: gmane.comp.lang.ruby.unicorn.general
Subject: Re: unicorn segfaulting on Array.shuffle under ruby 1.9.1
Date: Sun, 14 Mar 2010 23:53:57 +0000
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Cc: Bharanee Rathna <deepfryed@gmail.com>
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Bharanee Rathna <deepfryed@gmail.com> wrote:
> Hi Guys,
> 
> http://gist.github.com/332266
> 
> results in a segfault when run under unicorn.  It seems to be fine
> with webrick or thin. Any ideas ?

Hi Bharanee, it looks like the random number generator needs to be
reinitialized after fork()...

Try putting "rand" anywhere before shuffle, you can reproduce
it below even without Unicorn:

------------------- 8< ----------------
pid = fork do
  rand # removing this will segfault
  (1..10).to_a.shuffle
end
p Process.waitpid2(pid)
------------------- 8< ----------------

I'll see if I can fix it and follow up with a report to ruby-core/redmine

-- 
Eric Wong
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