unicorn segfaulting on Array.shuffle under ruby 1.9.1

unicorn segfaulting on Array.shuffle under ruby 1.9.1

[Bharanee Rathna]

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 ?

- bharanee
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Re: unicorn segfaulting on Array.shuffle under ruby 1.9.1

[Eric Wong]

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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Re: unicorn segfaulting on Array.shuffle under ruby 1.9.1

[Eric Wong]

Eric Wong <normalperson@yhbt.net> wrote:
> I'll see if I can fix it and follow up with a report to ruby-core/redmine

I managed to report the issue here (and managed to not forget
the attachment, this might be a first)

http://redmine.ruby-lang.org/issues/show/2962

-- 
Eric Wong
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