From: Robert Dober <robert.dober@...>
Date: 2008-07-03T19:29:16+09:00
Subject: Re: is it normal to be kicked out of irb?

On Thu, Jul 3, 2008 at 6:15 AM, Emmanuel Oga <emmanueloga@gmail.com> wrote:
> Is it normal to be kicked off of irb when a Fatal error occurs ? I was
> kicked of of it while testing this (kicked off != code halt with an
> exception):
>
> $ irb
> irb(main):001:0> def is_prime?(n); ("1" * n) !~ /^1?$|^(11+?)\1+$/ ;
> rescue NoMemoryError; puts "ouch"; end
> => nil
> irb(main):002:0> is_prime?(2)
> => true
> irb(main):005:0> is_prime?(100000000)
> ouch
> => nil
> irb(main):006:0> is_prime?(1000000000)
> [FATAL] failed to allocate memory
> $
>
> p.s.: is_prime? method taken from
> http://www.noulakaz.net/weblog/2007/03/18/a-regular-expression-to-check-for-prime-numbers/
> --
> Posted via http://www.ruby-forum.com/.
>
>


It does not surprise me that  IRB exits ungracefully in that case. BTW
it does not surprise me either that the backtracking regular
expression runs out of memory for such large numbers even if they are
even ;).

Cheers
Robert

-- 
http://ruby-smalltalk.blogspot.com/

---
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