is it normal to be kicked out of irb?

[Emmanuel Oga]

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/

 

[Robert Dober]

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/

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