Ironruby core - Feb 2008 - Regexp anomalous behavior

Consider following program (test.rb):

puts ''aaabbbaaa''.match(''aaa'').length
puts ''aaabbbaaa''.match(''x'').length

With CRuby, the result or running is:

[08:49:31 ~] ruby test.rb 
1
test.rb:2: undefined method `length'' for nil:NilClass (NoMethodError)

With IronRuby (revision 76):

[08:37:14 ~] rbx test.rb 
3
0

I apologize if this is a well-known issue and already on some to-do list

Robert Brotherus
Software architect
Napa Ltd
Tammasaarenkatu 3, Helsinki FI-00180
P.O.Box 470, Helsinki FI-00181

Tel.          +358 9 22 813 1 
Direct.      +358 9 22 813 611 
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Email: Robert.Brotherus at napa.fi  
www.napa.fi 


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Robert Brotherus:
> Consider following program (test.rb):
>
> puts ''aaabbbaaa''.match(''aaa'').length
> puts ''aaabbbaaa''.match(''x'').length
>
> With CRuby, the result or running is:
>
> [08:49:31 ~] ruby test.rb
> 1
> test.rb:2: undefined method `length'' for nil:NilClass
(NoMethodError)
>
> With IronRuby (revision 76):
>
> [08:37:14 ~] rbx test.rb
> 3
> 0
Sure looks like a bug. I opened a bug for it:
http://rubyforge.org/tracker/index.php?func=detail&aid=18407&group_id=4359&atid=16798

- John