From: Nobuyoshi Nakada <nobu@...>
Date: 2009-02-05T11:02:17+09:00
Subject: [ruby-core:21848] Re: What does this regexp mean - /\c#{_J}/

Hi,

At Thu, 5 Feb 2009 07:53:55 +0900
Charles Oliver Nutter wrote in [ruby-core:21839]:
>> irb(main):002:0> re = /\c#{_J}/
>>
>> (irb):2: warning: regexp has invalid interval
>>
>> (irb):2: warning: regexp has `}' without escape
>
> No warnings in JRuby but we appear to do the same thing. Parser artifact
> no doubt...I'd call it a bug.

Not a bug.  The regexp is same as /a{_J}/, which lacks numeric range
inside repeatitive modifier.  Oniguruma and JRuby just silently ignore
the invalid regexp portion.

-- 
Nobu Nakada