Hi,

At Wed, 14 Nov 2007 05:56:12 +0900,
Jeremy Stephens wrote in [ruby-talk:278872]:
> I was just curious as to why this is illegal.
> 
> Example:
> $ irb
> >> /blah/.clone
> SecurityError: can't modify literal regexp
>         from (irb):1:in `initialize_copy'
>         from (irb):1:in `clone'
>         from (irb):1
> >>
> 
> Regexp.new(/blah/).clone is perfectly OK.  What's insecure about cloning
> a literal regex?

It is to prohibit /blah/.initialize_copy(/foobar/).  You may
know, /blah/.dup works.

-- 
Nobu Nakada