This worked fine on an older version of trunk that I had installed, but with the current trunk I can confirm the same problem. Can you please file a ticket? On Thu, Mar 10, 2011 at 9:01 PM, Mark Rada <mrada@marketcircle.com> wrote:

Hey all,

I am getting an error when I add a #to_s method to NSURL:

        ± irb        irb(main):001:0> class NSURL        irb(main):002:1>   alias_method :to_s, :absoluteString        irb(main):003:0> end        => NSURL        irb(main):004:0> NSURL.URLWithString( 'macruby.org' )        RuntimeError: can't modify frozen/immutable string

       irb(main):005:0> test = NSURL.URLWithString( 'macruby.org' )        RuntimeError: can't modify frozen/immutable string

       irb(main):006:0> test.to_s        => "macruby.org"        irb(main):007:0>

So the error seems to be macirb trying to do something to the string that is returned from #to_s.

I'm not sure if this is unique to MacRuby, as the CRuby documentation for Object#to_s doesn't say whether the returned object should be frozen, but should I be making #to_s return a mutable/unfrozen string?

Mark Rada mrada@marketcircle.com

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