From: Zsban Ambrus <ambrus@...>
Date: 2004-04-28T02:34:18+09:00
Subject: Re: Array#hash bug?

You might count this as a bug, but it is documented.

In ToDo of ruby-1.8.1, there is this line:

- hash etc. should handle self referenceing array/hash

On Wed, Apr 28, 2004 at 02:14:31AM +0900, Mark Hubbart wrote:
> Hi,
> I was messing around with recursive arrays and I came across this:
> 
> mark@imac% cat hash.rb
> a = []
> a[0] = a
> puts a.hash
> mark@imac% ruby -v hash.rb
> ruby 1.9.0 (2004-04-11) [powerpc-darwin]
> hash.rb:3:in `hash': stack level too deep (SystemStackError)
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>          ... 44888 levels...
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3:in `hash'
>         from hash.rb:3
> 
> ... looks like a bug?
> 
> cheers,
> --Mark
> 

ambrus