From: ts <decoux@...>
Date: 2001-02-23T00:10:18+09:00
Subject: [ruby-talk:11320] Re: Array bugs?

>>>>> "C" == Christoph Rippel <crippel@primenet.com> writes:

C> I think the problem is with the hashing algorithm. All array 

 rb_ary_hash() I think

C> methods which might invoke array hashing (basically &,|,uniq, 
C> and hashing it self) hang (on my maschine) on self-referential
C> (recursive) arrays.

 Same problem with Array#eql?, Array#<=>

pigeon%  ruby -e 'a = []; a << a; a.eql? a'
-e:1:in `eql?': stack level too deep (SystemStackError)
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1:in `eql?'
         ... 11837 levels...
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1:in `eql?'
        from -e:1
pigeon% 

pigeon%  ruby -e 'a = []; a << a; a <=> a'
-e:1:in `<=>': stack level too deep (SystemStackError)
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1:in `<=>'
         ... 12605 levels...
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1:in `<=>'
        from -e:1
pigeon% 


Guy Decoux