From: Daniel DeLorme <dan-ml@...42.com>
Date: 2007-08-31T08:10:38+09:00
Subject: Re: Why stack overflow with such a small stack?

Kenneth McDonald wrote:
> I'm getting the following error:
> 
> sheet.rb:35:in `values': stack level too deep (SystemStackError)
>        from sheet.rb:35:in `values'
>        from sheet.rb:53:in `to_s'
>        from sheet.rb:52:in `to_s'
>        from sheet.rb:52:in `map'
>        from sheet.rb:52:in `to_s'
>        from sheet.rb:52:in `to_s'
>        from sheet.rb:52:in `map'
>        from sheet.rb:52:in `to_s'
>        from sheet.rb:52:in `to_s'
>        from sheet.rb:52:in `map'
>        from sheet.rb:52:in `to_s'
>        from sheet.rb:92
> 
> The output above is given _in full_. Is Ruby truncating the call stack 
> in this output? If  so, how I can I see a larger snapshot of the stack, 
> so I can trace down where the infinite recursion is really happening? If 
> not, why am I getting this error?

Here's one even shorter:
 >> def x; x; end; x
SystemStackError: stack level too deep
         from (irb):2:in `x'
         from (irb):2:in `x'
         from (irb):4

Pretty smart of ruby to avoid a gazillion lines of identical output IMHO

Daniel