Hi Julien,

yeah, looks much safer this way IMO.

> So I tried to use that, and here is an updated patch. I had troubles
> using match (it tried to evaluate the content of the list I wanted to
> match with, although that doesn't happen at the REPL), so I used a
> sequence of cdr/car instead. Thanks for the hint :)

Hmm, could you post what you tried?