Wrong number of arguments in a macro crashes the macro processor

[SuperFola]

What happened?

Giving too many (or not enough) arguments to a macro results in a bad_variant access / segmentation fault.

This has been found thanks to https://github.com/AFLplusplus/AFLplusplus

What ArkScript version are you seeing the problem on?

dev

Relevant code & log output

!{defun (name args body)
    (let name (fun args body))}
(defun foo () 0 1)

!{last () (print (@ args -1))}
(last 1 2)

Documentation

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