Fixed with 1d12563b6c2cb39 , tests needed
> On 24 Mar 2016, at 21:40, Alex Jakimenko (via RT)
> <perl6-bugs-follo...@perl.org> wrote:
>
> # New Ticket Created by Alex Jakimenko
> # Please include the string: [perl #127777]
> # in the subject line of all future correspondence about this issue.
> # <URL: https://rt.perl.org/Ticket/Display.html?id=127777 >
>
>
> Code:
> permutations -1
>
> Result:
> Constraint type check failed for parameter '$n'
> in block <unit> at -e line 1
>
>
>
> There's no “$n” in my code, so it should not mention it.
