[perl #72790] [BUG] Rakudo should return Nil, not Failure, when an optionally called method wasn't called because it didn't exist in Rakudo

[jn...@jnthn.net via RT]

> <TimToady> another case where rakudo returns a Failure that should
> probably just return Nil
> <jnthn> TimToady: Really?
> <TimToady> I told it the call was optional
> <jnthn> Hmm...true.
> <masak> rakudo: my $a; say ($a.?foo).WHAT
> <p6eval> rakudo 1d4928: OUTPUT«Failure()␤»

It now returns Nil. Tests needed.

Thanks,

Jonathan