[perl #75644] [BUG] Error when reporting an error during parsing caused by doing a role with Lions containing each other in Rakudo

[Carl Mäsak via RT]

masak (>>), coke (>):
> > <masak> rakudo: role Lion[::T] {}; class LionMadeOfLions does
> Lion[Lion] {}
> > <p6eval> rakudo a54677: OUTPUT«===SORRY!===␤Could not find sub
> &chars␤»
> > <masak> whoa! :)
> > * masak submits rakudobug
> 
> Behavior has changed:
> 
> <[Coke]> rakudo: role Lion[::T] {}; class LionMadeOfLions does
> Lion[Lion] {}
> <p6eval> rakudo a47c45: OUTPUT«===SORRY!===␤No applicable candidates
>                found to dispatch to for '_block117'. Available
> candidates
>                are:␤:(Mu ::T )␤␤»

That looks right to me. The inner Lion expects a parameter, and doesn't get 
one. Hence the 
above error.

Sending ticket to tests, in case tests are needed for this.