[perl #126558] [BUG] Grammar parse failure should probably return Nil not Any

[Aleks-Daniel Jakimenko-Aleksejev via RT]

Is this ticket relevant today?

Note that we also have this: https://rt.perl.org/Ticket/Display.html?id=131919
On 2016-12-19 08:41:33, ronaldxs wrote:
> On Tue, 03 Nov 2015 14:26:06 -0800, ronaldxs wrote:
> > 18:07 mr_ron m: grammar G { token TOP { a+ } }; my Nil $x =
> > G.parse("zz")
> > 18:07 camelia rakudo-moar 273e89: OUTPUT«Type check failed in
> > assignment to $x; expected Nil but got Any␤ in block <unit> at
> > /tmp/HMNfyPJjvI:1␤␤»
> >
> > 17:56 mr_ron m: grammar G { token TOP { a+ | <bs> }; token bs { b+ }
> > }; say G.parse("zz").WHAT; say G.parse("aa")<bs>.WHAT
> > 17:56 camelia rakudo-moar 273e89: OUTPUT«(Any)␤Nil␤»
>
> Reran test cases and they now run as expected. Might be of interest
> to add test case(s?) to roast/S05-match/non-capturing.t?