[perl #127190] Perl 6 has 0 elements ( .hyper.grep )

[Will Coleda via RT]

On Wed Jan 06 06:35:15 2016, alex.jakime...@gmail.com wrote:
> Regular grep:
> 
> <AlexDaniel> m: say ^10 .grep: *.is-prime
> <camelia> rakudo-moar fec061: OUTPUT«(2 3 5 7)␤»
> 
> With hyper:
> 
> <AlexDaniel> m: say ^10 .hyper.grep: *.is-prime
> <camelia> rakudo-moar fec061: OUTPUT«   it has 0 elements.␤()␤»
> 
> With race:
> 
> <AlexDaniel> m: say ^10 .race.grep: *.is-prime
> <camelia> rakudo-moar fec061: OUTPUT«   it has 0 elements.␤()␤»
> 
> 
> More:
> 
> <AlexDaniel> m: my @a = ^1000 .hyper.grep(* > 5); say @a
> <camelia> rakudo-moar fec061: OUTPUT«   it has 0 elements.␤   it has 0
>                     elements.␤   it has 0 elements.␤   it has 0
> elements.␤   it has 0
>                     elements.␤   it has 0 elements.␤   it has 0
> elements.␤   it has 0
>                     elements.␤   it has 0 elements.␤   it has 0
> elements.␤   it has 0
>                     elem…»
> 
> What is this “it has 0 elements.” thing? Why do I see it? Why it returns an
> empty list?

This was added by timo after Christmas; This debug output is the only thing in 
the conditional block it appears in.

$ git show 20c796cd
commit 20c796cd31e5148e2f8fd35aab4c7eca073696ca
Author: Timo Paulssen <timona...@perpetuum-immobile.de>
Date:   Thu Dec 31 03:39:49 2015 +0100

    hyper now cares about sequence numbers of work

    this code wants to get a bit cleaned up. i'm sure
    the control flow could be a bit less convoluted.

-- 
Will "Coke" Coleda