[perl #131623] [BUG] Range + detached method + map with &sub = "Cannot find method 'count' on object of type NQPMu"

[Jan-Olof Hendig via RT]

On Thu, 22 Jun 2017 05:25:08 -0700, c...@zoffix.com wrote:
> A WhateverCode detached map or a &sub undetached map works fine:
>     m: ^2 .map: *.say
>     rakudo-moar 86e7b2: OUTPUT: «0␤1␤»
>     m: (^2).map: &say
>     rakudo-moar 86e7b2: OUTPUT: «0␤1␤»
> 
> But explodes if you try to both detache and use the &sub map:
>     m: ^2 .map: &say
>     rakudo-moar 86e7b2: OUTPUT: «===SORRY!===␤Cannot find method
> 'count' on object of type NQPMu␤»

Fixed with commit 
https://github.com/rakudo/rakudo/commit/f3efe5e6b4a9ee59f71ca11cb90ef78539be45e3