evalable6

query

my @a = 'a'..'g'; @a = @a Z Pair.new(whee, True) xx @a.elems; sub sayLetter ($a, :$whee) { say "$a,$b" }; @a.race.map({ sayLetter(|$_) })

result

(exit code 1) 
===SORRY!=== Error while compiling /tmp/Tut0qnlMja
Variable '$b' is not declared
at /tmp/Tut0qnlMja:1
------> s; sub sayLetter ($a, :$whee) { say "$a,⏏$b" }; @a.race.map({ sayLetter(|$_) })