A typed exception X::Syntax::NonAssociative is now thrown.
$ perl6-m -e 'say [+] "08:12:23".split(":") Z* 60 X** reverse ^3'
===SORRY!=== Error while compiling -e
Operators 'Z*' and 'X**' are non-associative and require parentheses
at -e:1
--> say [+] "08:12:23".split(":") Z* 60 X⏏** reverse ^
# New Ticket Created by "Carl Mäsak"
# Please include the string: [perl #77848]
# in the subject line of all future correspondence about this issue.
# http://rt.perl.org/rt3/Ticket/Display.html?id=77848 >
rakudo: say [+] '08:12:23'.split(':') Z* (60 X** reverse ^3)
rakudo c71489: OUTPUT«295