[perl #71454] Method 'prime' not found for invocant of class 'Integer'

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# New Ticket Created by  robert strahl 
# Please include the string:  [perl #71454]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=71454 >


use v6;

class Int is also {
  method prime() {

    return True;
  }
}

say "Testing 1..5";
for 1,2,3,4,5 {
  print "$_ is: ";
  if .prime { say "prime" } else { say "NOT prime" }
}
say "";

say "Testing 1..5, again";
for 1..5 {
  print "$_ is: ";
  if .prime { say "prime" } else { say "NOT prime" }
}