The Problem

sub c1(Complex @a) { say @a.WHAT }
sub c2(Complex @a is copy) { say @a.WHAT }

my Complex @a = 1+2i, 2+3i, 4+2i;
c1(@a); # prints (Array[Complex])
c2(@a); # prints (Array)

Expected Behavior

(Array[Complex])
(Array[Complex])

Actual Behavior

(Array[Complex])
(Array)

Steps to Reproduce

See above

Environment

• Operating system:
  Linux
• Compiler version (perl6 -v):
  2018.06