From @timo

The first three of these ought to output a bit more, IMO, just like the
last one does.

  > perl6 -e 'my $r = regex { foo }; say $r.perl'
  { foo }
  > perl6 -e 'my $r = token { foo }; say $r.perl'
  { foo }
  > perl6 -e 'my $r = rule { foo }; say $r.perl'
  { foo }
  > perl6 -e 'my $r = rx{ foo }; say $r.perl'
  rx{ foo }

From @hoelzro

Fixed in bd0401b.

@hoelzro - Status changed from 'new' to 'resolved'