Confirmed bug still appears in Rakudo 2017.04 Mac OS X .dmg install. None of the examples given in the p6doc command help actually work.
Given that a dmg install is the first thing a newbie would try, this is important to growing the Perl 6 community. Based on a clean install on a new 2016 MacBook Pro. This is Rakudo version 2017.04.3 built on MoarVM version 2017.04-53-g66c6dda implementing Perl 6.c.