Close($file) required in Perl 6, unlike Perl 5

The following program: my $skeleton = bones\n; my $new_file = grave; my $handle = open($new_file, :w); $handle.print($skeleton); opens the grave file, but leaves it empty. A last line: close($handle);# close() generates an error message. is required to get any contents in the file,

Bug?

When a subroutine is invoked with an empty parameter list, as follows: run_stuff(); sub run_stuff { my ($parm) = @_; say Parameter is $parm; } @_[0] contains Any(). Should it?