+watch { cast %h, $wiz } { }, 'cast hash';
+
+watch { %h = () } { clear => 1 }, 'clear hash';
+is_deeply \%h, { }, 'clear: clear hash correctly';
+
+{
+ my @val = (4 .. 6);
+
+ my $wv = init_value @val, 'clear', 'clear';
+
+ value { @val = () } [ 4 .. 6 ];