Test opt methods/sinkage of `xx` with simple value
Test opt methods/sinkage of `xx` with simple value

Closes https://github.com/rakudo/rakudo/issues/1708 R#1708
Rakudo fix: https://github.com/rakudo/rakudo/commit/5f256baec2

dogbert17/roast,dogbert17/roast,perl6/roast