Cover bugs in Array assignment
Cover bugs in Array assignment

Closes https://github.com/rakudo/rakudo/issues/1832 R#1832
Rakudo fix: https://github.com/rakudo/rakudo/commit/ac6e26e8fb
            https://github.com/rakudo/rakudo/commit/073a7f50f9
            https://github.com/rakudo/rakudo/commit/54e390f57e

perl6/roast,dogbert17/roast,dogbert17/roast