```
myhash = {"some": "thing", "over": "the rainbow", "x": "y"}
some, over = myhash
echo(some) # "thing"
```

@ntwrick I had to revert one of your changes we introduced
when adding error lines etc. When we evaluate null literals
we always return a new object, and this means that when
you compare `null == null` that is `false` as they're 2
different objects. For now I reverted that line you changed
but maybe we could also think of adding a special case to
handle `==` with nulls. Problem is, you'd have to add another
special case for `!=` so I think it's probably easier to just
reuse the same object for nulls...what do you think?