In the meantime a new version of the spec arrived: [https://github.com/nim-lang/Nim/wiki/Destructors,-2nd-edition](https://github.com/nim-lang/Nim/wiki/Destructors,-2nd-edition)
Work on the implementation is on-going, note that `=sink` had to be replaced by the older `=move` idea. But at least we have fewer rewrite rules now.
