As always, please [comment](https://internals.rust-lang.org/t/https-www-ralfj-de-blog-2017-08-11-types-as-contracts-evaluation-html/5753) with your thoughts on the topic.
I am particularly curious about what kind of test cases you are throwing at miri, and how it is doing!
-**Update**: I added a proposal for how to fix the `Arc` problem.
+**Update:** I added a proposal for how to fix the `Arc` problem. **/Update**