>such as when those references could not be shared across threads Shared references can be problematic in a single threaded context too. (You may well be aware

>such as when those references could not be shared across threads Shared references can be problematic in a single threaded context too. (You may well be aware of this, but posting for the benefit of anyone who isn't.) This blog post has a good summary of the problematic cases: https://manishearth.github.io/blog/2015/05/17/the-problem-with-shared-mutability/ https://manishearth.github.io/blog/2015/05/17/the-problem-wi...