This hint message needs to be fixed. If blindly using `move(x)` was sound, the compiler could have done it for you too. What the compiler really means is that you have to do an analysis to see whether the copy can be avoided by a program restructuring.
> There is also a blog post by Araq but it may be outdated. Blog posts are always outdated (maybe I should change that?), the official documentation is up to date.
