Rust does permit multiple incompatible versions of the same library in the same environment. The types/objects from one version are distinct from the types/obje

Rust does permit multiple incompatible versions of the same library in the same environment. The types/objects from one version are distinct from the types/objects of the other, it's a type error to try mix them. But you can use two versions of the same library in your project; I've done it by giving one of them a different name.