alt Hacker NewsHow do you expect a compiler to be able to mix and match changes across editions between crates, if those happen to be changes in semantic behaviour?
How do you expect a compiler to be able to mix and match changes across editions between crates, if those happen to be changes in semantic behaviour?
Depends on the change. Obviously the compiler doesn't need to care about cross-edition compatibility between crates if the changes in question don't impact the public API. Otherwise, I'd expect the compiler to canonicalize the changes, and from what I understand that is precisely how edition changes are chosen/designed/implemented.