Hacker News Reader

> A good example of a cryptic rust error is the `expected type Foo, but found type Foo` error message which is very inscrutable, especially to a new users.

Does Rust actually give an error like `expected type Foo, but found type Foo`, as in both types are the same in the error? I don't think I've seen that before, but I don't write much Rust.

If both types are the same, what does the error mean?

View on HN

I've seen this error a lot when working with two different versions of the same library. Specifically, you can directly include version A, but a different library depends on a version B, with some of that exposed in the public API.

I think the compiler will now give you a hint that they may be from different versions. If not, next time you see it you should open up a bug in rustc.

To anyone who gets a cryptic error message - that's a bug, report it.

Yup, newer compilers will give you an explicit hint about thee types from being different versions of different crates, but older compilers did not.

Reply on news.ycombinator.com