Rust errors / Everything else
Rust compiler error · checked with rustc 1.99.0
Rust error E0667: #### Note: this error code is no longer emitted by the compiler
What it means#### Note: this error code is no longer emitted by the compiler.
Retired: rustc no longer emits this error code. You may still see it in old answers, books and CI logs from older toolchains; the explanation below is kept for reference.
E0667Everything else
Retiredin rustc 1.99.0
8related errors linked below
The compiler team's explanation
Note: this error code is no longer emitted by the compiler.
impl Trait is not allowed in path parameters.
Erroneous code example:
fn some_fn(mut x: impl Iterator) -> <impl Iterator>::Item { // error!
x.next().unwrap()
}You cannot use impl Trait in path parameters. If you want something equivalent, you can do this instead:
fn some_fn<T: Iterator>(mut x: T) -> T::Item { // ok!
x.next().unwrap()
}From rustc --explain E0667 (1.99.0), part of the Rust project, MIT or Apache-2.0. Official page.
Related errors
- E0061this function takes N arguments but M were supplied
- E0412cannot find type in this scope
- E0515cannot return reference to local variable
- E0728await is only allowed inside async functions and blocks
- E0646`main` function is not allowed to have a `where` clause
- E0659`foo` is ambiguous
- E0670Rust 2015 does not permit the use of `async fn`
- E0695unlabeled `break` inside of a labeled block
Up next
Often hit nextE0061: this function takes N arguments but M were suppliedA related error from the same family.Read it next →Did this answer your question?