Rust errors / Everything else
Rust compiler error · checked with rustc 1.99.0
Rust error E0670: rust 2015 does not permit the use of `async fn`
What it meansRust 2015 does not permit the use of async fn.
E0670Everything else
Activein rustc 1.99.0
8related errors linked below
The compiler team's explanation
Rust 2015 does not permit the use of async fn.
Erroneous code example:
async fn foo() {}Switch to the Rust 2018 edition to use async fn.
From rustc --explain E0670 (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
- E0695unlabeled `break` inside of a labeled block
- E0696`continue` pointing to 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?