E0771 - Error codes index
Description: Book listing all Rust error codes

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# Error code E0771

#### Note: this error code is no longer emitted by the compiler

A non-`'static` lifetime was used in a const generic. This is currently not allowed.

Erroneous code example:

    #![allow(unused)]
    #![feature(adt_const_params, unsized_const_params)]

    fn main() {
    fn function_with_str<'a, const STRING: &'a str>() {} // error!
    }

To fix this issue, the lifetime in the const generic need to be changed to `'static`:

    #![allow(unused)]
    #![feature(adt_const_params, unsized_const_params)]

    fn main() {
    fn function_with_str<const STRING: &'static str>() {} // ok!
    }

For more information, see GitHub issue #74052.