A non-`'static` lifetime was used in a const generic. This is currently not allowed. Erroneous code example: ```compile_fail,E0771 #![feature(adt_const_params)] 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`: ``` #![feature(adt_const_params)] fn function_with_str() {} // ok! ``` For more information, see [GitHub issue #74052]. [GitHub issue #74052]: https://github.com/rust-lang/rust/issues/74052