error: `Arguments::<'a>::new_const` is not yet stable as a const fn --> $DIR/issue-64453.rs:4:31 | LL | static settings_dir: String = format!(""); | ^^^^^^^^^^^ | = help: add `#![feature(const_fmt_arguments_new)]` to the crate attributes to enable = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0015]: cannot call non-const fn `format` in statics --> $DIR/issue-64453.rs:4:31 | LL | static settings_dir: String = format!(""); | ^^^^^^^^^^^ | = note: calls in statics are limited to constant functions, tuple structs and tuple variants = note: consider wrapping this expression in `Lazy::new(|| ...)` from the `once_cell` crate: https://crates.io/crates/once_cell = note: this error originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0507]: cannot move out of static item `settings_dir` --> $DIR/issue-64453.rs:14:37 | LL | let settings_data = from_string(settings_dir); | ^^^^^^^^^^^^ move occurs because `settings_dir` has type `String`, which does not implement the `Copy` trait error: aborting due to 3 previous errors Some errors have detailed explanations: E0015, E0507. For more information about an error, try `rustc --explain E0015`.