error[E0133]: use of extern static is unsafe and requires unsafe function or block --> $DIR/issue-28575.rs:8:5 | LL | FOO() | ^^^ use of extern static | = note: extern statics are not controlled by the Rust type system: invalid data, aliasing violations or data races will cause undefined behavior error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0133`.