error[E0133]: call to unsafe function `require_unsafe` is unsafe and requires unsafe function or block --> $DIR/expr-unsafe-err.rs:8:9 | LL | require_unsafe(); | ^^^^^^^^^^^^^^^^ call to unsafe function | = note: consult the function's documentation for information on how to avoid undefined behavior error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0133`.