error[E0133]: call to unsafe function is unsafe and requires unsafe function or block --> $DIR/unsafe-const-fn.rs:10:18 | LL | const VAL: u32 = dummy(0xFFFF); | ^^^^^^^^^^^^^ call to unsafe function | = note: consult the function's documentation for information on how to avoid undefined behavior error: aborting due to previous error For more information about this error, try `rustc --explain E0133`.