error: non-ASCII character in byte string literal --> $DIR/key-value-non-ascii.rs:3:19 | LL | #[rustc_dummy = b"ffi.rs"] | ^ must be ASCII | help: if you meant to use the UTF-8 encoding of 'ffi', use \xHH escapes | LL | #[rustc_dummy = b"/xEF/xAC/x83.rs"] | ~~~~~~~~~~~~ error: aborting due to 1 previous error