error: out of range hex escape
  --> $DIR/ascii-only-character-escape.rs:2:14
   |
LL |     let x = "\x80";
   |              ^^^^ must be a character in the range [\x00-\x7f]

error: out of range hex escape
  --> $DIR/ascii-only-character-escape.rs:3:14
   |
LL |     let y = "\xff";
   |              ^^^^ must be a character in the range [\x00-\x7f]

error: out of range hex escape
  --> $DIR/ascii-only-character-escape.rs:4:14
   |
LL |     let z = "\xe2";
   |              ^^^^ must be a character in the range [\x00-\x7f]

error: aborting due to 3 previous errors