error: this form of character escape may only be used with characters in the range [\x00-\x7f]
  --> $DIR/ascii-only-character-escape.rs:4:16
   |
LL |     let x = "\x80";
   |                ^^

error: this form of character escape may only be used with characters in the range [\x00-\x7f]
  --> $DIR/ascii-only-character-escape.rs:5:16
   |
LL |     let y = "\xff";
   |                ^^

error: this form of character escape may only be used with characters in the range [\x00-\x7f]
  --> $DIR/ascii-only-character-escape.rs:6:16
   |
LL |     let z = "\xe2";
   |                ^^

error: aborting due to 3 previous errors