error: unicode escape sequences cannot be used as a byte or in a byte string
  --> $DIR/issue-23620-invalid-escapes.rs:14:15
   |
LL |     let _ = b"/u{a66e}";
   |               ^^^^^^^^

error: unicode escape sequences cannot be used as a byte or in a byte string
  --> $DIR/issue-23620-invalid-escapes.rs:17:15
   |
LL |     let _ = b'/u{a66e}';
   |               ^^^^^^^^

error: incorrect unicode escape sequence
  --> $DIR/issue-23620-invalid-escapes.rs:20:15
   |
LL |     let _ = b'/u';
   |               ^^
   |
help: format of unicode escape sequences is `/u{…}`
  --> $DIR/issue-23620-invalid-escapes.rs:20:15
   |
LL |     let _ = b'/u';
   |               ^^

error: unicode escape sequences cannot be used as a byte or in a byte string
  --> $DIR/issue-23620-invalid-escapes.rs:20:15
   |
LL |     let _ = b'/u';
   |               ^^

error: numeric character escape is too short
  --> $DIR/issue-23620-invalid-escapes.rs:24:17
   |
LL |     let _ = b'/x5';
   |                 ^

error: invalid character in numeric character escape: x
  --> $DIR/issue-23620-invalid-escapes.rs:27:17
   |
LL |     let _ = b'/xxy';
   |                 ^

error: invalid character in numeric character escape: y
  --> $DIR/issue-23620-invalid-escapes.rs:27:18
   |
LL |     let _ = b'/xxy';
   |                  ^

error: numeric character escape is too short
  --> $DIR/issue-23620-invalid-escapes.rs:31:16
   |
LL |     let _ = '/x5';
   |                ^

error: invalid character in numeric character escape: x
  --> $DIR/issue-23620-invalid-escapes.rs:34:16
   |
LL |     let _ = '/xxy';
   |                ^

error: invalid character in numeric character escape: y
  --> $DIR/issue-23620-invalid-escapes.rs:34:17
   |
LL |     let _ = '/xxy';
   |                 ^

error: unicode escape sequences cannot be used as a byte or in a byte string
  --> $DIR/issue-23620-invalid-escapes.rs:38:15
   |
LL |     let _ = b"/u{a4a4} /xf /u";
   |               ^^^^^^^^

error: invalid character in numeric character escape:  
  --> $DIR/issue-23620-invalid-escapes.rs:38:27
   |
LL |     let _ = b"/u{a4a4} /xf /u";
   |                           ^

error: incorrect unicode escape sequence
  --> $DIR/issue-23620-invalid-escapes.rs:38:28
   |
LL |     let _ = b"/u{a4a4} /xf /u";
   |                            ^^
   |
help: format of unicode escape sequences is `/u{…}`
  --> $DIR/issue-23620-invalid-escapes.rs:38:28
   |
LL |     let _ = b"/u{a4a4} /xf /u";
   |                            ^^

error: unicode escape sequences cannot be used as a byte or in a byte string
  --> $DIR/issue-23620-invalid-escapes.rs:38:28
   |
LL |     let _ = b"/u{a4a4} /xf /u";
   |                            ^^

error: invalid character in numeric character escape:  
  --> $DIR/issue-23620-invalid-escapes.rs:44:17
   |
LL |     let _ = "/xf /u";
   |                 ^

error: this form of character escape may only be used with characters in the range [/x00-/x7f]
  --> $DIR/issue-23620-invalid-escapes.rs:44:16
   |
LL |     let _ = "/xf /u";
   |                ^^

error: incorrect unicode escape sequence
  --> $DIR/issue-23620-invalid-escapes.rs:44:18
   |
LL |     let _ = "/xf /u";
   |                  ^^
   |
help: format of unicode escape sequences is `/u{…}`
  --> $DIR/issue-23620-invalid-escapes.rs:44:18
   |
LL |     let _ = "/xf /u";
   |                  ^^

error: aborting due to 17 previous errors