error: identifiers cannot contain emoji: `🐛`
  --> $DIR/emoji-literal-prefix.rs:3:8
   |
LL | lexes!(🐛#);
   |        ^^
LL | lexes!(🐛"foo");
   |        ^^
LL | lexes!(🐛'q');
   |        ^^
LL | lexes!(🐛'q);
   |        ^^

error: aborting due to 1 previous error