error: Expected ';', '}' or <eof>
 --> $DIR/tests/test262-parser/fail/4ff4b78ff3e2de6e.js:1:10
  |
1 | (a) => {}()
  |          ^
  |
note: This is the expression part of an expression statement
 --> $DIR/tests/test262-parser/fail/4ff4b78ff3e2de6e.js:1:1
  |
1 | (a) => {}()
  | ^^^^^^^^^