JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        JsExpressionStatement {
            expression: JsBogusExpression {
                items: [
                    ERROR_TOKEN@0..11 "\\u0061sync" [] [Whitespace(" ")],
                    JsParameters {
                        l_paren_token: L_PAREN@11..12 "(" [] [],
                        items: JsParameterList [],
                        r_paren_token: R_PAREN@12..14 ")" [] [Whitespace(" ")],
                    },
                    FAT_ARROW@14..17 "=>" [] [Whitespace(" ")],
                    JsFunctionBody {
                        l_curly_token: L_CURLY@17..18 "{" [] [],
                        directives: JsDirectiveList [],
                        statements: JsStatementList [],
                        r_curly_token: R_CURLY@18..19 "}" [] [],
                    },
                ],
            },
            semicolon_token: missing (optional),
        },
    ],
    eof_token: EOF@19..20 "" [Newline("\n")] [],
}

0: JS_MODULE@0..20
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..19
    0: JS_EXPRESSION_STATEMENT@0..19
      0: JS_BOGUS_EXPRESSION@0..19
        0: ERROR_TOKEN@0..11 "\\u0061sync" [] [Whitespace(" ")]
        1: JS_PARAMETERS@11..14
          0: L_PAREN@11..12 "(" [] []
          1: JS_PARAMETER_LIST@12..12
          2: R_PAREN@12..14 ")" [] [Whitespace(" ")]
        2: FAT_ARROW@14..17 "=>" [] [Whitespace(" ")]
        3: JS_FUNCTION_BODY@17..19
          0: L_CURLY@17..18 "{" [] []
          1: JS_DIRECTIVE_LIST@18..18
          2: JS_STATEMENT_LIST@18..18
          3: R_CURLY@18..19 "}" [] []
      1: (empty)
  4: EOF@19..20 "" [Newline("\n")] []
--
arrow_escaped_async.js:1:1 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × 'async' keyword cannot contain escape character.
  
  > 1 │ \u0061sync () => {}
      │ ^^^^^^^^^^
    2 │ 
  
--
\u0061sync () => {}