error: Expected LBrace, got None --> $DIR/tests/test262-parser/fail/2d1410e37ecc3647.js:1:23 | 1 | function f(a, ...b = 0) | ^ error: TS1048 --> $DIR/tests/test262-parser/fail/2d1410e37ecc3647.js:1:18 | 1 | function f(a, ...b = 0) | ^