Started \undici\test\wpt\tests\fetch\api\idlharness.any.js
{
  status: 1,
  name: 'Response interface: operation json(any, optional ResponseInit)',
  message: 'assert_equals: property has wrong .length expected 0 but got 1',
  stack: 'Error\n' +
    '    at get_stack (evalmachine.<anonymous>:4534:21)\n' +
    '    at new AssertionError (evalmachine.<anonymous>:4527:22)\n' +
    '    at assert (evalmachine.<anonymous>:4511:19)\n' +
    '    at assert_equals (evalmachine.<anonymous>:1516:9)\n' +
    '    at assert_wrapper (evalmachine.<anonymous>:1436:30)\n' +
    '    at IdlInterface.do_member_operation_asserts (evalmachine.<anonymous>:2363:5)\n' +
    '    at IdlInterface.<anonymous> (evalmachine.<anonymous>:2309:14)\n' +
    '    at Test.step (evalmachine.<anonymous>:2595:25)\n' +
    '    at IdlInterface.test_member_operation (evalmachine.<anonymous>:2257:12)\n' +
    '    at IdlInterface.test_members (evalmachine.<anonymous>:2720:26)'
}