error: Uncaught (in worker "") Error: foo
  throw new Error("foo");
        ^
    at foo ([WILDCARD]/error.ts:2:9)
    at [WILDCARD]/error.ts:5:1
{
  message: "Uncaught Error: foo",
  filename: "[WILDCARD]/error.ts",
  lineno: 2,
  colno: 9
}
error: Uncaught (in promise) Error: Unhandled error in child worker.
    at [WILDCARD]