`.out` is inferring `unknown`

import { ArkErrors, type } from "arktype";

const ToBigInt = type("string").pipe((v) => BigInt(v));

const MyType = type({
  a: ToBigInt,
  b: "number"
});

// type MyType = typeof MyType.out;
// Results in:
// type MyType = Type<{
//   a: unknown;
//   b: number;
// }, {}>


type MyType = Exclude<ReturnType<typeof MyType>, ArkErrors>;
// Is correct:
// type MyType = {
//   a: bigint;
//   b: number;
// }

import { ArkErrors, type } from "arktype";

const ToBigInt = type("string").pipe((v) => BigInt(v));

const MyType = type({
  a: ToBigInt,
  b: "number"
});

// type MyType = typeof MyType.out;
// Results in:
// type MyType = Type<{
//   a: unknown;
//   b: number;
// }, {}>


type MyType = Exclude<ReturnType<typeof MyType>, ArkErrors>;
// Is correct:
// type MyType = {
//   a: bigint;
//   b: number;
// }