formik: [v2] initialValues broken in 2.0.1-alpha.51 & 2.0.1-rc.0 with CRA

🐛 Bug report

Current Behavior

• initialValues are not set in the versions mentioned in dev CRA environment
• Ok in 2.0.1-alpha.5.
• Can’t reproduce in codeSandbox
• Works once build

So it’s probably a broken compatibility between the development version output of @palmerhq/tsdx and CRA. I can move the issue to tsdx if you want.

Reproducible example

• yarn create react-app formik-test --typescript
• yarn add formik@next
• Change App.tsx to:

import React from "react";
import { Formik } from "formik";

const App: React.FC = () => {
  return (
    <Formik
      initialValues={{ email: "Will crash", password: "" }}
      onSubmit={console.log}
      render={props => (
        <>
          <input value={props.values.email} name="email" type="email" />
          <input
            value={props.values.password}
            name="password"
            type="password"
          />
          <button>Log In</button>
        </>
      )}
    />
  );
};

export default App;

Your environment

Software	Version(s)
Formik	2.0.1-rc.0
React	16.8.6
CRA	3.0.1
TypeScript	3.4.5
Browser	Chrome
npm/Yarn	yarn 1.16
Operating System	macOS