Property value expected type of string but got null

[larsbs]

• babel-plugin-codegen version: ^3.0.0
• node version: 10.12.0
• npm (or yarn) version: 6.4.1

Relevant code or config

// @codegen

const hello = 'hello';

module.exports = `
  export default {};
`;

I was expecting the simple code above to work but it just gives the error mentioned in the title.

However, if we remove the line const hello = 'hello', everything works as expected and export default {}; it's correctly generated

[larsbs]

Workaround:

Put everything inside a self-executing function:

// @codegen

module.exports = (() => {
  const hello = 'hello';
  return `
    export default {};
  `;
})();

Might be interesting to add this to the readme?

[kentcdodds]

Sure, thanks! Would you like to add that? Though I think it'd be better to figure out why it's not working... 🤔