'foo' is missing in props validation (react/prop-types)

I was having trouble with this (‘post’ is missing in props validation (react/prop-types)):

export default Post = ({ post }) => (
  <div>{post.title}</div>
);

Post.propTypes = {
  post: PropTypes.arrayOf(PropTypes.object).isRequired,
};

but this did not have anymore issues:

const Post = ({ post }) => (
  <div>{post.title}</div>
);

Post.propTypes = {
  post: PropTypes.arrayOf(PropTypes.object).isRequired,
};

export default Post;

And I believe this information could be useful:

armenzg@armenzg-mbp readable-app$ node --version
v8.5.0
armenzg@armenzg-mbp readable-app$ ./node_modules/.bin/eslint --version
v4.7.2
armenzg@armenzg-mbp readable-app$ cat package.json | grep eslint
    "lint": "./node_modules/.bin/eslint src/",
    "eslint": "^4.7.2",
    "eslint-config-airbnb": "^15.1.0",
    "eslint-plugin-import": "^2.7.0",
    "eslint-plugin-jsx-a11y": "^5.1.1",
    "eslint-plugin-react": "^7.3.0"
armenzg@armenzg-mbp readable-app$ cat .eslintrc.js
module.exports = {
    "extends": "airbnb",
    "rules": {
      "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
      "no-undef": "off",
      "no-console": "off"
    }
};

[alexzherdev]

FWIW (not sure if this is a good indicator of the real situation in this case) Babel transpiles this to

exports.default = Post = function Post() {};

and then

Post = function Post() {};

is a runtime ReferenceError in strict mode.

[haikyuu]

@ljharb done in #1583