Flow type fun

lol_wut_1.js

//@flow
const {curry, get} = require('lodash/fp');

const safePropC = curry((propName, item) => item && item.props && item.props[propName]);
const safeProp = (propName, item) => item && item.props && item.props[propName];


const data = {
	props: {
		name: "james",
		age: 20
	}
}

// these should all pass fine
const age: number = safeProp('age', data)
const age_2: number = safePropC('age', data)
const age_3: number = get('props.age', data)

// The first one should fail and I'd expect flow to be unable 
// to understand the tpye inference when lodash-ing
const x_age: number = safeProp('name', data)
const x_age_2: number = safePropC('name', data)
const x_age_3: number = get('props.name', data)

// when we run flow focus-checklol_wut_1.js
// It throw the correct error (sort of) but detects the error happening
// to a similair module
/*
Error: f.js:18
 18: const age: number = safeProp('age', data)
                         ^^^^^^^^^^^^^^^^^^^^^ string. This type is incompatible with
 18: const age: number = safeProp('age', data)
                ^^^^^^ number

Error: f.js:23
 23: const x_age: number = safeProp('name', data)
                           ^^^^^^^^^^^^^^^^^^^^^^ string. This type is incompatible with
 23: const x_age: number = safeProp('name', data)
                  ^^^^^^ number


Found 2 errors
/*