Flow: `Object.assign`'s type definition seems to be broken.

[despairblue]

/* @flow */
'use strict'

// property `bar` of object literal. Property not found in object literal
module.exports = exports = Object.assign({foo: true}, {bar: false})

// OR

// property `foo` of object literal. Property not found in object literal
module.exports = exports = Object.assign({}, {foo: true}, {bar: false})

[vkurchatkin]

+1, flow gives a hard time with Object.assign

[glortho]

Your first error is predicted by object sealing @despairblue -- see https://also.github.io/notes/2016/03/13/flow-object-assign.html, but I might expect the second one to work since the target is unsealed.

[jokeyrhyme]

The second example appears to work without any warnings / errors in FlowType 0.36.

[calebmer]

This should work in the latest version of Flow. If you are still having issues let us know 👍