Flow Bug: facebook/flow#8069
-
Run
yarn install
to set up dependencies. -
Run
yarn flow
and see the following error:Error ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ index.js:32:6 All branches are incompatible: • Either a call signature declaring the expected parameter / return type is missing in DispatchProps [1] but exists in function type [2]. • Or a call signature declaring the expected parameter / return type is missing in DispatchProps [1] but exists in function type [3]. index.js [1] 22│ type DispatchProps = {| 23│ doAction: () => void, 24│ |}; : 29│ }, 30│ ({ 31│ doAction: () => {}, 32│ }: DispatchProps) 33│ ); 34│ simple-react-redux.js [2] 6│ | ((dispatch: D, ownProps: OP) => DP) [3] 7│ | ((dispatch: D, ownProps: OP) => (dispatch: D, ownProps: OP) => DP); Found 1 error
This error is very unexpected, especially since it works if you make a change to the code in a way that should be identical.
In index.js
, if you comment out import { SomeClass } from "./some-import";
and paste the content of some-import.js
directly into the index, yarn flow
will pass without any errors.