JSX union signatures broken in nightly

TypeScript Version: 3.2.0-dev.20181019

Code

declare const MyComponent: (new (props: any) => any) | ((props: any) => any);
<MyComponent />

Expected behavior:

No error.

Actual behavior:

src/a.tsx:2:2 - error TS2604: JSX element type 'MyComponent' does not have any construct or call signatures.

This is breaking tests for react on DefinitelyTyped, so it would be nice to get the fix in soon even if it means reintroducing a kludge.

[weswigham]

Duplicates #27948

[DanielRosenwasser]

Duplicate of #27948