typeof function guard doesn't work after update

[orlov-vo]

TypeScript Version: 3.1.6 (previous: 3.0.1)

Code

const data = typeof fetcherParams === 'function'
  ? fetcherParams()
  : fetcherParams

It doesn't work for me. Also, I tried to use instanceof and it works:

const data = fetcherParams instanceof Function
  ? fetcherParams()
  : fetcherParams

Expected behavior: no error with typeof statement

Actual behavior:

TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'Function | (() => object)' has no compatible call signatures.

[jack-williams]

I think this is working as intended after a (breaking) change in 3.1.

Read here.

[weswigham]

Working as intended, technically, but the union of an untyped call and a typed call should still be callable. (Likely as the typed call but with an untyped return)