Throwing a runtime bug with useQuery and Fast Refresh (new React hot reloader)

[jfrolich]

Intended outcome:
Refresh of component. Hook state should be preserved.

Actual outcome:
On a fast refresh useQuery runs into a runtime error. See details in the image below. It seems that a value is undefined that is assumed to be defined. I think it is failing at this line:

react-apollo/packages/hooks/src/data/QueryData.ts

Line 346 in 65b3a88

const currentResult = this.currentObservable.query!.getCurrentResult();

Interestingly there is a typescript nullability override, so maybe that is an assumption that we cannot make in the world of fast refresh?

How to reproduce the issue:

Run any useQuery in React-Native 0.61 RC2.

Version
@apollo/hooks 3.10
React-Native 0.61 RC2