Sandbox: https://codesandbox.io/s/cranky-kapitsa-op3jh

Repro: type "a" and then after a second "b"

Expected: Eventually you'll see "ab" in all fields. Pending "..." indicator goes away.

Actual: You'll keep seeing "a" in low pri field. Pending "..." indicator is stuck.
'layout foo destroy',
            'layout foo create',
            'Sync effect',
          ]);
          
          expect(Scheduler).toFlushAndYield([
            'passive foo destroy',
            'passive foo create',
          ]);
        });
        
        act(() => {
          ReactNoop.render(null, () =>
            Scheduler.unstable_yieldValue('Sync effect'),
          );
          expect(Scheduler).toFlushAndYieldThrough([
            'layout bar destroy',
            'layout foo destroy',
            'Sync effect',
          ]);
          
          expect(Scheduler).toFlushAndYield([
            'passive bar destroy',
            'passive foo destroy',
          ]);
        });
      });
      it('does not warn about state updates for unmounted components with pending passive unmounts', () => {
        let completePendingRequest = null;
        function Component() {