Incomplete types are generally stored in some wrapper type. We cannot
just assign to the accumulator. Also, we already know whether we have an
ID lookup there. No need to determine it again.
Pick-to: 6.2 6.3
Change-Id: I1f9fd9f147c44975df33fe862523987d8e711905
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Ulf Hermann