[Issue 16339] insertInPlace should be tested for unions and classes

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=16339

--- Comment #2 from Илья Ярошенко <ilyayaroshenko at gmail.com> ---
*** Issue 16314 has been marked as a duplicate of this issue. ***

--