[Issue 19537] Invariants from base classes not called

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19537

--- Comment #5 from RazvanN <razvan.nitu1305 at gmail.com> ---
(In reply to Basile-z from comment #2)
> Reducing further shows that this has never worked correctly actually, see
> https://run.dlang.io/is/D3nV8K.

This case is Issue 7337 which is fixed by [1]. However, [1] does not fix the
originally reported bug.

[1] https://github.com/dlang/dmd/pull/14414

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