Slava Pestov 06de5d70c1 Sema: Use dynamic dispatch for inout access of properties in classes ...

The problem is that the derived property's materializeForSet was
being synthesized after recordOverride() was called, so the new
accessor never got setOverridenDecl() called on it.

As a result, SIL didn't know that the derived materializeForSet
should replace the vtable entry for the base class materializeForSet.

The more fundamental problem here is that even after some recent
cleanups, accessors are still sometimes type checked before
the AbstractStorageDecla and sometimes after. So things like
inferring final, dynamic and overrides have to be duplicated in
multiple places.

Fixes <https://bugs.swift.org/browse/SR-3840> and
<rdar://problem/30336146>.

2017-02-06 19:34:30 -07:00

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