Jordan Rose 2d3872a076 [Serialization] If an override is dynamic, missing the base decl is OK ...

...specifically `@objc dynamic`, that is. This is one case where we
/know/ that the override does not depend on the base in any way---any
attributes have already been propagated down, and there's no vtable
entry. This is especially important for properties, which have no
recovery if their accessors can't be deserialized.

rdar://50827914

2019-06-18 13:46:49 -07:00

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