Slava Pestov 72c8e787ad SIL: Don't serialize imported conformances nested in non-public types ...

Apparently you can use a swift_name attribute in Clang to import types
as members of Swift types. If the Swift type is not public, we would
still try to serialize the witness thunks, which tripped SIL verifier
checks since the witnesses themselves were not serialized.

Note that the fix here is to just delete the special case of an
imported conformance; the regular "type is public and protocol is
public" condition suffices here.

Fixes <rdar://problem/48218483>.

2019-02-22 02:35:18 -05:00

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