[Conformance lookup table] Prefer synthesized conformances to deserialized ones. #12471
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…lized ones. When a conformance can either be synthesized or implied, we tend to prefer implied. However, if the implied conformance comes from a deserialized conformance, it will lead to an incomplete conformance and cause a crash. This is a narrow fix for SR-6105 / rdar://problem/34911378.
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@swift-ci please smoke test and merge |
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When a conformance can either be synthesized or implied, we tend to prefer
implied. However, if the implied conformance comes from a deserialized
conformance, it will lead to an incomplete conformance and cause a crash.
This is a narrow fix for SR-6105 / rdar://problem/34911378.