[SE-0470] Prohibit inference of isolated conformances with nonisolated witnesses #81296
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…d witnesses If all of the witnesses to a conformance are nonisolated, then infer that conformance as nonisolated rather than global-actor-isolated. This is only relevant when InferIsolatedConformances is enabled, and prevents that inference to help maintain source compatibility.
This request was looking through to the root conformance, which could mess with the caching bits. Sink the "is nonisolated conformance" bit down into ProtocolConformance, and have the request for a non-root conformance be defined in terms of the request for the root conformance.
This assertion will trigger whenever there is a cycle with a split-cached request. Remove the assertion.
DougGregor
requested review from
ktoso,
hborla,
slavapestov,
xedin and
CodaFi
as code owners
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@swift-ci please smoke test |
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@swift-ci please smoke test macOS |
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@swift-ci please smoke test |
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If all of the witnesses to a conformance are nonisolated, then infer that conformance as nonisolated rather than global-actor-isolated. This is only relevant when InferIsolatedConformances is enabled, and prevents that inference to help maintain source compatibility.