swift

8626404d - [SE-0470] Treat metatype of archetype/existential type with no protocol requirements as Sendable

[SE-0470] Treat metatype of archetype/existential type with no protocol requirements as Sendable A metatype for an archetype or existential with no (non-marker) protocol requirements cannot, by definition, carry any (isolated) protocol conformances with it, so it's safe to treat such metatypes as Sendable.