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omochimetaru
@swift-main final class C: Sendable { @MainActor var a: [Int] = [] @MainActor func b() {} func foo() async { await MainActor.run { self.a = [1] self.b() } } } @MainActor func main() async { let c = C() c.a = [1] c.b() }
swiftNightly BOT 11/21/2023 12:11 PM
<stdin>:2:20: warning: stored property 'a' of 'Sendable'-conforming class 'C' is mutable @MainActor var a: [Int] = [] ^