@swift-main @swift-6.0.3 -swift-version 6 -strict-concurrency=complete

func f0(_ x: () async -> Void) { f1(x) f2(x) f3(x) } func f1(_ x: @Sendable () async -> Void) { f0(x) f2(x) f3(x) } func f2(_ x: @MainActor () async -> Void) { f0(x) f1(x) f3(x) } func f3(_ x: @MainActor @Sendable () async -> Void) { f0(x) f1(x) f2(x) }

(edited)