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// RUN: %target-swift-frontend -emit-sil -swift-version 6 -disable-availability-checking -enable-experimental-feature TransferringArgsAndResults -verify %s -o /dev/null -parse-as-library
// REQUIRES: asserts
// REQUIRES: concurrency
////////////////////////
// MARK: Declarations //
////////////////////////
class NonSendableKlass {}
func useValue<T>(_ t: T) {}
func useValueAsync<T>(_ t: T) async {}
/////////////////
// MARK: Tests //
/////////////////
@MainActor
func withCheckedContinuation_1() async -> NonSendableKlass {
await withCheckedContinuation { continuation in
continuation.resume(returning: NonSendableKlass())
}
}
func withCheckedContinuation_1a() async -> NonSendableKlass {
await withCheckedContinuation { continuation in
continuation.resume(returning: NonSendableKlass())
}
}
@MainActor
func withCheckedContinuation_2() async -> NonSendableKlass {
await withCheckedContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
}
func withCheckedContinuation_2a() async -> NonSendableKlass {
await withCheckedContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
}
@MainActor
func withCheckedContinuation_3() async {
// x is main actor isolated since withCheckedContinuation is #isolated.
let x = await withCheckedContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
await useValueAsync(x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{sending main actor-isolated 'x' to nonisolated global function 'useValueAsync' risks causing data races between nonisolated and main actor-isolated uses}}
}
func withCheckedContinuation_3a() async {
let x = await withCheckedContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
// This is ok since x is disconnected.
await useValueAsync(x)
}
@MainActor
func withCheckedContinuation_4() async {
// x is main actor isolated since withCheckedContinuation is #isolated.
let y = NonSendableKlass()
let x = await withCheckedContinuation { continuation in
continuation.resume(returning: y)
// expected-error @-1 {{sending 'y' risks causing data races}}
// expected-note @-2 {{main actor-isolated 'y' is passed as a 'sending' parameter}}
useValue(y)
}
await useValueAsync(x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{sending main actor-isolated 'x' to nonisolated global function 'useValueAsync' risks causing data races between nonisolated and main actor-isolated uses}}
}
func withCheckedContinuation_4a() async {
// x is main actor isolated since withCheckedContinuation is #isolated.
let y = NonSendableKlass()
let x = await withCheckedContinuation { continuation in
continuation.resume(returning: y)
// expected-error @-1 {{sending 'y' risks causing data races}}
// expected-note @-2 {{task-isolated 'y' is passed as a 'sending' parameter}}
useValue(y)
}
await useValueAsync(x)
}
@MainActor func testAsyncStream() {
let (_, continuation) = AsyncStream.makeStream(of: NonSendableKlass.self)
continuation.yield(NonSendableKlass())
let x = NonSendableKlass()
continuation.yield(x) // expected-error {{sending 'x' risks causing data races}}
// expected-note @-1 {{'x' used after being passed as a 'sending' parameter; Later uses could race}}
useValue(x) // expected-note {{access can happen concurrently}}
}
@MainActor func testAsyncStreamContinuation() {
let _ = AsyncStream(NonSendableKlass.self) { continuation in
continuation.yield(NonSendableKlass())
let x = NonSendableKlass()
continuation.yield(x) // expected-error {{sending 'x' risks causing data races}}
// expected-note @-1 {{'x' used after being passed as a 'sending' parameter; Later uses could race}}
useValue(x) // expected-note {{access can happen concurrently}}
}
}
@MainActor func testAsyncThrowingStream() {
let (_, continuation) = AsyncThrowingStream.makeStream(of: NonSendableKlass.self)
continuation.yield(NonSendableKlass())
let x = NonSendableKlass()
continuation.yield(x) // expected-error {{sending 'x' risks causing data races}}
// expected-note @-1 {{'x' used after being passed as a 'sending' parameter; Later uses could race}}
useValue(x) // expected-note {{access can happen concurrently}}
}
@MainActor func testAsyncThrowingStreamContinuation() {
let _ = AsyncThrowingStream(NonSendableKlass.self) { continuation in
continuation.yield(NonSendableKlass())
let x = NonSendableKlass()
continuation.yield(x) // expected-error {{sending 'x' risks causing data races}}
// expected-note @-1 {{'x' used after being passed as a 'sending' parameter; Later uses could race}}
useValue(x) // expected-note {{access can happen concurrently}}
}
}
@MainActor
func withUnsafeContinuation_1() async -> NonSendableKlass {
await withUnsafeContinuation { continuation in
continuation.resume(returning: NonSendableKlass())
}
}
func withUnsafeContinuation_1a() async -> NonSendableKlass {
await withUnsafeContinuation { continuation in
continuation.resume(returning: NonSendableKlass())
}
}
@MainActor
func withUnsafeContinuation_2() async -> NonSendableKlass {
await withUnsafeContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
}
func withUnsafeContinuation_2a() async -> NonSendableKlass {
await withUnsafeContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
}
@MainActor
func withUnsafeContinuation_3() async {
// x is main actor isolated since withUnsafeContinuation is #isolated.
let x = await withUnsafeContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
await useValueAsync(x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{sending main actor-isolated 'x' to nonisolated global function 'useValueAsync' risks causing data races between nonisolated and main actor-isolated uses}}
}
func withUnsafeContinuation_3a() async {
let x = await withUnsafeContinuation { continuation in
let x = NonSendableKlass()
continuation.resume(returning: x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{'x' used after being passed as a 'sending' parameter}}
useValue(x) // expected-note {{access can happen concurrently}}
}
await useValueAsync(x)
}
@MainActor
func withUnsafeContinuation_4() async {
// x is main actor isolated since withUnsafeContinuation is #isolated.
let y = NonSendableKlass()
let x = await withUnsafeContinuation { continuation in
continuation.resume(returning: y)
// expected-error @-1 {{sending 'y' risks causing data races}}
// expected-note @-2 {{main actor-isolated 'y' is passed as a 'sending' parameter}}
useValue(y)
}
await useValueAsync(x)
// expected-error @-1 {{sending 'x' risks causing data races}}
// expected-note @-2 {{sending main actor-isolated 'x' to nonisolated global function 'useValueAsync' risks causing data races between nonisolated and main actor-isolated uses}}
}
func withUnsafeContinuation_4a() async {
// x is main actor isolated since withUnsafeContinuation is #isolated.
let y = NonSendableKlass()
let x = await withUnsafeContinuation { continuation in
continuation.resume(returning: y)
// expected-error @-1 {{sending 'y' risks causing data races}}
// expected-note @-2 {{task-isolated 'y' is passed as a 'sending' parameter}}
useValue(y)
}
await useValueAsync(x)
}
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