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// RUN: %target-swift-frontend -verify -disable-availability-checking -strict-concurrency=complete -verify-additional-prefix region-isolation- -emit-sil -o /dev/null %s
// REQUIRES: concurrency
// REQUIRES: asserts
@globalActor
actor MyActor {
static let shared = MyActor()
@MyActor static var ns: NotSendable?
@MyActor static func ohNo() { ns!.x += 1 }
}
@globalActor
actor YourActor {
static let shared = YourActor()
@YourActor static var ns: NotSendable?
@YourActor static func ohNo() { ns!.x += 1 }
}
// expected-complete-note@+1 3{{class 'NotSendable' does not conform to the 'Sendable' protocol}}
class NotSendable {
var x: Int = 0
@MyActor init() {
MyActor.ns = self
}
init(x: Int) {
self.x = x
}
@MyActor func stash() {
MyActor.ns = self
}
}
@MyActor func exhibitRace1() async {
let ns = NotSendable(x: 0)
MyActor.ns = ns
await { @YourActor in
// expected-region-isolation-warning @+3 {{sending 'ns' risks causing data races}}
// expected-region-isolation-note @+2 {{global actor 'MyActor'-isolated 'ns' is captured by a global actor 'YourActor'-isolated closure. global actor 'YourActor'-isolated uses in closure may race against later global actor 'MyActor'-isolated uses}}
// expected-complete-warning@+1 {{capture of 'ns' with non-sendable type 'NotSendable' in an isolated closure; this is an error in the Swift 6 language mode}}
YourActor.ns = ns
}()
await withTaskGroup(of: Void.self) {
$0.addTask {
await MyActor.ohNo()
}
$0.addTask {
await YourActor.ohNo()
}
}
}
@MyActor func exhibitRace2() async {
let ns = NotSendable(x: 0)
ns.stash()
await { @YourActor in
// expected-region-isolation-warning @+3 {{sending 'ns' risks causing data races}}
// expected-region-isolation-note @+2 {{global actor 'MyActor'-isolated 'ns' is captured by a global actor 'YourActor'-isolated closure. global actor 'YourActor'-isolated uses in closure may race against later global actor 'MyActor'-isolated uses}}
// expected-complete-warning@+1 {{capture of 'ns' with non-sendable type 'NotSendable' in an isolated closure; this is an error in the Swift 6 language mode}}
YourActor.ns = ns
}()
await withTaskGroup(of: Void.self) {
$0.addTask {
await MyActor.ohNo()
}
$0.addTask {
await YourActor.ohNo()
}
}
}
@MyActor func exhibitRace3() async {
let ns = NotSendable()
await { @YourActor in
// expected-region-isolation-warning @+3 {{sending 'ns' risks causing data races}}
// expected-region-isolation-note @+2 {{global actor 'MyActor'-isolated 'ns' is captured by a global actor 'YourActor'-isolated closure. global actor 'YourActor'-isolated uses in closure may race against later global actor 'MyActor'-isolated uses}}
// expected-complete-warning@+1 {{capture of 'ns' with non-sendable type 'NotSendable' in an isolated closure; this is an error in the Swift 6 language mode}}
YourActor.ns = ns
}()
await withTaskGroup(of: Void.self) {
$0.addTask {
await MyActor.ohNo()
}
$0.addTask {
await YourActor.ohNo()
}
}
}
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