[pull] swiftwasm-release/5.7 from release/5.7

lib/SILGen/SILGenProlog.cpp

@@ -768,6 +768,15 @@ SILValue SILGenFunction::emitLoadActorExecutor(SILLocation loc,
   else
     actorV = actor.borrow(*this, loc).getValue();
 
+  // Open an existential actor type.
+  CanType actorType = actor.getType().getASTType();
+  if (actorType->isExistentialType()) {
+    actorType = OpenedArchetypeType::get(
+        actorType, F.getGenericSignature())->getCanonicalType();
+    SILType loweredActorType = getLoweredType(actorType);
+    actorV = B.createOpenExistentialRef(loc, actorV, loweredActorType);
+  }
+
   // For now, we just want to emit a hop_to_executor directly to the
   // actor; LowerHopToActor will add the emission logic necessary later.
   return actorV;

lib/Sema/TypeCheckProtocol.cpp

@@ -3060,6 +3060,11 @@ Optional<ActorIsolation> ConformanceChecker::checkActorIsolation(
     diagnoseNonSendableTypesInReference(
         getConcreteWitness(), DC, loc, SendableCheckReason::Conformance);
 
+    // If the witness is accessible across actors, we don't need to consider it
+    // isolated.
+    if (isAccessibleAcrossActors(witness, refResult.isolation, DC))
+      return None;
+
     if (refResult.isolation.isActorIsolated() && isAsyncDecl(requirement) &&
         !isAsyncDecl(witness))
       return refResult.isolation;

stdlib/public/BackDeployConcurrency/CheckedContinuation.swift

@@ -119,7 +119,7 @@ internal final class CheckedContinuationCanary: @unchecked Sendable {
 /// you can replace one with the other in most circumstances,
 /// without making other changes.
 @available(SwiftStdlib 5.1, *)
-public struct CheckedContinuation<T, E: Error> {
+public struct CheckedContinuation<T, E: Error>: Sendable {
   private let canary: CheckedContinuationCanary
 
   /// Creates a checked continuation from an unsafe continuation.
@@ -186,9 +186,6 @@ public struct CheckedContinuation<T, E: Error> {
   }
 }
 
-@available(SwiftStdlib 5.1, *)
-extension CheckedContinuation: Sendable where T: Sendable { }
-
 @available(SwiftStdlib 5.1, *)
 extension CheckedContinuation {
   /// Resume the task awaiting the continuation by having it either

stdlib/public/BackDeployConcurrency/PartialAsyncTask.swift

@@ -69,7 +69,7 @@ public struct UnownedJob: Sendable {
 /// without making other changes.
 @available(SwiftStdlib 5.1, *)
 @frozen
-public struct UnsafeContinuation<T, E: Error> {
+public struct UnsafeContinuation<T, E: Error>: Sendable {
   @usableFromInline internal var context: Builtin.RawUnsafeContinuation
 
   @_alwaysEmitIntoClient
@@ -144,9 +144,6 @@ public struct UnsafeContinuation<T, E: Error> {
   }
 }
 
-@available(SwiftStdlib 5.1, *)
-extension UnsafeContinuation: Sendable where T: Sendable { }
-
 @available(SwiftStdlib 5.1, *)
 extension UnsafeContinuation {
   /// Resume the task that's awaiting the continuation

stdlib/public/Concurrency/CheckedContinuation.swift

@@ -119,7 +119,7 @@ internal final class CheckedContinuationCanary: @unchecked Sendable {
 /// you can replace one with the other in most circumstances,
 /// without making other changes.
 @available(SwiftStdlib 5.1, *)
-public struct CheckedContinuation<T, E: Error> {
+public struct CheckedContinuation<T, E: Error>: Sendable {
   private let canary: CheckedContinuationCanary
 
   /// Creates a checked continuation from an unsafe continuation.
@@ -186,9 +186,6 @@ public struct CheckedContinuation<T, E: Error> {
   }
 }
 
-@available(SwiftStdlib 5.1, *)
-extension CheckedContinuation: Sendable where T: Sendable { }
-
 @available(SwiftStdlib 5.1, *)
 extension CheckedContinuation {
   /// Resume the task awaiting the continuation by having it either

stdlib/public/Concurrency/PartialAsyncTask.swift

@@ -69,7 +69,7 @@ public struct UnownedJob: Sendable {
 /// without making other changes.
 @available(SwiftStdlib 5.1, *)
 @frozen
-public struct UnsafeContinuation<T, E: Error> {
+public struct UnsafeContinuation<T, E: Error>: Sendable {
   @usableFromInline internal var context: Builtin.RawUnsafeContinuation
 
   @_alwaysEmitIntoClient
@@ -144,9 +144,6 @@ public struct UnsafeContinuation<T, E: Error> {
   }
 }
 
-@available(SwiftStdlib 5.1, *)
-extension UnsafeContinuation: Sendable where T: Sendable { }
-
 @available(SwiftStdlib 5.1, *)
 extension UnsafeContinuation {
   /// Resume the task that's awaiting the continuation

stdlib/public/Concurrency/TaskGroup.swift

@@ -65,6 +65,7 @@ import Swift
 /// use the `withThrowingTaskGroup(of:returning:body:)` method instead.
 @available(SwiftStdlib 5.1, *)
 @_silgen_name("$ss13withTaskGroup2of9returning4bodyq_xm_q_mq_ScGyxGzYaXEtYar0_lF")
+@_unsafeInheritExecutor
 @inlinable
 public func withTaskGroup<ChildTaskResult, GroupResult>(
   of childTaskResultType: ChildTaskResult.Type,
@@ -157,6 +158,7 @@ public func withTaskGroup<ChildTaskResult, GroupResult>(
 /// or to let the group rethrow the error.
 @available(SwiftStdlib 5.1, *)
 @_silgen_name("$ss21withThrowingTaskGroup2of9returning4bodyq_xm_q_mq_Scgyxs5Error_pGzYaKXEtYaKr0_lF")
+@_unsafeInheritExecutor
 @inlinable
 public func withThrowingTaskGroup<ChildTaskResult, GroupResult>(
   of childTaskResultType: ChildTaskResult.Type,