a distributed actor's convenience init should be treated as nonisolated

Author: kavon

lib/Sema/TypeCheckConcurrency.cpp

@@ -3230,9 +3230,9 @@ ActorIsolation ActorIsolationRequest::evaluate(
     }
   }
 
-  // An actor's convenience init is assumed to be actor-independent.
+  // Every actor's convenience init is assumed to be actor-independent.
   if (auto nominal = value->getDeclContext()->getSelfNominalTypeDecl())
-    if (nominal->isActor())
+    if (nominal->isAnyActor())
       if (auto ctor = dyn_cast<ConstructorDecl>(value))
         if (ctor->isConvenienceInit())
           defaultIsolation = ActorIsolation::forIndependent();

test/Distributed/distributed_actor_isolation.swift

@@ -172,3 +172,13 @@ func test_params(
   _ = try await distributed.distInt(int: 42) // ok
   _ = try await distributed.dist(notCodable: .init())
 }
+
+// Actor initializer isolation (through typechecking only!)
+distributed actor DijonMustard {
+  convenience init(conv: ActorTransport) {
+    self.init(transport: conv)
+    self.f() // expected-error {{actor-isolated instance method 'f()' can not be referenced from a non-isolated context}}
+  }
+
+  func f() {} // expected-note {{distributed actor-isolated instance method 'f()' declared here}}
+}