fix test failure in global_actor_inference_swift6.swift

Author: sophiapoirier

lib/Sema/TypeCheckDeclPrimary.cpp

@@ -2146,7 +2146,11 @@ class DeclChecker : public DeclVisitor<DeclChecker> {
     (void) VD->getPropertyWrapperAuxiliaryVariables();
     (void) VD->getPropertyWrapperInitializerInfo();
     (void) VD->getImplInfo();
-    (void)getActorIsolation(VD);
+    // Declarations inside types are handled in checkConformancesInContext() to
+    // avoid cycles involving associated type inference.
+    if (!VD->getDeclContext()->isTypeContext()) {
+      (void)getActorIsolation(VD);
+    }
 
     // Visit auxiliary decls first
     VD->visitAuxiliaryDecls([&](VarDecl *var) {

test/Concurrency/experimental_feature_strictconcurrency.swift

@@ -1,5 +1,5 @@
-// RUN: %target-typecheck-verify-swift -parse-as-library -enable-experimental-feature StrictConcurrency -enable-experimental-feature GlobalConcurrency
-// RUN: %target-typecheck-verify-swift -parse-as-library -enable-experimental-feature StrictConcurrency=complete -enable-experimental-feature GlobalConcurrency
+// RUN: %target-typecheck-verify-swift -disable-availability-checking -parse-as-library -enable-experimental-feature StrictConcurrency -enable-experimental-feature GlobalConcurrency
+// RUN: %target-typecheck-verify-swift -disable-availability-checking -parse-as-library -enable-experimental-feature StrictConcurrency=complete -enable-experimental-feature GlobalConcurrency
 // REQUIRES: concurrency
 
 class C1 { } // expected-note{{class 'C1' does not conform to the 'Sendable' protocol}}