[dart2js] Treat classes instantiated by a NativeBehavior as native.

fishythefish · commit-bot@chromium.org · commit 5148afa2fa6e · 2019-08-29T00:53:55.000Z
Change-Id: Ib1d19a6047492cd1a0e0d93e45107eb74f1b4306 Bug: #37576 Fixes: #37576 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/114466 Reviewed-by: Stephen Adams <sra@google.com> Commit-Queue: Mayank Patke <fishythefish@google.com>
diff --git a/pkg/compiler/lib/src/native/enqueue.dart b/pkg/compiler/lib/src/native/enqueue.dart
@@ -112,6 +112,11 @@ abstract class NativeEnqueuerBase implements NativeEnqueuer {
             _dartTypes.isSubtype(type,
                 _elementEnvironment.getRawType(_commonElements.jsArrayClass))) {
           registerInstantiation(type);
+        } else if (_dartTypes.isSubtype(
+            type,
+            _elementEnvironment
+                .getRawType(_commonElements.jsJavaScriptObjectClass))) {
+          matchingClasses.add(type.element);
         }
         // TODO(johnniwinther): Improve spec string precision to handle type
         // arguments and implements relations that preserve generics. Currently
diff --git a/tests/compiler/dart2js_extra/37576_test.dart b/tests/compiler/dart2js_extra/37576_test.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:js/js.dart';
+
+@JS('jsFun')
+external set jsFun(Function fun);
+
+void main() {
+  jsFun = allowInterop(dartFun);
+}
+
+void dartFun() {}
