Follow-up to CLs 2933723002 and 2932973003.

tests/language/constants_test.dart

+// Copyright (c) 2017, 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.
+
+class C {
+  factory C() => null;
+}
+
+const //# 01: compile-time error
+t() => null;
+
+const //# 02: compile-time error
+get v => null;
+
+main() {
+  const //# 03: compile-time error
+      dynamic x = t();
+  const y = const C(); //# 04: compile-time error
+  const //# 05: compile-time error
+      dynamic z = v;
+}