Handle type checking of generic compile time constants.

tests/language/regress_14348_test.dart

Index: tests/language/regress_14348_test.dart
diff --git a/tests/language/regress_14348_test.dart b/tests/language/regress_14348_test.dart
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+// Copyright (c) 2014, 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.
+
+// Regression test for issue 14348.
+
+import "package:collection/equality.dart";
+
+main() {
+  const Equality<Iterable> eq = const UnorderedIterableEquality();
+  const Equality<Map<dynamic,Iterable>> mapeq =
+     const MapEquality<dynamic, dynamic>(values: eq);
+}