Fix for issue 28196 - constant interceptors for mixin applications

tests/html/custom/mirrors_2_test.dart

+// Copyright (c) 2013, 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.
+
+library tests.html.mirrors_2_test;
+
+@MirrorsUsed(targets: "tests.html.mirrors_2_test")
+import 'dart:mirrors';
+import 'dart:html';
+import 'package:expect/expect.dart' show NoInline;
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import '../utils.dart';
+
+/// Regression test for http://dartbug/28196
+///
+/// The constructor of a mixin application of a subclass of a Html element is
+/// normally not used. With mirrors the constructor can become available. The
+/// body of the factory has a 'receiver' with an exact type that is the mixin
+/// application. The constructor body functions of the superclasses are called
+/// using the interceptor calling convention. This creates an interceptor
+/// constant of the mixin application type.  In issue 28196 the constant has a
+/// name containing '+' symbols, causing the program to crash during
+/// initializing the constant pool.
+
+main() {
+  useHtmlConfiguration();
+
+  var registered = false;
+  setUp(() => customElementsReady.then((_) {
+        if (!registered) {
+          registered = true;
+          document.registerElement(A.tag, A);
+          document.registerElement(B.tag, B);
+        }
+      }));
+
+  test('reflectClass', () {
+    expect('AA', new A().token());
+    expect('MM', new B().token());
+    reflectClass(B);
+  });
+}
+
+class A extends HtmlElement {
+  static final tag = 'x-a';
+  factory A() => new Element.tag(tag);
+
+  A.created() : super.created() {
+    // This function must not be inlined otherwise there is no reference to the
+    // interceptor constant. The `@NoInline()` annotation does not seem reliable
+    // on generative constructor bodies.
+    try {
+      uninlinedMethod();
+      uninlinedMethod();
+      uninlinedMethod();
+    } finally {
+      uninlinedMethod();
+      uninlinedMethod();
+      uninlinedMethod();
+    }
+  }
+  @NoInline()
+  uninlinedMethod() {}
+
+  token() => 'AA';
+}
+
+class B extends A with M {
+  static final tag = 'x-b';
+  factory B() => new Element.tag(tag);
+  B.created() : super.created();
+}
+
+class M {
+  token() => 'MM';
+}