Fixes #27960

pkg/dev_compiler/test/codegen/language/call_function2_test.dart

+// Copyright (c) 2016, 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:expect/expect.dart";
+
+typedef Object Func(Object x);
+
+class Bar {
+  int x = 42;
+
+  Object call(Object x) {
+    return 'Bar $x';
+  }
+}
+
+Object baz(Object x) => x;
+
+var map = <String, Func>{
+  'baz': baz,
+  'bar': new Bar()
+};
+
+Object test(String str, Object arg) {
+  return map[str].call(arg);
+}
+
+void main() {
+  Expect.equals(42, test('baz', 42));
+  Expect.equals('Bar 42', test('bar', 42));
+}