Redirecting constructor may not have function body

tests/language/constructor_redirect2_test.dart

+// Copyright (c) 2012, 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.
+// Redirection constructors must not have a function body.
+
+class A {
+  var x;
+  A(this.x) {}
+
+  // Redirecting constructor must not have a function body.
+  A.illegalBody(x) : this(3) {}      /// 01: compile-time error
+
+  // Redirecting constructor must not initialize any fields.
+  A.illegalInit() : this(3), x = 5;  /// 02: compile-time error
+
+  // Redirecting constructor must not have initializing formal parameters.
+  A.illegalFormal(this.x) : this(3);  /// 03: compile-time error
+
+  // Redirection constructors must not call super constructor.
+  A.illegalSuper() : this(3), super(3);  /// 04: compile-time error
+}
+
+main() {
+  new A(3);
+  new A.illegalBody(10);         /// 01: continued
+  new A.illegalInit(10);         /// 02: continued
+  new A.illegalFormal(10);       /// 03: continued
+  new A.illegalSuper(10);        /// 04: continued
+}