Forwarding constructors are never const

runtime/vm/class_finalizer.cc

 // 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.
 
 #include "vm/class_finalizer.h"
 
 #include "vm/flags.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/longjump.h"
@@ skipping 1358 matching lines @@
       String& ctor_name = String::Handle(func.name());
       ctor_name = String::SubString(ctor_name, super_name.Length());
       String& clone_name =
           String::Handle(String::Concat(mixin_name, ctor_name));
       clone_name = Symbols::New(clone_name);
 
       const Function& clone = Function::Handle(
           Function::New(clone_name,
                         func.kind(),
                         func.is_static(),
-                        func.is_const(),
-                        func.is_abstract(),
-                        func.is_external(),
+                        false,  // Not const.
+                        false,  // Not abstract.
+                        false,  // Not external.
                         mixin_app,
                         mixin_app.token_pos()));
 
       clone.set_num_fixed_parameters(func.num_fixed_parameters());
       clone.SetNumOptionalParameters(func.NumOptionalParameters(),
                                      func.HasOptionalPositionalParameters());
       clone.set_result_type(dynamic_type);
 
       const int num_parameters = func.NumParameters();
       // The cloned ctor shares the parameter names array with the
@@ skipping 774 matching lines @@
   expected_name ^= String::New("_offset");
   ASSERT(String::EqualsIgnoringPrivateKey(name, expected_name));
   field ^= fields_array.At(2);
   ASSERT(field.Offset() == TypedDataView::length_offset());
   name ^= field.name();
   ASSERT(name.Equals("length"));
 #endif
 }
 
 }  // namespace dart