Add missing trail argument when comparing cyclic type graphs (bug uncovered by hot reload).

runtime/vm/object.cc

 // 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.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 16711 matching lines @@
         if (!other_type_args.IsRaw(0, num_type_args)) {
           return false;
         }
       } else if (other_type_args.IsNull()) {
         // Ignore from_index.
         if (!type_args.IsRaw(0, num_type_args)) {
           return false;
         }
       } else if (!type_args.IsSubvectorEquivalent(other_type_args,
                                                   from_index,
-                                                  num_type_params)) {
+                                                  num_type_params,
+                                                  trail)) {
         return false;
       }
 #ifdef DEBUG
       if (from_index > 0) {
         // Verify that the type arguments of the super class match, since they
         // depend solely on the type parameters that were just verified to
         // match.
         ASSERT(type_args.Length() >= (from_index + num_type_params));
         ASSERT(other_type_args.Length() >= (from_index + num_type_params));
         AbstractType& type_arg = AbstractType::Handle(zone);
@@ skipping 5841 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart