Fix TryICData to create ICData with a valid arguments decriptor.

runtime/vm/flow_graph_optimizer.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/flow_graph_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
@@ skipping 120 matching lines @@
     }
   }
 
   for (intptr_t i = 0; i < class_ids.length(); i++) {
     if (class_ids[i] == kDynamicCid) {
       // Not all cid-s known.
       return false;
     }
   }
 
-  ArgumentsDescriptor args_desc(
-      Array::Handle(ArgumentsDescriptor::New(call->ArgumentCount(),
-                                             call->argument_names())));
+  const Array& args_desc_array = Array::Handle(
+      ArgumentsDescriptor::New(call->ArgumentCount(), call->argument_names()));
+  ArgumentsDescriptor args_desc(args_desc_array);
   const Class& receiver_class = Class::Handle(
       Isolate::Current()->class_table()->At(class_ids[0]));
   const Function& function = Function::Handle(
       Resolver::ResolveDynamicForReceiverClass(
           receiver_class,
           call->function_name(),
           args_desc));
   if (function.IsNull()) {
     return false;
   }
   // Create new ICData, do not modify the one attached to the instruction
   // since it is attached to the assembly instruction itself.
   // TODO(srdjan): Prevent modification of ICData object that is
   // referenced in assembly code.
   ICData& ic_data = ICData::ZoneHandle(ICData::New(
       flow_graph_->parsed_function().function(),
       call->function_name(),
-      Object::empty_array(),  // Dummy argument descriptor.
+      args_desc_array,
       call->deopt_id(),
       class_ids.length()));
   if (class_ids.length() > 1) {
     ic_data.AddCheck(class_ids, function);
   } else {
     ASSERT(class_ids.length() == 1);
     ic_data.AddReceiverCheck(class_ids[0], function);
   }
   call->set_ic_data(&ic_data);
   return true;
@@ skipping 8966 matching lines @@
   }
 
   // Insert materializations at environment uses.
   for (intptr_t i = 0; i < exits.length(); i++) {
     CreateMaterializationAt(exits[i], alloc, alloc->cls(), *slots);
   }
 }
 
 
 }  // namespace dart