Fix TryICData to create ICData with a valid arguments decriptor.

runtime/vm/il_printer.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/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 #include "vm/parser.h"
 
@@ skipping 145 matching lines @@
     f->Print(" <%p>", static_cast<void*>(target.raw()));
   }
   f->Print("]");
 }
 
 
 void FlowGraphPrinter::PrintICData(const ICData& ic_data) {
   char buffer[1024];
   BufferFormatter f(buffer, sizeof(buffer));
   PrintICDataHelper(&f, ic_data);
-  OS::Print("%s\n", buffer);
+  OS::Print("%s ", buffer);
+  const Array& a = Array::Handle(ic_data.arguments_descriptor());
+  OS::Print(" arg-desc %" Pd "\n", a.Length());
 }
 
 
 static void PrintUse(BufferFormatter* f, const Definition& definition) {
   if (definition.is_used()) {
     if (definition.HasSSATemp()) {
       if (definition.HasPairRepresentation()) {
         f->Print("v%" Pd ", v%" Pd "", definition.ssa_temp_index(),
                                        definition.ssa_temp_index() + 1);
       } else {
@@ skipping 892 matching lines @@
 }
 
 const char* Environment::ToCString() const {
   char buffer[1024];
   BufferFormatter bf(buffer, 1024);
   PrintTo(&bf);
   return Isolate::Current()->current_zone()->MakeCopyOfString(buffer);
 }
 
 }  // namespace dart