Fix a deoptimization bug.

src/deoptimizer.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 599 matching lines @@
     case Translation::FRAME:
     case Translation::DUPLICATE:
       UNREACHABLE();
       return;
 
     case Translation::REGISTER: {
       int input_reg = iterator->Next();
       intptr_t input_value = input_->GetRegister(input_reg);
       if (FLAG_trace_deopt) {
         PrintF(
-            "    0x%08" V8PRIxPTR ": [top + %d] <- 0x%08" V8PRIxPTR " ; %s\n",
+            "    0x%08" V8PRIxPTR ": [top + %d] <- 0x%08" V8PRIxPTR " ; %s ",
             output_[frame_index]->GetTop() + output_offset,
             output_offset,
             input_value,
             converter.NameOfCPURegister(input_reg));
+        reinterpret_cast<Object*>(input_value)->ShortPrint();
+        PrintF("\n");
       }
       output_[frame_index]->SetFrameSlot(output_offset, input_value);
       return;
     }
 
     case Translation::INT32_REGISTER: {
       int input_reg = iterator->Next();
       intptr_t value = input_->GetRegister(input_reg);
       bool is_smi = Smi::IsValid(value);
       if (FLAG_trace_deopt) {
@@ skipping 37 matching lines @@
     }
 
     case Translation::STACK_SLOT: {
       int input_slot_index = iterator->Next();
       unsigned input_offset =
           input_->GetOffsetFromSlotIndex(this, input_slot_index);
       intptr_t input_value = input_->GetFrameSlot(input_offset);
       if (FLAG_trace_deopt) {
         PrintF("    0x%08" V8PRIxPTR ": ",
                output_[frame_index]->GetTop() + output_offset);
-        PrintF("[top + %d] <- 0x%08" V8PRIxPTR " ; [esp + %d]\n",
+        PrintF("[top + %d] <- 0x%08" V8PRIxPTR " ; [esp + %d] ",
                output_offset,
                input_value,
                input_offset);
+        reinterpret_cast<Object*>(input_value)->ShortPrint();
+        PrintF("\n");
       }
       output_[frame_index]->SetFrameSlot(output_offset, input_value);
       return;
     }
 
     case Translation::INT32_STACK_SLOT: {
       int input_slot_index = iterator->Next();
       unsigned input_offset =
           input_->GetOffsetFromSlotIndex(this, input_slot_index);
       intptr_t value = input_->GetFrameSlot(input_offset);
@@ skipping 772 matching lines @@
 
 void DeoptimizedFrameInfo::Iterate(ObjectVisitor* v) {
   v->VisitPointer(BitCast<Object**>(&function_));
   v->VisitPointers(parameters_, parameters_ + parameters_count_);
   v->VisitPointers(expression_stack_, expression_stack_ + expression_count_);
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal