Fixing ClearNonLiveTransition bug in combination with AccessorPairs.

src/objects.cc

 // Copyright 2012 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 7374 matching lines @@
           } else if (!getter->IsTheHole()) {
             keep_entry = true;
           }
           Object* setter = accessors->setter();
           if (setter->IsMap()) {
             if (ClearBackPointer(heap, setter)) {
               accessors->set_setter(heap->the_hole_value());
             } else {
               keep_entry = true;
             }
-          } else if (!getter->IsTheHole()) {
+          } else if (!setter->IsTheHole()) {
             keep_entry = true;
           }
         } else {
           keep_entry = true;
         }
         break;
       }
       case NORMAL:
       case FIELD:
       case CONSTANT_FUNCTION:
@@ skipping 5870 matching lines @@
   set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER);
   set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER);
   set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER);
   set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER);
   set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER);
   set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER);
   set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER);
 }
 
 } }  // namespace v8::internal