Parallel recompilation: fix off-by-one in deferred handle scope iteration.

src/api.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 6952 matching lines @@
 
 
 void HandleScopeImplementer::IterateThis(ObjectVisitor* v) {
 #ifdef DEBUG
   bool found_block_before_deferred = false;
 #endif
   // Iterate over all handles in the blocks except for the last.
   for (int i = blocks()->length() - 2; i >= 0; --i) {
     Object** block = blocks()->at(i);
     if (last_handle_before_deferred_block_ != NULL &&
-        (last_handle_before_deferred_block_ < &block[kHandleBlockSize]) &&
+        (last_handle_before_deferred_block_ <= &block[kHandleBlockSize]) &&
         (last_handle_before_deferred_block_ >= block)) {
       v->VisitPointers(block, last_handle_before_deferred_block_);
       ASSERT(!found_block_before_deferred);
 #ifdef DEBUG
       found_block_before_deferred = true;
 #endif
     } else {
       v->VisitPointers(block, &block[kHandleBlockSize]);
     }
   }
@@ skipping 84 matching lines @@
 
   v->VisitPointers(blocks_.first(), first_block_limit_);
 
   for (int i = 1; i < blocks_.length(); i++) {
     v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
   }
 }
 
 
 } }  // namespace v8::internal