Fix reintroduction of global variables that have been deleted.

src/hydrogen.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 3352 matching lines @@
 // superclass of Assignment and CountOperation, we cannot just pass the
 // owning expression instead of position and ast_id separately.
 void HGraphBuilder::HandleGlobalVariableAssignment(Variable* var,
                                                    HValue* value,
                                                    int position,
                                                    int ast_id) {
   LookupResult lookup;
   LookupGlobalPropertyCell(var, &lookup, true);
   CHECK_BAILOUT;
 
+  bool check_hole = !lookup.IsDontDelete() || lookup.IsReadOnly();
   Handle<GlobalObject> global(graph()->info()->global_object());
   Handle<JSGlobalPropertyCell> cell(global->GetPropertyCell(&lookup));
-  HInstruction* instr = new HStoreGlobal(value, cell);
+  HInstruction* instr = new HStoreGlobal(value, cell, check_hole);
   instr->set_position(position);
   AddInstruction(instr);
   if (instr->HasSideEffects()) AddSimulate(ast_id);
 }
 
 
 void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
   Expression* target = expr->target();
   VariableProxy* proxy = target->AsVariableProxy();
   Variable* var = proxy->AsVariable();
@@ skipping 2492 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify();
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal