Do not dereference handles during relocation.

src/hydrogen.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 493 matching lines @@
   }
 
   int visited_count_;
   ZoneList<HBasicBlock*> stack_;
   BitVector reachable_;
   HBasicBlock* dont_visit_;
 };
 
 
 void HGraph::Verify(bool do_full_verify) const {
+  Heap::RelocationLock(isolate()->heap());
   ALLOW_HANDLE_DEREF(isolate(), "debug mode verification");
   for (int i = 0; i < blocks_.length(); i++) {
     HBasicBlock* block = blocks_.at(i);
 
     block->Verify();
 
     // Check that every block contains at least one node and that only the last
     // node is a control instruction.
     HInstruction* current = block->first();
     ASSERT(current != NULL && current->IsBlockEntry());
@@ skipping 11395 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal