This is a little experiment to move Failure to a superclass above Object...

src/ia32/macro-assembler-ia32.cc

 // Copyright 2006-2009 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 1089 matching lines @@
   Object* result = NULL;
   ExternalReference extensions_address =
         ExternalReference::handle_scope_extensions_address();
   Label write_back;
   mov(scratch, Operand::StaticVariable(extensions_address));
   cmp(Operand(scratch), Immediate(0));
   j(equal, &write_back);
   push(saved);
   if (gc_allowed) {
     CallRuntime(Runtime::kDeleteHandleScopeExtensions, 0);
+    { TryAllocation t =
+          TryCallRuntime(Runtime::kDeleteHandleScopeExtensions, 0);
+      if (!t->ToObject(&result)) return t;
+    }
   } else {
-    result = TryCallRuntime(Runtime::kDeleteHandleScopeExtensions, 0);
-    if (result->IsFailure()) return result;
   }
   pop(saved);
 
   bind(&write_back);
   ExternalReference limit_address =
         ExternalReference::handle_scope_limit_address();
   pop(Operand::StaticVariable(limit_address));
   ExternalReference next_address =
         ExternalReference::handle_scope_next_address();
   pop(Operand::StaticVariable(next_address));
@@ skipping 549 matching lines @@
 
   // Check that the code was patched as expected.
   ASSERT(masm_.pc_ == address_ + size_);
   ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32