ObjectPool is also used on IA32 for deopt.

runtime/vm/disassembler.cc

Index: runtime/vm/disassembler.cc
diff --git a/runtime/vm/disassembler.cc b/runtime/vm/disassembler.cc
index 948c5fe750faaf91e3c0d55bf9b560c9988f0140..5ba92d94041b1d4ef50ceadd40e324f89d0b486c 100644
--- a/runtime/vm/disassembler.cc
+++ b/runtime/vm/disassembler.cc
@@ -205,14 +205,12 @@ void Disassembler::DisassembleCode(const Function& function, bool optimized) {
               code.GetPointerOffsetAt(i), addr, obj.ToCString());
   }
   THR_Print("}\n");
-
-  ASSERT(ObjectPool::Handle(code.GetObjectPool()).Length() == 0);
 #else
   ASSERT(code.pointer_offsets_length() == 0);
+#endif
 
   const ObjectPool& object_pool = ObjectPool::Handle(code.GetObjectPool());
   object_pool.DebugPrint();
-#endif
 
   THR_Print("PC Descriptors for function '%s' {\n", function_fullname);
   PcDescriptors::PrintHeaderString();