That the serialization mechanism is not transparent and for each individual external pointer serialization one has to explicitly add refhook. The expternal point, when deserialized shall be NULL and thus not really working anyway.
By not serializing it, we can gain some time sicne the trace will fail sooner in the chain.
Another posibility is to modify the source and keep the expressions that created the external pointers and reproduce code.
That the serialization mechanism is not transparent and for each individual external pointer serialization one has to explicitly add refhook. The expternal point, when deserialized shall be NULL and thus not really working anyway.
By not serializing it, we can gain some time sicne the trace will fail sooner in the chain.
Another posibility is to modify the source and keep the expressions that created the external pointers and reproduce code.