Serialization of containers BROKEN

Serialization of std::vector/deque/list<T> are very broken for trivial T, non trivial T is ok though. Surprisingly tests like "test/rpc_barrier" succeed despite leveraging broken code.

view<T> is not affected since it takes a different serialization path than containers.

I'm already sitting on the fix and gnarly regression test for this, just posting an issue to document bug's existence. Will be closing shortly.