inheriting std::variant as table data segfaults

[b1bart]

using v1.6.1 built locally on mac

this code appears to cause a segfault in eosio-cpp

goodbye.cpp:

#include <eosio/eosio.hpp>
#include <eosio/name.hpp>
#include <variant>

using namespace eosio;

class [[eosio::contract]] goodbye : public eosio::contract {
   public:
      goodbye(name receiver, name code, datastream<const char*> ds)
      :eosio::contract(receiver, code, ds)
      ,_foo(receiver, receiver.value)
      {}

      struct foo_v1 {
         uint64_t primary;
      };

      struct [[eosio::table]] foo : public std::variant<foo_v1> {
         uint64_t primary_key()const {
            return std::visit([](const auto& f){return f.primary; }, *this);
         }
      };

      using foo_table = eosio::multi_index<"foos"_n, foo>;

      foo_table _foo;

      [[eosio::action]]
      void hi(name nm) {
      }
};

[jeffreyssmith2nd]

Confirmed on 1.6.2

[jeffreyssmith2nd]

Fixed in 1.6.3