ok: {"__rpcref": "0"}
ok: {"fooRef": {"__rpcref": "0"}, "fooJson": {"s": ""}}
ok: {"bar": {"fooRef": {"__rpcref": "0"}, "fooJson": {"s": ""}}}
ok: {"arr": []}
ok: {"a": 0}
ok: {"b": 42, "a": 3}
ok: {"baz":
 {"arr":
  [{"fooRef": {"__rpcref": "0"}, "fooJson": {"s": ""}},
   {"fooRef": {"__rpcref": "1"}, "fooJson": {"s": ""}}]}}
ok: {"a": [{"baz": {"arr": []}}, {"__rpcref": "0"}]}
ok: {"b": {"n": 42, "m": 0, "a": {"baz": {"arr": []}}}}
ok: {"a": [{"baz": {"arr": []}}, [{"a": [{"baz": {"arr": []}}, []]}]]}
ok: {"a": 42}
ok: "a"
ok: {}
Except.error "no inductive tag found"