Error when sending text queries

[jdangerx]

I'm trying to send an unprepared text query to a MySQL database. I'm creating a query, %Mariaex.Query{type: :text, statement: "SELECT 1, 2, 3"}, as a test - and it's causing an error:

iex(2)> Mariaex.execute(prod, %Mariaex.Query{type: :text, statement: "SELECT 1, 2, 3"}, [])
** (FunctionClauseError) no function clause matching in Mariaex.Protocol.handle_error/3
** (EXIT from #PID<0.819.0>) an exception was raised:
    ** (DBConnection.ConnectionError) client #PID<0.819.0> stopped: ** (FunctionClauseError) no function clause matching in Mariaex.Protocol.handle_error/3
    (mariaex) lib/mariaex/protocol.ex:397: Mariaex.Protocol.handle_error({:packet, 1, 1, {:column_count, 3}, <<3>>}, %Mariaex.Query{binary_as: nil, connection_ref: nil, name: "", parameter_types: [], reserved?: false, statement: "SELECT 1, 2, 3", statement_id: nil, type: :text, types: []}, %Mariaex.Protocol{binary_as: :field_type_var_string, buffer: "", cache: 2388016, catch_eof: false, connection_id: #PID<0.821.0>, connection_ref: #Reference<0.0.1.4568>, lru_cache: {100, 2392118}, opts: [socket_options: [], sock_type: :tcp, cache_size: 100, timeout: 5000, hostname: "<hostname>", port: 3306, username: "<username>", password: "<pass>", database: "<dbname>"], protocol57: false, rows: [], seqnum: 0, sock: {Mariaex.Connection.Tcp, #Port<0.18151>}, ssl_conn_state: :not_used, state: :column_count, state_data: nil, timeout: 5000})
    (db_connection) lib/db_connection.ex:739: DBConnection.handle/4
    (db_connection) lib/db_connection.ex:797: anonymous fn/4 in DBConnection.run_execute/4
    (db_connection) lib/db_connection.ex:882: DBConnection.run_begin/3
    (db_connection) lib/db_connection.ex:830: DBConnection.run_meter/3
    (db_connection) lib/db_connection.ex:502: DBConnection.execute/4
    (mariaex) lib/mariaex.ex:228: Mariaex.execute/4
    (stdlib) erl_eval.erl:670: :erl_eval.do_apply/6

        (db_connection) lib/db_connection/connection.ex:238: DBConnection.Connection.handle_cast/2
        (connection) lib/connection.ex:812: Connection.handle_async/3
        (stdlib) gen_server.erl:615: :gen_server.try_dispatch/4
        (stdlib) gen_server.erl:681: :gen_server.handle_msg/5
        (stdlib) proc_lib.erl:240: :proc_lib.init_p_do_apply/3

So it looks like we have a pattern match fail here:
https://github.com/xerions/mariaex/blob/master/lib/mariaex/protocol.ex#L394-L399

But why would the packet being sent back have the wrong pattern?