PgBouncer seems to implement some, but not all, of the postgres protocol. Specifically, I was running into this error when trying to query it:

Db(DbError {
    severity: "ERROR",
    parsed_severity: None,
    code: ProtocolViolation,
    message: "unsupported pkt type: 80",
    detail: None,
    hint: None,
    position: None,
    where_: None,
    schema: None,
    table: None,
    column: None,
    datatype: None,
    constraint: None,
    file: None,
    line: None,
    routine: None
})

The error message is from PgBouncer internals (admin.c:1365). Basically, looks like the 'P' frame isn't handled. This is generated from postgres_protocol::messages::frontend::parse.

Any suggestions on how to resolve?