Constant HURRAY_ERR_TRANSPORT 

pub const HURRAY_ERR_TRANSPORT: HurrayStatus = -14;

A caller-supplied transport callback reported failure.

The handle is left usable: a callback that returns a failing status MUST NOT have moved any bytes (hurray-ffi’s transport contract, ADR-041 § 8), so the stream position is intact and the same call MAY be retried.