Case
TorError.ioError(_:)
A POSIX I/O operation against the control socket or data directory failed.
case ioError(String)
Discussion
Payload carries a combined description of the syscall + errno string (e.g. "read: Connection reset by peer"). Most commonly seen when Tor exits during an active control command or the data directory becomes unwritable. Not generally retryable; inspect the payload for classification.