Redis Some potential error handling bugs

While reading the newest codes, I found several suspicious codes that could be potential error handling bugs.

I found that there are many variables with the data type "connection" whose member fd is used directly without being checked if they equal to -1.

To be specific, I found the above problem in the following functions: connSocketWrite, connSocketWritev, connSocketRead, connSocketEventHandler, connSocketAddr, connSendTimeout, connRecvTimeout, connCreateAcceptedUnix, connUnixSyncWrite, connUnixSyncReadLine, connSocketSyncWrite, connSocketSyncRead, connSocketSyncReadLine.

They are currently not in danger of triggering any error, but there is still a risk that their errors be triggered as the code is updated. Will you consider adding error handling for them in a future update?