nil pointer fix

client/helpers/bgSendHelper.go

@@ -126,19 +126,23 @@ func attemptSendJob(job *client.SendJob) (int, error) {
 	}
 
 	for i, srv := range job.Servers {
-		// Prepare for server
-		var packedUsrMsg *meowlib.PackedUserMessage
-		err := proto.Unmarshal(data, packedUsrMsg)
-		if err != nil {
-			// todo
-			return -1, err
-		}
-		PackMessageForServer(packedUsrMsg, srv.GetUid())
-
 		if job.Retries[i] >= maxRetriesPerServer {
 			continue // this server is exhausted
 		}
-		_, err = meowlib.HttpPostMessage(srv.Url, data, timeout)
+
+		// Unmarshal the stored PackedUserMessage and wrap it for this server.
+		packedUsrMsg := &meowlib.PackedUserMessage{}
+		if err := proto.Unmarshal(data, packedUsrMsg); err != nil {
+			return -1, err
+		}
+		serverData, errTxt, packErr := PackMessageForServer(packedUsrMsg, srv.GetUid())
+		if packErr != nil {
+			logger.Error().Err(packErr).Str("errTxt", errTxt).Str("url", srv.Url).Msg("attemptSendJob: PackMessageForServer")
+			job.Retries[i]++
+			continue
+		}
+
+		_, err = meowlib.HttpPostMessage(srv.Url, serverData, timeout)
 		if err != nil {
 			logger.Warn().Err(err).Str("url", srv.Url).Int("retry", job.Retries[i]+1).Msg("attemptSendJob: POST failed")
 			job.Retries[i]++