potential race condition in removing/adding same node?

[skygragon]

say we remove node the add it back as non-voting, seems there would be race condition to cause a crash?

1. append log "remove node A"
2. append log "add non-voting node A" => new node memory
3. later apply log "remove node A" => free node memory
4. apply log "add non-voting node A" => update node memory (oops!)