v3rpc: force RangeEnd=nil if length is 0
gRPC will replace empty strings with nil, but for the embedded case it's
possible for []byte{} to slip in and confuse the single key / >= key
watch logic.
@@ -171,6 +171,11 @@ func (sws *serverWatchStream) recvLoop() error {
// \x00 is the smallest key
creq.Key = []byte{0}
}
+ if len(creq.RangeEnd) == 0 {
+ // force nil since watchstream.Watch distinguishes
+ // between nil and []byte{} for single key / >=
+ creq.RangeEnd = nil
+ }
if len(creq.RangeEnd) == 1 && creq.RangeEnd[0] == 0 {
// support >= key queries
creq.RangeEnd = []byte{}
