improves error propagation in sync pipe cancellation

Signed-off-by: Oleh Dokuka <shadowgun@i.ua>

Author: OlegDokuka

rsocket-core/src/main/java/io/rsocket/core/RequestChannelResponderSubscriber.java

@@ -288,6 +288,7 @@ public void request(long n) {
   public void cancel() {
     long previousState = markInboundTerminated(STATE, this);
     if (isTerminated(previousState) || isInboundTerminated(previousState)) {
+      INBOUND_ERROR.lazySet(this, TERMINATED);
       return;
     }