From e8b870c7bae2d7d97193abd4ed0bd13b86bc50a1 Mon Sep 17 00:00:00 2001
From: e3dio <85405955+e3dio@users.noreply.github.com>
Date: Sat, 20 Nov 2021 12:37:46 -0700
Subject: [PATCH] Can't unsubscribe without subscriber (#1383)

---
 src/WebSocket.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/WebSocket.h b/src/WebSocket.h
index 68965fb..682ae11 100644
--- a/src/WebSocket.h
+++ b/src/WebSocket.h
@@ -247,6 +247,8 @@ public:
         );
 
         WebSocketData *webSocketData = (WebSocketData *) us_socket_ext(SSL, (us_socket_t *) this);
+        
+        if (!webSocketData->subscriber) { return false; }
 
         /* Cannot return numSubscribers as this is only for this particular websocket context */
         auto [ok, last] = webSocketContextData->topicTree->unsubscribe(webSocketData->subscriber, topic);