From 1beffb1bfd74565349b6c45772fd8a649be2f696 Mon Sep 17 00:00:00 2001
From: Hornwitser <github@hornwitser.no>
Date: Fri, 8 May 2020 18:09:48 +0200
Subject: [PATCH] Fix crash on hartbeat on closing connection

Fix heartbeat incorrectly asserting it cannot be sent on a connection in
the closing state.
---
 lib/link/connectors.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/link/connectors.js b/lib/link/connectors.js
index 1b6b4d78..764c5745 100644
--- a/lib/link/connectors.js
+++ b/lib/link/connectors.js
@@ -43,7 +43,7 @@ class WebSocketBaseConnector extends events.EventEmitter {
 	}
 
 	_doHeartbeat() {
-		this._check(["connected"]);
+		this._check(["connected", "closing"]);
 		if (Date.now() - this._lastHeartbeat > 2000 * this._heartbeatInterval) {
 			console.log("SOCKET | closing after heartbeat timed out");
 			this._socket.close(1008, "Heartbeat timeout");