From cc806cdf2121878ae4c10b1fd0c4c03b14ba33c7 Mon Sep 17 00:00:00 2001
From: Leo Kettmeir <crowlkats@toaxl.com>
Date: Thu, 12 Jan 2023 13:43:36 +0100
Subject: fix: check if BroadcastChannel is open before sending (#17366)

Fixes #16978
---
 ext/broadcast_channel/01_broadcast_channel.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'ext')

diff --git a/ext/broadcast_channel/01_broadcast_channel.js b/ext/broadcast_channel/01_broadcast_channel.js
index cf3b17ac5..59c6b7cef 100644
--- a/ext/broadcast_channel/01_broadcast_channel.js
+++ b/ext/broadcast_channel/01_broadcast_channel.js
@@ -122,7 +122,11 @@
       dispatch(this, this[_name], new Uint8Array(data));
 
       // Send to listeners in other VMs.
-      defer(() => core.opAsync("op_broadcast_send", rid, this[_name], data));
+      defer(() => {
+        if (!this[_closed]) {
+          core.opAsync("op_broadcast_send", rid, this[_name], data);
+        }
+      });
     }
 
     close() {
-- 
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