1 files changed, 8 insertions, 0 deletions
diff --git a/runtime/web_worker.rs b/runtime/web_worker.rs
index 68bbe1a5d..8c8761d62 100644
--- a/runtime/web_worker.rs
+++ b/runtime/web_worker.rs
@@ -67,6 +67,14 @@ impl WebWorkerHandle {
   /// Post message to worker as a host.
   pub fn post_message(&self, buf: Box<[u8]>) -> Result<(), AnyError> {
     let mut sender = self.sender.clone();
+    // If the channel is closed,
+    // the worker must have terminated but the termination message has not yet been recieved.
+    //
+    // Therefore just treat it as if the worker has terminated and return.
+    if sender.is_closed() {
+      self.terminated.store(true, Ordering::SeqCst);
+      return Ok(());
+    }
     sender.try_send(buf)?;
     Ok(())
   }