From e85ce57b82560c9dfe49d4926a8c5e3ed410b338 Mon Sep 17 00:00:00 2001
From: Fabian Posch <fabian@posch.tech>
Date: Tue, 9 Jan 2024 20:40:26 -0500
Subject: [PATCH] fix worker checks if thread object exists before attempting
 join

---
 src/actsim_agent/worker.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/actsim_agent/worker.cpp b/src/actsim_agent/worker.cpp
index 98eb934..012ae03 100644
--- a/src/actsim_agent/worker.cpp
+++ b/src/actsim_agent/worker.cpp
@@ -39,7 +39,8 @@ void Worker::cancel_current() {
 }
 
 void Worker::join() {
-    worker_thread->join();
+    if (this->worker_thread != nullptr) return;
+    this->worker_thread->join();
 }
 
 void Worker::thread_run() {