From 91a9c0cf722a9a536b58a0a5afd7af7aa8298943 Mon Sep 17 00:00:00 2001
From: Will Hedgecock <will.hedgecock@gmail.com>
Date: Tue, 18 Jan 2022 13:25:17 -0600
Subject: [PATCH] Ensure port handle is valid before reconfiguring timeouts

---
 src/main/java/com/fazecast/jSerialComm/SerialPort.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/fazecast/jSerialComm/SerialPort.java b/src/main/java/com/fazecast/jSerialComm/SerialPort.java
index c5ee398..2fa1fab 100644
--- a/src/main/java/com/fazecast/jSerialComm/SerialPort.java
+++ b/src/main/java/com/fazecast/jSerialComm/SerialPort.java
@@ -1017,7 +1017,8 @@ public final class SerialPort
 		{
 			serialEventListener.stopListening();
 			serialEventListener = null;
-			configTimeouts(portHandle, timeoutMode, readTimeout, writeTimeout, eventFlags);
+			if (portHandle != 0)
+				configTimeouts(portHandle, timeoutMode, readTimeout, writeTimeout, eventFlags);
 		}
 		userDataListener = null;
 	}