From 52efc0372c7e39a42ab1d3599e0cdde79172d8c0 Mon Sep 17 00:00:00 2001
From: Vadim Yanitskiy <vyanitskiy@sysmocom.de>
Date: Sun, 2 May 2021 23:07:38 +0200
Subject: [PATCH] ModemATCommandLink: fix AttributeError exception in __del__()

self._sl will not be assigned if serial.Serial() fails.

Change-Id: I179a7efd92eaa3469a17b6ef252b3949c44ea6ea
---
 pySim/transport/modem_atcmd.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pySim/transport/modem_atcmd.py b/pySim/transport/modem_atcmd.py
index 43614f1a..2018ac23 100644
--- a/pySim/transport/modem_atcmd.py
+++ b/pySim/transport/modem_atcmd.py
@@ -43,7 +43,8 @@ class ModemATCommandLink(LinkBase):
 		self.reset_card()
 
 	def __del__(self):
-		self._sl.close()
+		if hasattr(self, '_sl'):
+			self._sl.close()
 
 	def send_at_cmd(self, cmd, timeout=0.2, patience=0.002):
 		# Convert from string to bytes, if needed