From e51954529a7572a5bb6ac698afc30088d439e2aa Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Tue, 27 Jun 2023 07:39:27 -0700
Subject: [PATCH] ioc: avoid *NULL on exit when partially initialized

---
 ioc/group.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/ioc/group.cpp b/ioc/group.cpp
index 9321f7e..1c444b2 100644
--- a/ioc/group.cpp
+++ b/ioc/group.cpp
@@ -43,9 +43,11 @@ IOCGroupConfig& IOCGroupConfig::instance()
 
 void IOCGroupConfigCleanup()
 {
-    epicsGuard<epicsMutex> G(configInstance->groupMapMutex);
-    configInstance->groupMap.clear();
-    configInstance->groupConfigFiles.clear();
+    if(configInstance) {
+        epicsGuard<epicsMutex> G(configInstance->groupMapMutex);
+        configInstance->groupMap.clear();
+        configInstance->groupConfigFiles.clear();
+    }
 }
 
 /**