From 565a0994b3c863dbaaf0dffd9bd65f968211e4b1 Mon Sep 17 00:00:00 2001
From: dwarning <dwarning>
Date: Sun, 23 Feb 2020 20:39:44 +0100
Subject: [PATCH] free errMsg only if available

---
 src/spicelib/devices/cktask.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/spicelib/devices/cktask.c b/src/spicelib/devices/cktask.c
index 884d6570f..9c9f9a453 100644
--- a/src/spicelib/devices/cktask.c
+++ b/src/spicelib/devices/cktask.c
@@ -35,6 +35,7 @@ CKTask(CKTcircuit *ckt, GENinstance *instance, int which, IFvalue *value, IFvalu
     if (error && ft_ngdebug) {
         printf("\nWarning: %s\n", errMsg);
     }
-    FREE(errMsg);
+    if (errMsg)
+        FREE(errMsg);
     return(error);
 }