From 780ccbfb3c90459d413ff1de24179a5a6faa63b6 Mon Sep 17 00:00:00 2001
From: h_vogt <h_vogt>
Date: Wed, 11 Dec 2013 16:32:08 +0100
Subject: [PATCH] prevent crash, if due to input bug ckt is not created,
 reported by  Andrian

---
 src/frontend/inp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/frontend/inp.c b/src/frontend/inp.c
index 9bce66e43..9cf009761 100644
--- a/src/frontend/inp.c
+++ b/src/frontend/inp.c
@@ -852,7 +852,8 @@ inp_dodeck(
     }
 
     /* set ckt->CKTisLinear=1 if circuit only contains R, L, C */
-    cktislinear(ckt, deck);
+    if (ckt)
+        cktislinear(ckt, deck);
     /* set some output terminal data */
     out_init();