From d06f39f67d6e52ab741c00e6e230ce0ebb27444c Mon Sep 17 00:00:00 2001
From: h_vogt <h_vogt>
Date: Tue, 11 Apr 2017 19:18:15 +0200
Subject: [PATCH] device.c, bug #342, prevent crash when using 'alter'

#342 SegFault alter command
https://sourceforge.net/p/ngspice/bugs/342/
---
 src/frontend/device.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/frontend/device.c b/src/frontend/device.c
index cbb7b0cc8..0e90f7ac9 100644
--- a/src/frontend/device.c
+++ b/src/frontend/device.c
@@ -1164,6 +1164,7 @@ com_alter_common(wordlist *wl, int do_model)
                 wl = wl->wl_next;
                 step = -1;
                 wl2 = wlin;
+                wl = NULL;
             } else if (strlen(argument) > 1) {
                 wl2 = wl_cons(copy_substring(argument, eqptr),
                               wl_cons(copy("="),