From 625b3d14fc7fb1179e64c1bfb951b0dda9365b18 Mon Sep 17 00:00:00 2001
From: h_vogt <h_vogt>
Date: Sun, 21 Mar 2010 21:23:47 +0000
Subject: [PATCH] no crash after 'unset undefined'

---
 ChangeLog               | 4 ++++
 src/frontend/variable.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index bf909c745..0f7c6684a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2010-03-20 Holger Vogt
+ * variable.c:450 prevent ngspice from crashing after command 'unset zzz', 
+   when zzz is not defined
+
 2010-03-20 Holger Vogt
  * com_compose.c: comment corrected
  * subckt.c, cktdefs.h, acan.c, ifeval.c, inp2b.c, inpptree.c, cktinit.c:
diff --git a/src/frontend/variable.c b/src/frontend/variable.c
index 83e3d14a0..c7728b16a 100644
--- a/src/frontend/variable.c
+++ b/src/frontend/variable.c
@@ -447,7 +447,7 @@ cp_remvar(char *varname)
         /* Gotta make up a var struct for cp_usrset()... */
         v = alloc(struct variable);
 	ZERO(v, struct variable);
-        v->va_name = varname;
+        v->va_name = copy(varname);
         v->va_type = VT_NUM;
         v->va_bool = 0;
         found = FALSE;