From 0b92a15ae8ab844489e2f8bca59422a9f06b227e Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sat, 13 Jul 2019 17:43:57 +0200
Subject: [PATCH] safeguard against vectors with 0 length

---
 src/sharedspice.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sharedspice.c b/src/sharedspice.c
index 6b7099b69..8cb6e72fa 100644
--- a/src/sharedspice.c
+++ b/src/sharedspice.c
@@ -1860,6 +1860,9 @@ int sh_ExecutePerLoop(void)
 
     /* get the data of the last entry to the plot vector */
     veclen = pl->pl_dvecs->v_length - 1;
+    /* safeguard against vectors with 0 length (e.g. @c1[i] during ac simulation) */
+    if (veclen < 1)
+        return 2;
     curvecvalsall->vecindex = veclen;
     for (d = pl->pl_dvecs, i = 0; d; d = d->v_next, i++) {
         /* test if real */