From 34fcdda1e2567b7c0b31748ef377a3c9d5dd5291 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sun, 19 Aug 2018 21:03:15 +0200
Subject: [PATCH] plug a potentially huge memory leak

---
 src/spicelib/devices/vsrc/vsrcdel.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/spicelib/devices/vsrc/vsrcdel.c b/src/spicelib/devices/vsrc/vsrcdel.c
index c86a80d08..f6f658f68 100644
--- a/src/spicelib/devices/vsrc/vsrcdel.c
+++ b/src/spicelib/devices/vsrc/vsrcdel.c
@@ -7,6 +7,7 @@ Author: 1985 Thomas L. Quarles
 #include "vsrcdefs.h"
 #include "ngspice/sperror.h"
 #include "ngspice/suffix.h"
+#include "ngspice/1-f-code.h"
 
 
 int
@@ -15,8 +16,10 @@ VSRCdelete(GENinstance *gen_inst)
     VSRCinstance *inst = (VSRCinstance *) gen_inst;
 
     FREE(inst->VSRCcoeffs);
-
-    FREE(inst->VSRCtrnoise_state);
+    if (inst->VSRCtrnoise_state) {
+        FREE(inst->VSRCtrnoise_state->oneof);
+        FREE(inst->VSRCtrnoise_state);
+    }
     FREE(inst->VSRCtrrandom_state);
 
     return OK;