From 720f29851a3464d89d1cfd3c0991194540aa445b Mon Sep 17 00:00:00 2001
From: dwarning <dwarning>
Date: Sun, 1 May 2022 17:55:56 +0200
Subject: [PATCH] prevent crash for absurd parameter input

---
 src/spicelib/devices/dio/diosetup.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/spicelib/devices/dio/diosetup.c b/src/spicelib/devices/dio/diosetup.c
index 70873b16d..c43f5b0c5 100644
--- a/src/spicelib/devices/dio/diosetup.c
+++ b/src/spicelib/devices/dio/diosetup.c
@@ -90,10 +90,18 @@ DIOsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *states)
             model->DIOgradingSWCoeff = .33;
         }
         if(!model->DIOforwardKneeCurrentGiven) {
-            model->DIOforwardKneeCurrent = 0.0;
+            model->DIOforwardKneeCurrent = 1.0;
+        } else {
+            if (model->DIOforwardKneeCurrent < ckt->CKTepsmin) {
+                model->DIOforwardKneeCurrentGiven = FALSE;
+            }
         }
         if(!model->DIOreverseKneeCurrentGiven) {
-            model->DIOreverseKneeCurrent = 0.0;
+            model->DIOreverseKneeCurrent = 1.0;
+        } else {
+            if (model->DIOreverseKneeCurrent < ckt->CKTepsmin) {
+                model->DIOreverseKneeCurrentGiven = FALSE;
+            }
         }
         if(!model->DIObrkdEmissionCoeffGiven) {
             model->DIObrkdEmissionCoeff = model->DIOemissionCoeff;