From a7a535ade98173bb941ebdc5a0ddecdb01450aa3 Mon Sep 17 00:00:00 2001
From: Vadim Kuznetsov <ra3xdh@gmail.com>
Date: Tue, 3 Oct 2023 19:45:22 +0300
Subject: [PATCH] Fix empty log on second simulation start

---
 qucs/extsimkernels/abstractspicekernel.cpp | 2 +-
 qucs/extsimkernels/ngspice.cpp             | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/qucs/extsimkernels/abstractspicekernel.cpp b/qucs/extsimkernels/abstractspicekernel.cpp
index d17895ee..ee2fca69 100644
--- a/qucs/extsimkernels/abstractspicekernel.cpp
+++ b/qucs/extsimkernels/abstractspicekernel.cpp
@@ -48,6 +48,7 @@ AbstractSpiceKernel::AbstractSpiceKernel(Schematic *sch_, QObject *parent) :
     QObject(parent)
 {
     Sch = sch_;
+    console = nullptr;
 
     if (Sch->showBias == 0) DC_OP_only = true;
     else DC_OP_only = false;
@@ -351,7 +352,6 @@ void AbstractSpiceKernel::parseNgSpiceSimOutput(QString ngspice_file,QList< QLis
     int NumPoints = 0;
     int bin_offset = 0;
     QByteArray content;
-    console = nullptr;
 
     QFile ofile(ngspice_file);
     if (ofile.open(QFile::ReadOnly)) {
diff --git a/qucs/extsimkernels/ngspice.cpp b/qucs/extsimkernels/ngspice.cpp
index 7c4dacdb..22b6d9df 100644
--- a/qucs/extsimkernels/ngspice.cpp
+++ b/qucs/extsimkernels/ngspice.cpp
@@ -495,7 +495,8 @@ void Ngspice::slotSimulate()
     }
 
     if (checker_error) {
-        console->insertPlainText(output);
+        if (console != nullptr)
+            console->insertPlainText(output);
         emit finished();
         emit errors(QProcess::FailedToStart);
         return;