From 7beac9db5bc472e75754c3508e4b8b3dec50b70c Mon Sep 17 00:00:00 2001
From: Roman Telezhynskyi <dismine@gmail.com>
Date: Sun, 22 Nov 2020 09:32:33 +0200
Subject: [PATCH] Fix Tape crash on opening. Closes #81

---
 ChangeLog.txt                |  1 +
 src/app/tape/tmainwindow.cpp | 12 ++++++++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/ChangeLog.txt b/ChangeLog.txt
index 46757c1fe..b864e7f40 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -1,6 +1,7 @@
 # Version 0.7.40 (unreleased)
 - New function Warning.
 - [smart-pattern/valentina#80] Allow insertion of multiple nodes.
+- [smart-pattern/valentina#81] Tape crash on opening.
 
 # Version 0.7.39 Nov 17, 2020
 - Fix crash for Line tool notes.
diff --git a/src/app/tape/tmainwindow.cpp b/src/app/tape/tmainwindow.cpp
index e02bdfe23..2733fb09b 100644
--- a/src/app/tape/tmainwindow.cpp
+++ b/src/app/tape/tmainwindow.cpp
@@ -635,9 +635,12 @@ void TMainWindow::changeEvent(QEvent *event)
         }
 
         {
-            labelPatternUnit->setText(tr("Pattern unit:"));
+            if (labelPatternUnit)
+            {
+                labelPatternUnit->setText(tr("Pattern unit:"));
+            }
 
-            if (comboBoxUnits != nullptr)
+            if (comboBoxUnits)
             {
                 const qint32 index = comboBoxUnits->currentIndex();
                 comboBoxUnits->blockSignals(true);
@@ -4302,6 +4305,11 @@ void TMainWindow::InitComboBoxUnits()
 //---------------------------------------------------------------------------------------------------------------------
 void TMainWindow::InitMeasurementUnits()
 {
+    if (not m)
+    {
+        return;
+    }
+
     ui->comboBoxMUnits->blockSignals(true);
 
     int current = -1;