From 16cdefa1a8546d23efc357010e62c7c031319e56 Mon Sep 17 00:00:00 2001
From: Stefan Suhren <suhren.stefan@fh-swf.de>
Date: Sun, 31 May 2015 22:13:45 +0200
Subject: Prevent crash on reverting a selected line and then moving it

---
 interactioncanvas.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/interactioncanvas.cpp b/interactioncanvas.cpp
index 1c4e54f..28b8e74 100644
--- a/interactioncanvas.cpp
+++ b/interactioncanvas.cpp
@@ -149,6 +149,10 @@ void InteractionCanvas::keyPressEvent(QKeyEvent *keyEvent)
 
     if(!m_Lines.isEmpty() && keyEvent->key() == Qt::Key_Z && keyEvent->modifiers() == Qt::ControlModifier)
     {
+        if(m_SelectedLine == m_Lines.last())
+        {
+            m_SelectedLine = NULL;
+        }
         delete m_Lines.last();
         m_Lines.removeLast();
         update();
-- 
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