From 2035e0cfbc420665a2875d2cf05184a85b326253 Mon Sep 17 00:00:00 2001
From: Eric Trombly <etrombly@yahoo.com>
Date: Thu, 25 Jun 2020 06:57:50 -0500
Subject: [PATCH] fix null reference

---
 src/Mod/Path/Gui/ViewProviderPath.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/Mod/Path/Gui/ViewProviderPath.cpp b/src/Mod/Path/Gui/ViewProviderPath.cpp
index 2a9fe11752ec..3ac3416d640e 100644
--- a/src/Mod/Path/Gui/ViewProviderPath.cpp
+++ b/src/Mod/Path/Gui/ViewProviderPath.cpp
@@ -120,10 +120,10 @@ class PathSelectionObserver: public Gui::SelectionObserver {
             mat *= linkMat;
             mat.inverse();
             Base::Vector3d pt = mat*Base::Vector3d(msg.x,msg.y,msg.z);
-            const SbVec3f &ptTo = *vp->pcLineCoords->point.getValues(vp->pt0Index);
+            auto ptTo = vp->pcLineCoords->point.getValues(vp->pt0Index);
             SbVec3f ptFrom(pt.x,pt.y,pt.z);
-            if(ptFrom != ptTo) {
-                vp->pcArrowTransform->pointAt(ptFrom,ptTo);
+            if(ptTo && ptFrom != *ptTo) {
+                vp->pcArrowTransform->pointAt(ptFrom,*ptTo);
                 setArrow(vp->pcArrowSwitch);
                 return;
             }