From 8ccbff951b7e7f4262ac28398f839a0722716187 Mon Sep 17 00:00:00 2001
From: blobfish <blobfish@gmx.com>
Date: Sun, 11 Dec 2016 16:20:16 -0500
Subject: [PATCH] Gui: DAGView: adding check for App::DocumentObject

---
 src/Gui/DAGView/DAGModel.cpp      | 2 ++
 src/Gui/DAGView/DAGModelGraph.cpp | 8 ++++++++
 src/Gui/DAGView/DAGModelGraph.h   | 1 +
 3 files changed, 11 insertions(+)

diff --git a/src/Gui/DAGView/DAGModel.cpp b/src/Gui/DAGView/DAGModel.cpp
index 140caf8d4..a1fbe6eee 100644
--- a/src/Gui/DAGView/DAGModel.cpp
+++ b/src/Gui/DAGView/DAGModel.cpp
@@ -479,6 +479,8 @@ void Model::updateSlot()
     std::vector<App::DocumentObject *> otherDObjects = currentDObject->getOutList();
     for (auto &currentOtherDObject : otherDObjects)
     {
+      if (!hasRecord(currentOtherDObject, *graphLink))
+          continue;
       Vertex otherVertex = findRecord(currentOtherDObject, *graphLink).vertex;
       bool result;
       Edge edge;
diff --git a/src/Gui/DAGView/DAGModelGraph.cpp b/src/Gui/DAGView/DAGModelGraph.cpp
index b31f14f06..c74d3c332 100644
--- a/src/Gui/DAGView/DAGModelGraph.cpp
+++ b/src/Gui/DAGView/DAGModelGraph.cpp
@@ -57,6 +57,14 @@ EdgeProperty::EdgeProperty() : relation(BranchTag::None)
 
 }
 
+bool Gui::DAG::hasRecord(const App::DocumentObject* dObjectIn, const GraphLinkContainer &containerIn)
+{
+  typedef GraphLinkContainer::index<GraphLinkRecord::ByDObject>::type List;
+  const List &list = containerIn.get<GraphLinkRecord::ByDObject>();
+  List::const_iterator it = list.find(dObjectIn);
+  return it != list.end();
+}
+
 const GraphLinkRecord& Gui::DAG::findRecord(Vertex vertexIn, const GraphLinkContainer &containerIn)
 {
   typedef GraphLinkContainer::index<GraphLinkRecord::ByVertex>::type List;
diff --git a/src/Gui/DAGView/DAGModelGraph.h b/src/Gui/DAGView/DAGModelGraph.h
index ec71177a4..e6af0a067 100644
--- a/src/Gui/DAGView/DAGModelGraph.h
+++ b/src/Gui/DAGView/DAGModelGraph.h
@@ -280,6 +280,7 @@ namespace Gui
       >
     > GraphLinkContainer;
     
+    bool hasRecord(const App::DocumentObject* dObjectIn, const GraphLinkContainer &containerIn);
     const GraphLinkRecord& findRecord(Vertex vertexIn, const GraphLinkContainer &containerIn);
     const GraphLinkRecord& findRecord(const App::DocumentObject* dObjectIn, const GraphLinkContainer &containerIn);
     const GraphLinkRecord& findRecord(const Gui::ViewProviderDocumentObject* VPDObjectIn, const GraphLinkContainer &containerIn);