From d611611055695f75a39527989224d3fb1cc51a48 Mon Sep 17 00:00:00 2001
From: wandererfan <wandererfan@gmail.com>
Date: Wed, 17 Apr 2024 10:09:10 -0400
Subject: [PATCH] [TD]fix crash on corrupt reference

---
 src/Mod/TechDraw/App/DimensionReferences.cpp | 10 ++++++-
 src/Mod/TechDraw/App/DrawUtil.cpp            |  3 +-
 src/Mod/TechDraw/App/DrawViewPart.cpp        | 31 +++++++-------------
 3 files changed, 21 insertions(+), 23 deletions(-)

diff --git a/src/Mod/TechDraw/App/DimensionReferences.cpp b/src/Mod/TechDraw/App/DimensionReferences.cpp
index 9f82c903be7a..0cc62c842381 100644
--- a/src/Mod/TechDraw/App/DimensionReferences.cpp
+++ b/src/Mod/TechDraw/App/DimensionReferences.cpp
@@ -106,14 +106,23 @@ TopoDS_Shape ReferenceEntry::getGeometry() const
                 // getVertex throws on not found, but we want to return null
                 // shape
                 auto vgeom = dvp->getVertex(getSubName());
+                if (!vgeom) {
+                    return {};
+                }
                 return vgeom->getOCCVertex();
             }
             if (gType == "Edge") {
                 auto egeom = dvp->getEdge(getSubName());
+                if (!egeom) {
+                    return {};
+                }
                 return egeom->getOCCEdge();
             }
             if (gType == "Face") {
                 auto fgeom = dvp->getFace(getSubName());
+                if (!fgeom) {
+                    return {};
+                }
                 return fgeom->toOccFace();
             }
         }
@@ -123,7 +132,6 @@ TopoDS_Shape ReferenceEntry::getGeometry() const
         }
     }
 
-    // Base::Console().Message("RE::getGeometry - getting 2d geometry\n");
     Part::TopoShape shape = Part::Feature::getTopoShape(getObject());
     auto geoFeat = dynamic_cast<App::GeoFeature*>(getObject());
     if (geoFeat) {
diff --git a/src/Mod/TechDraw/App/DrawUtil.cpp b/src/Mod/TechDraw/App/DrawUtil.cpp
index 0a35130312c1..b28bb8cd673c 100644
--- a/src/Mod/TechDraw/App/DrawUtil.cpp
+++ b/src/Mod/TechDraw/App/DrawUtil.cpp
@@ -1836,7 +1836,8 @@ std::string DrawUtil::translateArbitrary(std::string context, std::string baseNa
 bool DrawUtil::isCosmeticVertex(App::DocumentObject* owner, std::string element)
 {
     auto ownerView = static_cast<TechDraw::DrawViewPart*>(owner);
-    auto vertex = ownerView->getVertex(element);
+    auto vertexIndex = DrawUtil::getIndexFromName(element);
+    auto vertex = ownerView->getProjVertexByIndex(vertexIndex);
     if (vertex) {
         return vertex->getCosmetic();
     }
diff --git a/src/Mod/TechDraw/App/DrawViewPart.cpp b/src/Mod/TechDraw/App/DrawViewPart.cpp
index 14cc5ecc87dd..f2876419bb19 100644
--- a/src/Mod/TechDraw/App/DrawViewPart.cpp
+++ b/src/Mod/TechDraw/App/DrawViewPart.cpp
@@ -774,18 +774,10 @@ const std::vector<TechDraw::VertexPtr> DrawViewPart::getVertexGeometry() const
 //! TechDraw vertex names run from 0 to n-1
 TechDraw::VertexPtr DrawViewPart::getVertex(std::string vertexName) const
 {
-    const std::vector<TechDraw::VertexPtr> allVertex(DrawViewPart::getVertexGeometry());
-    size_t iTarget = DrawUtil::getIndexFromName(vertexName);
-    if (allVertex.empty()) {
-        //should not happen
-        throw Base::IndexError("DVP::getVertex - No vertices found.");
-    }
-    if (iTarget >= allVertex.size()) {
-        //should not happen
-        throw Base::IndexError("DVP::getVertex - Vertex not found.");
-    }
-
-    return allVertex.at(iTarget);
+    // Base::Console().Message("DVP::getVertex(%s)\n", vertexName.c_str());
+    auto vertexIndex = DrawUtil::getIndexFromName(vertexName);
+    auto vertex = getProjVertexByIndex(vertexIndex);
+    return vertex;
 }
 
 //! returns existing BaseGeom of 2D Edge
@@ -795,11 +787,11 @@ TechDraw::BaseGeomPtr DrawViewPart::getEdge(std::string edgeName) const
     const std::vector<TechDraw::BaseGeomPtr>& geoms = getEdgeGeometry();
     if (geoms.empty()) {
         //should not happen
-        throw Base::IndexError("DVP::getEdge - No edges found.");
+        return nullptr;
     }
     size_t iEdge = DrawUtil::getIndexFromName(edgeName);
     if ((unsigned)iEdge >= geoms.size()) {
-        throw Base::IndexError("DVP::getEdge - Edge not found.");
+        return nullptr;
     }
     return geoms.at(iEdge);
 }
@@ -812,11 +804,11 @@ TechDraw::FacePtr DrawViewPart::getFace(std::string faceName) const
     const std::vector<TechDraw::FacePtr>& faces = getFaceGeometry();
     if (faces.empty()) {
         //should not happen
-        throw Base::IndexError("DVP::getFace - No faces found.");
+        return nullptr;
     }
     size_t iFace = DrawUtil::getIndexFromName(faceName);
     if (iFace >= faces.size()) {
-        throw Base::IndexError("DVP::getFace - Face not found.");
+        return nullptr;
     }
     return faces.at(iFace);
 }
@@ -846,9 +838,7 @@ TechDraw::BaseGeomPtr DrawViewPart::getGeomByIndex(int idx) const
     if (geoms.empty()) {
         return nullptr;
     }
-    if ((unsigned)idx >= geoms.size()) {
-        Base::Console().Error("DVP::getGeomByIndex(%d) - invalid index - size: %d\n", idx,
-                              geoms.size());
+    if (idx >= (int)geoms.size()) {
         return nullptr;
     }
     return geoms.at(idx);
@@ -859,10 +849,9 @@ TechDraw::VertexPtr DrawViewPart::getProjVertexByIndex(int idx) const
 {
     const std::vector<TechDraw::VertexPtr>& geoms = getVertexGeometry();
     if (geoms.empty()) {
-        return nullptr;
+       return nullptr;
     }
     if ((unsigned)idx >= geoms.size()) {
-        Base::Console().Error("DVP::getProjVertexByIndex(%d) - invalid index - size: %d\n", idx);
         return nullptr;
     }
     return geoms.at(idx);