prevent fail when scale is zero

2016-07-03 20:23:08 -04:00
parent 30f56fabf3
commit 5b5243eae5
1 changed files with 5 additions and 1 deletions
--- a/src/Mod/TechDraw/App/DrawViewPart.cpp
+++ b/src/Mod/TechDraw/App/DrawViewPart.cpp
@@ -367,10 +367,14 @@ void DrawViewPart::extractFaces()
    }

    std::vector<TopoDS_Wire> sortedWires = sortWiresBySize(fw,false);
+    if (!sortedWires.size()) {
+        Base::Console().Log("INFO - DVP::extractFaces - no sorted Wires!\n");
+        return;                                     // might happen in the middle of changes?
+    }

    //remove the largest wire (OuterWire of graph)
    Bnd_Box bigBox;
-    if (!(sortedWires.back().IsNull())) {
+    if (sortedWires.size() && !sortedWires.front().IsNull()) {
        BRepBndLib::Add(sortedWires.front(), bigBox);
        bigBox.SetGap(0.0);
    }