From e219e5555af7b05e541b7e290d176495f9456329 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Wed, 11 Oct 2017 13:51:38 +0200
Subject: [PATCH] in mult-common feature check if input shapes are valid

---
 src/Mod/Part/App/FeaturePartCommon.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Mod/Part/App/FeaturePartCommon.cpp b/src/Mod/Part/App/FeaturePartCommon.cpp
index 78a9d8e8f2..51543a2102 100644
--- a/src/Mod/Part/App/FeaturePartCommon.cpp
+++ b/src/Mod/Part/App/FeaturePartCommon.cpp
@@ -108,7 +108,13 @@ App::DocumentObjectExecReturn *MultiCommon::execute(void)
         try {
             std::vector<ShapeHistory> history;
             TopoDS_Shape resShape = s.front();
+            if (resShape.IsNull())
+                throw Base::RuntimeError("Input shape is null");
+
             for (std::vector<TopoDS_Shape>::iterator it = s.begin()+1; it != s.end(); ++it) {
+                if (it->IsNull())
+                    throw Base::RuntimeError("Input shape is null");
+
                 // Let's call algorithm computing a fuse operation:
                 BRepAlgoAPI_Common mkCommon(resShape, *it);
                 // Let's check if the fusion has been successful