From a5e8dd0b6eae6660f0d10e659b2b604a4bbed65b Mon Sep 17 00:00:00 2001
From: azv <azv@opencascade.com>
Date: Thu, 5 Sep 2019 10:37:30 +0300
Subject: [PATCH] Fix crash on selection of result of empty part.

---
 src/ModuleBase/ModuleBase_WidgetSelector.cpp | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/ModuleBase/ModuleBase_WidgetSelector.cpp b/src/ModuleBase/ModuleBase_WidgetSelector.cpp
index b0c30bb74..7d701aaf5 100644
--- a/src/ModuleBase/ModuleBase_WidgetSelector.cpp
+++ b/src/ModuleBase/ModuleBase_WidgetSelector.cpp
@@ -149,11 +149,13 @@ bool ModuleBase_WidgetSelector::acceptSubShape(const GeomShapePtr& theShape,
   if (aShape.get()) {
     // Check that the selection corresponds to selection type
     TopoDS_Shape aTopoShape = aShape->impl<TopoDS_Shape>();
-    aShapeType = aTopoShape.ShapeType();
-    // for compounds check sub-shapes: it may be compound of needed type:
-    // Booleans may produce compounds of Solids
-    if (aShapeType == TopAbs_COMPOUND) {
-      aShapeType = ModuleBase_Tools::getCompoundSubType(aTopoShape);
+    if (!aTopoShape.IsNull()) {
+      aShapeType = aTopoShape.ShapeType();
+      // for compounds check sub-shapes: it may be compound of needed type:
+      // Booleans may produce compounds of Solids
+      if (aShapeType == TopAbs_COMPOUND) {
+        aShapeType = ModuleBase_Tools::getCompoundSubType(aTopoShape);
+      }
     }
   }
 
-- 
2.39.2