From 0d6925fe2aa88f8b1bd8c0c343b6f52f4db95f1a Mon Sep 17 00:00:00 2001
From: blobfish <blobfish@gmx.com>
Date: Tue, 5 May 2015 10:29:31 -0400
Subject: [PATCH] Gui: Part: Viewprovider: check sub objects for valid view
 provider

---
 src/Gui/ViewProviderPart.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Gui/ViewProviderPart.cpp b/src/Gui/ViewProviderPart.cpp
index fece783627..8d87a69f90 100644
--- a/src/Gui/ViewProviderPart.cpp
+++ b/src/Gui/ViewProviderPart.cpp
@@ -106,7 +106,11 @@ void ViewProviderPart::onObjectChanged(const App::DocumentObject& obj, const App
             if(obj->getTypeId() != App::Origin::getClassTypeId() &&
                obj->getTypeId() != App::Plane::getClassTypeId() && 
                obj->getTypeId() != App::Line::getClassTypeId() ) {
-                bboxAction.apply(Gui::Application::Instance->getViewProvider(obj)->getRoot());
+                //getting crash on deletion PartDesign::Body object. no viewprovider.
+                ViewProvider *viewProvider = Gui::Application::Instance->getViewProvider(obj);
+                if (!viewProvider)
+                  continue;
+                bboxAction.apply(viewProvider->getRoot());
                 bbox.extendBy(bboxAction.getBoundingBox());
             }
         };