From 1b81ffaaafe6238f12920c9d1327c3f129f52846 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Thu, 20 Apr 2017 22:31:18 +0200
Subject: [PATCH] fix crash ExpressionDelegate::paint

---
 src/Mod/Sketcher/Gui/TaskSketcherConstrains.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Mod/Sketcher/Gui/TaskSketcherConstrains.cpp b/src/Mod/Sketcher/Gui/TaskSketcherConstrains.cpp
index e8c187e684..2a6a9e2d3e 100644
--- a/src/Mod/Sketcher/Gui/TaskSketcherConstrains.cpp
+++ b/src/Mod/Sketcher/Gui/TaskSketcherConstrains.cpp
@@ -331,7 +331,7 @@ protected:
         options.widget->style()->drawControl(QStyle::CE_ItemViewItem, &options, painter);
 
         ConstraintItem * item = dynamic_cast<ConstraintItem*>(view->item(index.row()));
-        if (!item)
+        if (!item || item->sketch->Constraints.getSize() < item->ConstraintNbr)
             return;
 
         App::ObjectIdentifier path = item->sketch->Constraints.createPath(item->ConstraintNbr);