From 8aecb00a8d0595a99d1f18b48da5b2feabc71a0a Mon Sep 17 00:00:00 2001
From: Danny Lepage <danny.lepage@gmail.com>
Date: Tue, 23 Jun 2015 19:58:29 -0400
Subject: [PATCH] Fix Debug Assert  in
 CmdPartDesignDuplicateSelection::activated

Under Windows, "Edit/Duplicate selected object" raised a
Debug Assertion Failed "Expression: sequence not ordered".
---
 src/Mod/PartDesign/Gui/Command.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Mod/PartDesign/Gui/Command.cpp b/src/Mod/PartDesign/Gui/Command.cpp
index e089bd5d2..377895e59 100644
--- a/src/Mod/PartDesign/Gui/Command.cpp
+++ b/src/Mod/PartDesign/Gui/Command.cpp
@@ -294,6 +294,8 @@ void CmdPartDesignDuplicateSelection::activated(int iMsg)
     // Find the features that were added
     std::vector<App::DocumentObject*> afterFeatures = getDocument()->getObjects();
     std::vector<App::DocumentObject*> newFeatures;
+    std::sort(beforeFeatures.begin(), beforeFeatures.end());
+    std::sort(afterFeatures.begin(), afterFeatures.end());
     std::set_difference(afterFeatures.begin(), afterFeatures.end(), beforeFeatures.begin(), beforeFeatures.end(),
                         std::back_inserter(newFeatures));