From 03ce0f276e768428f0ffdac6a7d219d25834afb0 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Thu, 15 Mar 2018 11:13:45 +0100
Subject: [PATCH] fixes #0003376: PartDesign Boolean produces exception with
 wrong selection of active Body

---
 src/Mod/PartDesign/Gui/Command.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/Mod/PartDesign/Gui/Command.cpp b/src/Mod/PartDesign/Gui/Command.cpp
index 63c4e678fe..3492bcf408 100644
--- a/src/Mod/PartDesign/Gui/Command.cpp
+++ b/src/Mod/PartDesign/Gui/Command.cpp
@@ -2185,7 +2185,7 @@ void CmdPartDesignBoolean::activated(int iMsg)
     openCommand("Create Boolean");
     std::string FeatName = getUniqueObjectName("Boolean");
     doCommand(Doc,"App.activeDocument().%s.newObject('PartDesign::Boolean','%s')", pcActiveBody->getNameInDocument(), FeatName.c_str());
-    
+
     if (BodyFilter.match() && !BodyFilter.Result.empty()) {
         std::vector<App::DocumentObject*> bodies;
         std::vector<std::vector<Gui::SelectionObject> >::iterator i = BodyFilter.Result.begin();
@@ -2195,8 +2195,11 @@ void CmdPartDesignBoolean::activated(int iMsg)
                     bodies.push_back(j->getObject());
             }
         }
-        std::string bodyString = PartDesignGui::buildLinkListPythonStr(bodies);
-        doCommand(Doc,"App.activeDocument().%s.addObjects(%s)",FeatName.c_str(),bodyString.c_str());
+
+        if (!bodies.empty()) {
+            std::string bodyString = PartDesignGui::buildLinkListPythonStr(bodies);
+            doCommand(Doc,"App.activeDocument().%s.addObjects(%s)",FeatName.c_str(),bodyString.c_str());
+        }
     }
 
     finishFeature(this, FeatName, nullptr, false);