From 36fe5994b97a41c75e583241072ace1e8cfc9443 Mon Sep 17 00:00:00 2001
From: DeepSOIC <vv.titov@gmail.com>
Date: Wed, 24 Jun 2015 14:45:21 +0300
Subject: [PATCH] Revolution: fix crash when selecting stuff during task

---
 src/Mod/PartDesign/App/FeatureSketchBased.cpp | 2 +-
 src/Mod/PartDesign/Gui/ReferenceSelection.cpp | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Mod/PartDesign/App/FeatureSketchBased.cpp b/src/Mod/PartDesign/App/FeatureSketchBased.cpp
index de240c674..5256fa278 100644
--- a/src/Mod/PartDesign/App/FeatureSketchBased.cpp
+++ b/src/Mod/PartDesign/App/FeatureSketchBased.cpp
@@ -1060,7 +1060,7 @@ void SketchBased::getAxis(const App::DocumentObject *pcReferenceAxis, const std:
              throw Base::Exception("Rotation axis must not be perpendicular with the sketch plane");
     }
     else if (pcReferenceAxis->getTypeId().isDerivedFrom(PartDesign::Feature::getClassTypeId())) {
-        if (subReferenceAxis[0].empty())
+        if (subReferenceAxis.empty())
             throw Base::Exception("No rotation axis reference specified");
         const Part::Feature* refFeature = static_cast<const Part::Feature*>(pcReferenceAxis);
         Part::TopoShape refShape = refFeature->Shape.getShape();
diff --git a/src/Mod/PartDesign/Gui/ReferenceSelection.cpp b/src/Mod/PartDesign/Gui/ReferenceSelection.cpp
index 2092b3def..dc10fbf0f 100644
--- a/src/Mod/PartDesign/Gui/ReferenceSelection.cpp
+++ b/src/Mod/PartDesign/Gui/ReferenceSelection.cpp
@@ -156,9 +156,11 @@ const QString getRefStr(const App::DocumentObject* obj, const std::vector<std::s
 
     if (PartDesign::Feature::isDatum(obj))
         return QString::fromAscii(obj->getNameInDocument());
-    else
+    else if (sub.size()>0)
         return QString::fromAscii(obj->getNameInDocument()) + QString::fromAscii(":") +
                QString::fromAscii(sub.front().c_str());
+    else
+        return QString();
 }
 
 const std::string getPythonStr(const App::DocumentObject* obj, const std::vector<std::string>& sub)