From 331c7ad59dcd2ea84af59e30988062ff4641bd1f Mon Sep 17 00:00:00 2001
From: Bas Ruigrok <Rexbas@proton.me>
Date: Thu, 19 Sep 2024 20:31:36 +0200
Subject: [PATCH] Gui: Fix segfault in align to selection tool

---
 src/Gui/View3DInventorViewer.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index 5e8c5412c2..defc635fcf 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -3380,7 +3380,8 @@ void View3DInventorViewer::alignToSelection()
 
     const auto globalPlacement = App::GeoFeature::getGlobalPlacement(selection[0].pResolvedObject, selection[0].pObject, elementName.oldName);
     const auto rotation = globalPlacement.getRotation() * geoFeature->Placement.getValue().getRotation().inverse();
-    const auto geoFeatureSubName = Base::Tools::splitSubName(elementName.oldName).back();
+    const auto splitSubName = Base::Tools::splitSubName(elementName.oldName);
+    const auto geoFeatureSubName = !splitSubName.empty() ? splitSubName.back() : "";
 
     Base::Vector3d direction;
     if (geoFeature->getCameraAlignmentDirection(direction, geoFeatureSubName.c_str())) {