PD: Add test case to show the fix for the crash with active objects

src/Mod/PartDesign/CMakeLists.txt

@@ -34,6 +34,7 @@ set(PartDesign_OtherScripts
 
 set(PartDesign_TestScripts
     PartDesignTests/__init__.py
+    PartDesignTests/TestActiveObject.py
     PartDesignTests/TestDatum.py
     PartDesignTests/TestShapeBinder.py
     PartDesignTests/TestPad.py

src/Mod/PartDesign/PartDesignTests/TestActiveObject.py

@@ -0,0 +1,61 @@
+#***************************************************************************
+#*   Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+#*                                                                         *
+#*   This file is part of FreeCAD.                                         *
+#*                                                                         *
+#*   FreeCAD is free software: you can redistribute it and/or modify it    *
+#*   under the terms of the GNU Lesser General Public License as           *
+#*   published by the Free Software Foundation, either version 2.1 of the  *
+#*   License, or (at your option) any later version.                       *
+#*                                                                         *
+#*   FreeCAD is distributed in the hope that it will be useful, but        *
+#*   WITHOUT ANY WARRANTY; without even the implied warranty of            *
+#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
+#*   Lesser General Public License for more details.                       *
+#*                                                                         *
+#*   You should have received a copy of the GNU Lesser General Public      *
+#*   License along with FreeCAD. If not, see                               *
+#*   <https://www.gnu.org/licenses/>.                                      *
+#*                                                                         *
+#***************************************************************************
+
+import unittest
+
+import FreeCAD
+import FreeCADGui
+
+""" Test active object list """
+class TestActiveObject(unittest.TestCase):
+    def setUp(self):
+        self.doc = FreeCAD.newDocument("PartDesignTestSketch")
+        self.doc.UndoMode = True
+
+    def testPartBody(self):
+        self.doc.openTransaction("Create part")
+        part = self.doc.addObject("App::Part", "Part")
+        FreeCADGui.activateView('Gui::View3DInventor', True)
+        FreeCADGui.activeView().setActiveObject('part', part)
+        self.doc.commitTransaction()
+
+        self.doc.openTransaction("Create body")
+        body = self.doc.addObject('PartDesign::Body', 'Body')
+        part.addObject(body)
+        FreeCADGui.activateView('Gui::View3DInventor', True)
+        FreeCADGui.activeView().setActiveObject('pdbody', body)
+        self.doc.commitTransaction()
+
+        self.doc.undo() # undo body creation
+        self.doc.undo() # undo part creation
+
+        FreeCADGui.updateGui()
+
+        self.doc.openTransaction("Create body")
+        body = self.doc.addObject('PartDesign::Body', 'Body')
+        FreeCADGui.activateView('Gui::View3DInventor', True)
+        FreeCADGui.activeView().setActiveObject('pdbody', body)
+        self.doc.commitTransaction()
+
+        FreeCADGui.updateGui()
+
+    def tearDown(self):
+        FreeCAD.closeDocument("PartDesignTestSketch")

src/Mod/PartDesign/TestPartDesignGui.py

@@ -35,6 +35,7 @@ from PySide import QtGui, QtCore
 from PySide.QtGui import QApplication
 
 from PartDesignTests.TestMaterial import TestMaterial
+from PartDesignTests.TestActiveObject import TestActiveObject
 
 #timer runs this class in order to access modal dialog
 class CallableCheckWorkflow: