Assembly: Create joint: prevent errors on undo/ctrl-Z

src/Mod/Assembly/CommandCreateJoint.py

@@ -59,7 +59,10 @@ def activateJoint(index):
         JointObject.activeTask.reject()
 
     panel = TaskAssemblyCreateJoint(index)
-    Gui.Control.showDialog(panel)
+    dialog = Gui.Control.showDialog(panel)
+    if dialog is not None:
+        dialog.setAutoCloseOnTransactionChange(True)
+        dialog.setDocumentName(App.ActiveDocument.Name)
 
 
 class CommandCreateJointFixed:

src/Mod/Assembly/JointObject.py

@@ -1383,6 +1383,9 @@ class TaskAssemblyCreateJoint(QtCore.QObject):
             self.joint.Visibility = self.visibilityBackup
         return True
 
+    def autoClosedOnTransactionChange(self):
+        self.reject()
+
     def deactivate(self):
         global activeTask
         activeTask = None