Editor crashes with SIGSEGV when dragging a Sub Scene into a duplicated Sub Scene

Unity: Core Runtime

Fixed

6.7.X

6000.7.0a2

6.6.X

6000.6.0b3

6.5.X

6000.5.3f1

Steps to reproduce:
1. Create new Unity project using Universal 3D Template
2. Open Package Manager window and install Entities package
3. In Hierarchy window create a Sub Scene
4. Duplicate created Sub Scene
5. Drag first Sub Scene to duplicated Sub Scene
6. Observe the Editor

Actual results: The Editor crashes with a SIGSEGV when draggin duplicated Sub Scene to original Sub Scene

Expected results: The Editor should not crash, either the drag operation should be blocked with an appropriate warning/error, or the duplicate
reference should be handled gracefully without crashing the Editor

Reproducible with versions: 6000.5.0b10, 6000.6.0a6

Can’t test with versions: 6000.4.9f1 and lower (Sub Scenes behavior is different)

Tested on (OS): macOS Tahoe 26.4.1 (M1)

Stack trace:

 Sub Scenes can not reference the same scene
  ('Assets/Scenes/SampleScene/New Sub Scene.unity') multiple times.
                                                                                                                               
  Unity.Scenes.SubScene:WarnIfNeeded () (at SubScene.cs:244)
  Unity.Scenes.SubScene:OnEnable () (at SubScene.cs:312)                                                                       
  UnityEditor.ClipboardUtility:DuplicateGO (UnityEngine.Transform)
  Unity.Hierarchy.Editor.HierarchyGameObjectHandler:Unity.Hierarchy.IHierarchyEditorNodeTypeHandler.OnDuplicate                
  (Unity.Hierarchy.HierarchyView)                                                                              
  Unity.Hierarchy.HierarchyViewOperationExtension:OnDuplicate (Unity.Hierarchy.HierarchyView)                                  
  Unity.Hierarchy.Editor.HierarchyWindow:OnExecuteCommand (UnityEngine.UIElements.ExecuteCommandEvent)
  Unity.Hierarchy.Editor.HierarchyWindow/CommandSubscriberHelper:OnExecuteCommand (UnityEngine.UIElements.ExecuteCommandEvent) 
  UnityEditor.ShortcutManagement.ShortcutIntegration:EventHandler ()                                                           
  UnityEditor.EditorApplication:Internal_CallGlobalEventHandler ()                                                             
                                                                                                                               
  UDS Service: [Error] Cleaning UDS resources due to detecting an unexpected signal: SIGSEGV                                   
   #2 crash_handler(int)                                                                                                       
   #3 _sigtramp                                                                                                                
   #4 (anonymous namespace)::CleanUpMap::Perform(int, bool)                                                                    
   #5 main        
   #6 start

Editor crashes with SIGSEGV when dragging a Sub Scene into a duplicated Sub Scene

Unity: Core Runtime

Fixed

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

Editor crashes with SIGSEGV when dragging a Sub Scene into a duplicated Sub Scene

Unity: Core Runtime

Statuses

Fixed

Resolution Notes

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?