Room Editor: GM crashes if File Watcher is set to "auto-reload" and external app modifies a room .yy file

[nullbunny]

Description

I was working on my level and discarded the recent changes via git.

GM froze for a few seconds and then silently closed itself without any error messages.

The same has happened before when I was manually changing a position of an instance in VS Code.

I have GM set up to auto-reload when files change.

ui.log says:

[12:20:59:000(ceb0)] --------------------------------------------------------------------------------
[12:20:59:001(ceb0)] IDE Exception: System.NullReferenceException: Object reference not set to an instance of an object.
   at YoYoStudio.Plugins.RoomEditor.RoomEditor_SelectedItem.UpdateProperties(Boolean _layoutUpdate)
   at YoYoStudio.Plugins.RoomEditor.RoomEditor_Room.RefreshSelectedBounds()
   at YoYoStudio.Plugins.RoomEditor.RoomEditorModule.Tick()
   at YoYoStudio.Plugins.Command.execute_object(String _command, Object _focus, Object[] paramaters)
   at YoYoStudio.Plugins.Command.execute_object(String _command, Object _focus, Object[] paramaters)
   at YoYoStudio.IDE.Run()
   at YoYoStudio.IDE.Execute(String[] _args, Int32 _initialWidth, Int32 _initialHeight)
[12:20:59:001(ceb0)] --------------------------------------------------------------------------------

Steps To Reproduce

Git:

1. Make changes to a room that involve instances or assets on an asset layer - adding, moving, etc.
2. Discard those changes with GIT

VS Code:

1. Open a room in GM
2. Open the room in VS Code
3. Modify the position value, for example, move X or Y by a small amount.

Which version of GameMaker are you reporting this issue for?

IDE v2024.8.0.169 Runtime v2024.8.0.216

Which operating system(s) are you seeing the problem on?

Windows 10.0.19045.0

315accbb-92c7-4698-ab7b-b35c57713239