Deleting an object that has been assigned as the object following for a view will corrupt the project, making it give compile and project load errors

[KormexGit]

Description

If you assign an object as the object for a view to automatically follow and then delete that object, the reference to the object in the room files will not be cleared. This makes it so the project cannot be compiled, and if you close it and attempt to reopen it, it will give project load errors. The only way to recover the project is to manually edit the .yy file for every room the object was used for view following in.

Steps To Reproduce

1. Create an object
2. Open up a room's view settings and assign the object under Object Following
3. Delete the object
4. The project is now broken

Which version of GameMaker are you reporting this issue for?

IDE v2024.1100.0.703 Runtime v2024.1100.0.719

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

Windows 10.0.22631.0

48e9a486-b132-4fbb-831c-690d9a9a833b

[scott-dunbar]

I can no longer reproduce this with the given steps but the project attached to this does still fail to open due to a missing object

Reopening for review in triage

Tested in IDE v2024.1300.0.764 Runtime v2024.1300.0.774

[stuckie]

Yes.. the project is broken because of this.
It will need more thought on how to fix this as the serialiser has failed it on loading, because it cannot find the resource reference.
It is also part of a GMRView which is not a resource itself, so our normal way of repairing these cannot work.

[stuckie]

Going to mark this particular issue as closed now, as it should no longer happen.
For tracking how we can fix broken projects, please see: #9650

[scott-dunbar]

Verifying as fixed based on above discussion regarding already broken projects.