`IsInstanceValid` called before the end of the frame returns true on an object that called `QueueFree`

[IurieYSI]

Tested versions

tested on v4.3.stable.mono.official

System information

Windows 10 - Godot v4.3.stable.mono.official

Issue description

If we call node.QueueFree(), IsInstanceValid(node) should return false even before the end of the frame.
I can't think of a reason why would anyone need to have IsInstanceValid(node) returning true after a node.QueueFree() call.

Steps to reproduce

1. Create a node,
2. Print out IsInstanceValid
3. QueueFree the node
4. Print out IsInstanceValid

It prints out

true
true

and I think it must print out

true
false

Minimal reproduction project (MRP)

ColorRect n = new ColorRect();
AddChild(n);
GD.Print(IsInstanceValid(n));
n.QueueFree();
GD.Print(IsInstanceValid(n));

[AThousandShips]

You can just use IsQueuedForDeletion to get that status

[Blue-EyesWhiteDragon]

It is queued to be freed from memory.
"Unlike with Object.free, the node is not deleted instantly, and it can still be accessed before deletion. It is also safe to call queue_free multiple times. Use Object.is_queued_for_deletion to check if the node will be deleted at the end of the frame." - Godot Documentation

[AThousandShips]

There's a lot of behind the scenes code that depends on the behavior of this, or rather on what is_instance_valid checks, so to change this we would either have to make the bound function not work the same way or check for the queued status, or this would break a lot of internal code that is allowed to operate on the object until it is actually freed

That's exactly why queue_free exists, it's there to not break internal things that might operate on it before the end of the frame, otherwise you'd just use free