Error when trying to use TileMap.cell_quadrant_size in 4.2

[inhalt120g]

Godot version

v4.2.rc2.official [1ba920f]

System information

Godot v4.2.rc2 - macOS 14.1.1 - Vulkan (Forward+) - integrated Apple M1 - Apple M1 (8 Threads)

Issue description

Crash when trying to use "cell_quadrant_size".

The same project works without problems in 4.1.3

Steps to reproduce

Open the attached project and run it, it'll crash. "Invalid get index"

Here is what the same project looks like when launched from 4.1.3:

Minimal reproduction project

engage bug 03.zip

[akien-mga]

It was renamed to rendering_quadrant_size in 4.2, but it seems like we didn't include sufficient compatibility code to handle the transition.

CC @groud @KoBeWi

We should at least still handle the old property name in _get/_set. We have compatibility methods for GDExtension, but no compatibility property. And even the compat methods are not exposed to GDScript so using the methods fails too:

SCRIPT ERROR: Invalid call. Nonexistent function 'get_quadrant_size' in base 'TileMap'.
          at: _ready (res://project.gd:7)

That part is out of scope for 4.2, but we should either figure out if we can expose compat methods to GDScript/C#, or use them to provide better error handling.

[AThousandShips]

Note that this is also tracked here, but backwards compatibility would be helpful here at least some error

[inhalt120g]

Indeed it works with "rendering_quadrant_size", thanks!