CesiumGeoJsonDocumentRasterOverlay crashes Editor when used with Google Photorealistic 3D Tiles

[gojushin]

What happened?

When using the new CesiumGeoJsonDocumentRasterOverlay with the Google Photorealistic 3D Tileset, the Unity Editor crashes, when moving around In-Editor.

It does not seem to matter if the geojson is loaded from the filesystem or streamed from Ion.

I could not reproduce the bug on other 3D Tilesets - it seems to be limited to the Google Photorealistic 3D Tiles.

The bug seems to trigger more quickly when navigating directly over the Raster Overlay.

Environment

Cesium for Unity version: 1.23.0
Unity Editor Version: 6000.3.10f1
Operating System: Win11 64-Bit

Reproduction steps

1. To an empty scene add a CesiumGeoreference and a Cesium 3D Tileset as a child of that.
2. As Ion Asset Id use the Google Photorealistic 3D Tiles (2275207)
3. Add a Cesium GeoJson Document Raster Overlay Component to the child.
4. Load a GeoJson (either via local file or from Cesium Ion)
5. Move around in the Editor Viewport for a bit (I found flying closely over the Raster Overlay's area triggers the issue quicker)
6. Witness Editor Crash

Supporting evidence

Video Evidence on YouTube

[azrogers]

Thank you for the bug report! I'm wondering if this is related to CesiumGS/cesium-native#1314.

[gojushin]

@azrogers A little update for increased replicability.

This crashes the engine consistently for me (all be it with a ~2 second delay), without the need to fly around in Editor Mode:

public class CrashExample : MonoBehaviour
{
    [SerializeField] private Cesium3DTileset tileset;
    [SerializeField] private string geoJsonString;

    private void Start()
    {
        GameObject tilesetGameObject = tileset.gameObject;
        CesiumGeoJsonDocumentRasterOverlay geoJsonOverlay = tilesetGameObject.AddComponent<CesiumGeoJsonDocumentRasterOverlay>();
        CesiumGeoJsonDocument geoJson = CesiumGeoJsonDocument.Parse(geoJsonString);
        geoJsonOverlay.source = CesiumGeoJsonDocumentRasterOverlaySource.FromDocument;
        geoJsonOverlay.materialKey = "Clipping";
        geoJsonOverlay.document = geoJson;
    }
}