OpenGL: Selecting a lightmap EXR texture in the FileSystem dock prints an error about SamplerCubeArray not being supported

[Calinou]

Tested versions

• Reproducible in: 4.3.beta 92c8e87

System information

Godot v4.3.beta (92c8e87) - Fedora Linux 40 (KDE Plasma) - X11 - GLES3 (Compatibility) - NVIDIA GeForce RTX 4090 (nvidia; 555.58.02) - 13th Gen Intel(R) Core(TM) i9-13900K (32 Threads)

Issue description

When using Compatibility, the first time you double-click a lightmap EXR texture in the FileSystem dock, you get an error:

drivers/gles3/storage/material_storage.cpp:950 - Type: SamplerCubeArray not supported in GL Compatibility rendering backend, please use another type.

The editor keeps functioning normally and lightmaps still render correctly.

It's strange that this error appears, as lightmap textures use Texture2DArray, not CubemapArray. Cubemap arrays are generally only used for reflections (and the Compatibility rendering method doesn't use those).

Steps to reproduce

• Select a lightmap EXR texture in the FileSystem dock while using the Compatibility rendering method.

Minimal reproduction project (MRP)

test_lightmap_environment.zip