Vertex colors are not exported for unlit materials

[The0Dev]

Describe the bug
Hello. I cannot export vertex colors no matter what options I try when a shadeless node setup is used (a color factor+texture+vertex colors)

To Reproduce
Steps to reproduce the behavior:

1. Open the attached .blend file
2. Export it
3. See the result

Expected behavior
Vertex colors should be exported.

Screenshots

.blend file/ .gltf (mandatory)
bug_vertex_colors_unlit.blend.zip

Version

• OS: Linux
• Blender Version 4.2

[julienduroure]

Confirmed.

The used VC node/attribute is not detected correctly for now.
So an empty VC is created as COLOR_0 and the active VC is created as COLOR_1