BakedLightmap crash on bake 3.2.4 beta 6

[Wavesonics]

Godot version:
3.2.4 beta 6

OS/device including version:
Win 64 GLES3

Issue description:
Trying to bake a scene using the new light mapper, and it crashes with the following error in terminal:

Embree error: you have to wait for spawned subtasks
terminate called after throwing an instance of 'std::runtime_error'
  what():  you have to wait for spawned subtasks

Steps to reproduce:
Open my scene that used the old light mapper, Select the node, hit "Bake Lightmap"

Godot either hangs forever, or outright crashes.

Minimal reproduction project:
I'm working on it. My project is fairly large:
https://github.com/FugitiveTheGame/Fugitive3D

I'm trying to see if I can repro with something smaller.

[akien-mga]

Likely a duplicate of #45097, Embree doesn't like MinGW-GCC :|

[akien-mga]

Can you test either build from #45097 (comment) to see if it solves the issue? If so that would confirm it as a duplicate of #45097, and that that issue finally got fixed 🎉

[Wavesonics]

Yup! The build you linked to doesn't crash, and the light maps bake correctly, and look great!