Seps to reproduce:
1. Open the “UUM_138494.zip” project
2. Open "The Final Problem" Scene
3. Navigate to Window/Rendering/Lighting through the Main Menu
4. In the Scene tab of the Lighting Window, click the “Generate Lighting” Button
5. Observe the crash

Reproducible with versions: 6000.3.12f1, 6000.4.1f1, 6000.5.0b2, 6000.6.0a2
Not reproducible with versions: 6000.0.72f1, 6000.3.11f1

Reproducible on: macOS 15.7.4 (M1 Max), Windows 11 (user’s)
Not reproducible on: no other environment tested

First few lines of StackTraces:
#0 0x0000016957bc68 in mono_dump_mem
#1 0x000001694414f4 in mono_dump_native_crash_info
#2 0x000001694035cc in mono_handle_native_crash
#3 0x0000016938bdd4 in mono_sigsegv_signal_handler_debug
#4 0x0000019aa0d6a4 in _sigtramp

0x00007FFA46EB39DB (Unity) BakeJobConservativeRaster::Rasterize
0x00007FFA46EAC87C (Unity) BakeJobConservativeRaster::Execute
0x00007FFA46F668E9 (Unity) `anonymous namespace'::RenderLightmap
0x00007FFA46F5710B (Unity) LightBaker::Bake
0x00007FFA46FF071C (Unity) `anonymous namespace'::RunBake