Game crash when character is on fire with new global illumination enabled

[tunczyk110]

Describe the bug
When new global illumination is enabled (-gi 2 launch parameter), game crashes a few seconds after a character was set on fire (like through fireball spell). -gi 1 does not crash.

OS is Arch Linux, kernel 7.1.9.zen1-2. GPU is Radeon RX 9070 XT. Mesa driver version is 26.2.1.

Save-game/Log-file/Screenshots/Video
Save slot with a seeker nearby. To reproduce, launch the game with -gi 2 set. Let the seeker hit you with a fireball and wait a few seconds.
save_slot_19.zip

Application log
A relevant log line immediately before crash is radv/amdgpu: The CS has been cancelled because the context is lost. This context is innocent.

crash.log

[Try]

Hi, @tunczyk110 and thanks for report!

Look like a gpu-crash. Sadly there is no crash-logging for shaders, Based on your description - probably BVH builder crashed.
I'm not sure, when I can get to debug it. Just in case: relevant C++ side is at Renderer::prepareLightsBvh. Probably dummyfy numLights to zero will do as a workaround.