Regular Vulkan script runs, but has flickering shadows, and the occasional complete screen flicker.
OpenGL 4 script runs, but crashes after turning the first corner.
Low-end Vulkan script crashes immediately.
i7-7700K + RX580, Mesa 20.0.1-r1 (ACO enabled / disabled, didn't matter), Linux 5.5.0 (w/ post factum patchset), Fully up-to-date Gentoo
Logs and full system info: https://files.ecmelberk.com/pb-crash-details.7z