Crash in 4.17.1 when disabling occlusion culling and dbuffer decals

I’m getting this with a source built engine (4.17.2 source). Any workaround to get the editor to launch? If there’s a commit I can merge in that would be great. I could live with enabling occlusion culling if there’s an ini file setting for that (it’s just not needed in my project).

[This happens on startup, so 4.17.2 is a bit dead to me at the moment].