Full Unity Crash on Play in Editor with Unity 5.5.1p2

My game has been working with SteamVR for a while and I'm trying to add in Oculus support. I added Oculus utilities, enabled the SDK in player settings, and setup NewtonVR to have Oculus and Vive support. I can get the same steps to work in a test project, but in my actual project, when I hit play, Unity runs for a moment, then fully crashes to the bug report window. Can anyone glean some info from my logs to guide my troubleshooting?

Thanks,
Ian

here is the relevant point in the logs, it gets through a frame or two apparently, and is calling functions from Start on some scripts:

It seems like something to do with Lab Renderer, but since that works in a project on its own, i think it might be whatever is coming next, and is just not logged?

 

are you using native Unity3D Oculus support?

 

Yes as I wrote, I enabled the sdk in the player settings, which is the native support, and added the oculus utilities package from oculus to get access to the ovrboundary interface and other stuff.

 

I tracked this down a little more, and it starts happening when I upgrade to SteamVR 1.2. Before I added any of the oculus stuff.