System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.48

Blender Version
Broken: version: 2.81 (sub 14), branch: master, commit date: 2019-10-08 20:10, hash: rB6d3c34fe9d1e
Worked: (optional)

Short description of error

Both viewports for Material Preview and Render Preview are in an infinite loop, never finishing and fully maximizing power from CPU or GPU.

Exact steps for others to reproduce the error

Started with the latest daily build. It appears to be caused by a normal map in one of the materials (headlight lens bumpy).... when I detach the map, the problem goes away.

I've attached the blend file for testing.