Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.70
Broken: version: 2.81 (sub 13), branch: master, commit date: 2019-10-04 22:33, hash: rBab519b91b2c4
Worked: 2.80 release
Setting the integrator to branched pathtracing ( I used CPU) changes diffuse colors of objects in file "barbershop_interior_cpu.blend" from https://www.blender.org/download/demo-files/
Pictures of the render error can be seen here:
Exact steps for others to reproduce the error
Set the integrator to branched and hit render.