Operating system: Windows-10-10.0.16299-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.86
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-08 15:55, hash: rB9f7d84b656fb
Short description of error
In the attached file there's a fragment of a mesh from my project. When I try to bake a texture using that mesh it immediately crashes Blender. If you uncheck "motion blur", it will perform a bake but color will not bake properly. I can't reproduce with a new object.
Exact steps for others to reproduce the error
Open attached file. Press bake.
I noticed that smooth shading is incorrect in 2.90 but only in edit mode:
Perhaps something went wrong when object from earlier version was opened in 2.90.