Operating system: Darwin-19.6.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 575 OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.10.8
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-13 21:25, hash: rBb325ecef9c26
Worked: (newest version of Blender that worked as expected)
Short description of error
Blender 2.90 Alpha work for a while make crash guide.
Exact steps for others to reproduce the error
between belly through tail.
From Vertex click to Face
also Add materials and rename to "Extra Select" on materials
Crash might occur, hard to reproduce.