System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 950M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 445.87
Blender Version
Broken: version: 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: rB0330d1af29c0
Worked: (newest version of Blender that worked as expected)
Short description of error
Crash when try move vert/edge/face with proportional editing enabled and symmetry activated, in edit mode.
Exact steps for others to reproduce the error
Enter editmode try to move mesh parts.