Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Intel(R) HD Graphics 630 Intel 4.5.0 - Build 126.96.36.19980
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-23 19:18, hash: rB65006bfaf4ef
Worked: 2.83LTS or until some 2.90 alpha version between May 20th - June 1st, 2020
Short description of error
Opening Material Properties Tab crashes Blender
Exact steps for others to reproduce the error
Program crashes as soon Material Properties tab is opened or by clicking on browse material in Shader Editor.
Happens in any fresh install of 2.90 alpha with default cube.
My guess is there's something to do with material preview. If these steps described above are avoided, shaders load in Eevee or Cycles just fine and no issues in editing material nodes.