System Information
Operating system: dual xeon x5680 @3.33Ghz (2 processors) 24GB RAM. Win 64bit
Graphics card: Nvidia gts 450

Blender Version
Broken: 2.80 Beta, 4fe0fafb8 master, 2019-07-24
Worked:

Short description of error
When entering look dev mode blender crashes

Exact steps for others to reproduce the error
in this case I think it is caused by the build of this PC (my brother pc)
He doesn't use ir for 3D rendering, mostly to calculate structures so he doesn't need a good graphics card, but cores. Maybe is because of this graphic card is too old. Or maybe It is the dual xeon... I don't know. Is not a .blend file problem. Thats for sure, because it happens with any blender file