System Information
Operating system: Windows-10-10.0.17134-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.11

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-08 09:32, hash: rBa3e2cc0bb7fe
Worked: (newest version of Blender that worked as expected)

Short description of error
I am not sure how to name the title, because there are so many ways to cause a crash in this file.
You can slide values, or change the mode of socket.
The easiest method to crash in the provided file, is to slide this vector math socket in this node tree.

(Note, I've experienced many other geometry nodes crash when sliding values or others.
Not known if they are related, or caused by the same issue.
But I hope this report can solve all similar issues)

Exact steps for others to reproduce the error

• Open .blend file
• Slide input value value of Vector Math node or change the mode of socket.