Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-19 00:44, hash: rB5f140e61c28c
Short description of error
Bind in Laplacian Deform Modifier with newly made vertex group in Edit mode sometimes crashes Blender.
If blender is not crashed, an error message comes in console window.
[Please fill out a short description of the error here]
Exact steps for others to reproduce the error
Select the defaul cube and set mode to Edit Mode.
Make new vertex group and Add Laplacian Deform Modifier, set the vertex group and Bind.
Sometimes, the blender crashes, or, if is not crashed, error message that says vertex group is not valid comes to the console window.
I have captured two cases to animation gif images below.
If swithed to the object mode, I found nothing wrong.