**System Information**
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 432.00
**Blender Version**
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: `rBf1aa4d18d49d`
Worked: (optional)
**Short description of error**
Program hangs indefinitely when attempting to get list of, or iterate, "link_loops" property of BMElemSeq, accessed from bmesh created from object in blend file{F8263956}
**Exact steps for others to reproduce the error**
1) load attached blend file
2) Switch to Scripting View
3) Run the following python script code:
```
import bmesh
obj = bpy.context.scene.objects[0]
bm = bmesh.new()
bm.from_mesh(obj.data)
bm.verts.ensure_lookup_table()
len(bm.verts[0].link_loops)
```