Mesh.delete_face(fkey) raises KeyError when used on triangulated Rhinocommon meshes.

Describe the bug Mesh.delete_face(fkey) raises KeyError when used on triangulated Rhinocommon meshes.

Mesh.is_quadmesh() returns True for some reason, and return from Mesh.insert_vertex(fkey) contains an extra face consisting of vertex keys [x, x, y] instead of expected [x, y, z].

To Reproduce Steps to reproduce the behavior:

1. Grasshopper
2. Sample script

from compas_rhino.geometry import RhinoMesh
from compas_ghpython.artists import MeshArtist

mesh = RhinoMesh.from_geometry(mesh).to_compas()

assert mesh.is_quadmesh()

key = mesh.get_any_face()
mesh.delete_face(key)

artist = MeshArtist(mesh)
rhino_mesh = artist.draw_mesh()

4. See error

Runtime error (KeyNotFoundException): KeyError

Traceback:
  line 737, in delete_face, "C:\Users\a\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\compas\datastructures\mesh\core\halfedge.py"
  line 10, in script

Desktop (please complete the following information):

• OS: Windows 10
• Rhino 6 SR4 2.7.8 (IronPython 2.7.8 (2.7.8.0) on .NET 4.0.30319.42000 (64-bit))
• compas==0.15.5 installed using conda.

[brgcode]

the fix has been pushed and is building. please check if it fixes your problem…

[tetov]

Fixed in 857a29e0