Cannot draw vertical triangles

[yuxi-liu-wired]

surface([0, 0, 1],[0, 0, 0], [1, 0, 0])

It seems to be not expecting vertical surfaces.

QH6022 qhull input error: 1'th dimension's new bounds [-0.5, 0.5] too wide for
existing bounds [ 0,  0]

While executing:  | qhull d Qt QbB Qz
Options selected for Qhull 2015.2 2016/01/18:
  run-id 1600744826  delaunay  Qtriangulate  QbBound-unit-box 0.5
  Qz-infinity-point  _pre-merge  _zero-centrum  Pgood
Error in Delaunay triangulation calculation

Pre-filling the graph with things that it can draw does not help. This gives the same error:

surface([0, 0, 1, 1],[0, 1,1, 0], [1, 0, 0, 1])
surface!([0, 0, 1],[0, 0, 0], [1, 0, 0])

[yuxi-liu-wired]

Also, even drawing horizontal surfaces gives errors when the triangular mesh gets too flat:

surface([0, 0, 1, 1],[0, 1,1, 0], [0,0,0,0])

gives

GKS: Rectangle definition is invalid in routine SET_WINDOW
GKS: Rectangle definition is invalid in routine CELLARRAY
invalid range

Compare this with

surface([0, 0, 1, 1],[0, 1,1, 0], [0,0,0.1,0])

which gives no error.

[t-bltg]

@yuxiliu1995 , would #3612 close this ?