Sketch - hull intersecting faces

[helmecke]

Getting ZeroDivisionError: float division by zero trying to hull intersecting faces.

Not working:

import cadquery as cq

r = cq.Sketch().circle(2).rarray(1, 5, 1, 2).circle(1).wires().hull()

show_object(r)

Failed workaround:

import cadquery as cq

r = cq.Sketch().circle(2).rarray(1, 5, 1, 2).circle(1.1, "s").circle(1).wires().hull()

show_object(r)

Working:

import cadquery as cq

r = cq.Sketch().circle(2).rarray(1, 7, 1, 2).circle(1).wires().hull()

show_object(r)

Stacktrace:

(cq) $ python 008.py      
Traceback (most recent call last):
  File "/home/jakob/Git/github.com/helmecke/cadquery-models/exercises/008.py", line 11, in <module>
    r = cq.Sketch().circle(2).rarray(1, 5, 1, 2).circle(1).wires().hull()
  File "/home/jakob/.local/share/miniconda3/envs/cq/lib/python3.9/site-packages/cadquery/sketch.py", line 484, in hull
    rv = find_hull(el for el in self._faces.Edges())
  File "/home/jakob/.local/share/miniconda3/envs/cq/lib/python3.9/site-packages/cadquery/hull.py", line 395, in find_hull
    angle, segment = get_angle(current_e, e)
  File "/home/jakob/.local/share/miniconda3/envs/cq/lib/python3.9/site-packages/cadquery/hull.py", line 312, in get_angle
    return arc_arc(current, e)
  File "/home/jakob/.local/share/miniconda3/envs/cq/lib/python3.9/site-packages/cadquery/hull.py", line 262, in arc_arc
    dx /= l
ZeroDivisionError: float division by zero