Traceback (most recent call last):
  File "divider.py", line 52, in <module>
    DE10NanoPlatform().build(FixedPointDivider(12, 4), do_program=False)
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/build/plat.py", line 73, in build
    plan = self.prepare(elaboratable, name, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/build/plat.py", line 113, in prepare
    fragment = Fragment.get(elaboratable, self)
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/hdl/ir.py", line 67, in get
    obj = obj.elaborate(platform)
  File "divider.py", line 36, in elaborate
    i = Cat([signal for signal in i])[:self.width]
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/hdl/ast.py", line 726, in __init__
    self.parts = [Value.cast(v) for v in flatten(args)]
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/hdl/ast.py", line 726, in <listcomp>
    self.parts = [Value.cast(v) for v in flatten(args)]
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/_utils.py", line 20, in flatten
    yield from flatten(e)
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/_utils.py", line 20, in flatten
    yield from flatten(e)
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/_utils.py", line 20, in flatten
    yield from flatten(e)
  [Previous line repeated 981 more times]
  File "/usr/local/lib/python3.7/dist-packages/nmigen-0.1-py3.7.egg/nmigen/_utils.py", line 19, in flatten
    if isinstance(e, Iterable):
  File "/usr/lib/python3.7/abc.py", line 139, in __instancecheck__
    return _abc_instancecheck(cls, instance)
RecursionError: maximum recursion depth exceeded in comparison