pygal.Line() render_to_file: OverflowError: cannot convert float infinity to integer

I'm still trying to isolate a testcase, but I'm seeing this with a particular dataset:

File "/opt/local/python-3.6.1/lib/python3.6/site-packages/pygal/graph/public.py", line 114, in render_to_file

    f.write(self.render(is_unicode=True, **kwargs))

  File "/opt/local/python-3.6.1/lib/python3.6/site-packages/pygal/graph/public.py", line 52, in render 

    self.setup(**kwargs)

  File "/opt/local/python-3.6.1/lib/python3.6/site-packages/pygal/graph/base.py", line 217, in setup 

    self._draw()

  File "/opt/local/python-3.6.1/lib/python3.6/site-packages/pygal/graph/graph.py", line 926, in _draw 

    self._compute_y_labels()

  File "/opt/local/python-3.6.1/lib/python3.6/site-packages/pygal/graph/graph.py", line 853, in _compute_y_labels

    self.order_min, self.min_scale, self.max_scale

  File "/opt/local/python-3.6.1/lib/python3.6/site-packages/pygal/util.py", line 163, in compute_scale

    order = round(log10(max(abs(min_), abs(max_)))) - 1

OverflowError: cannot convert float infinity to integer

Start in pygal/graph/graph.py at _compute_y_labels and follow the call to pygal/util.py compute_scale shown in the traceback. First isolate a reproducible testcase from the reported dataset, then run the rendering path and verify that render_to_file completes without the OverflowError.

Written by the indexing model from the issue text.