GSPen.py errors

[weiweihuanghuang]

Trying to run

import GSPen
Glyphs.clearLog()

GSPen.test()

Gives me these errors:

Traceback (most recent call last):
  File "<string>", line 4, in <module>
  File "~/Library/Application Support/Glyphs/Scripts/GSPen.py", line 80, in test
    p = GSPen(RGlyph(g))
  File "~/Library/Application Support/Glyphs/Scripts/GSPen.py", line 20, in __init__
    SegmentToPointPen.__init__(self, GSPointPen(r_glyph))
TypeError: __init__() takes exactly 3 arguments (2 given)

[weiweihuanghuang]

Still trying to use test but get this error.