crash while generating g-code with dev version

[shimpe]

Traceback (most recent call last):
File "gcodetools-dev.py", line 7870, in
gcodetools.affect()
File "/usr/share/inkscape/extensions/inkex.py", line 283, in affect
self.effect()
File "gcodetools-dev.py", line 7786, in effect
self.path_to_gcode()
File "gcodetools-dev.py", line 5480, in path_to_gcode
b.from_old_style(c)
File "/usr/share/inkscape/extensions/biarc.py", line 785, in from_old_style
self.clean()
File "/usr/share/inkscape/extensions/biarc.py", line 620, in clean
closed = self.items[i][0].st.near(self.items[i][-1].end)
IndexError: list index out of range