examples/cursor.py gives RuntimeError on mac osx #3708

79-118-141-238:wigets ifmichael$ python cursor.py
Traceback (most recent call last):
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/figure.py", line 1040, in draw
    self.canvas.draw_event(renderer)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 1693, in draw_event
    self.callbacks.process(s, event)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py", line 527, in process
    proxy(*args, **kwargs)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py", line 405, in __call__
    return mtd(*args, **kwargs)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/widgets.py", line 865, in clear
    self.background = self.canvas.copy_from_bbox(self.ax.bbox)
AttributeError: 'FigureCanvasMac' object has no attribute 'copy_from_bbox'
Traceback (most recent call last):
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 1834, in motion_notify_event
    self.callbacks.process(s, event)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py", line 527, in process
    proxy(*args, **kwargs)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py", line 405, in __call__
    return mtd(*args, **kwargs)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/widgets.py", line 892, in onmove
    self._update()
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/widgets.py", line 899, in _update
    self.ax.draw_artist(self.linev)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/axes.py", line 2098, in draw_artist
    a.draw(self._cachedRenderer)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/lines.py", line 526, in draw
    gc = renderer.new_gc()
  File "/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/backends/backend_macosx.py", line 97, in new_gc
    self.gc.save()
RuntimeError: CGContextRef is NULL