nonlocal with no existing variable produces too many errors

[lebigot]

The following code

def f():
    nonlocal x
    x = 123

shows additional, IPython errors after the normal SyntaxError:

During handling of the above exception, another exception occurred:
(…)
TypeError: %d format: a number is required, not NoneType

During handling of the above exception, another exception occurred:
(…)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/IPython/core/ultratb.py", line 573, in _format_exception_only
  Colors.linenoEm, value.lineno, Colors.Normal  ))

TypeError: %d format: a number is required, not NoneType

It seems to me that the latter errors should not be printed.

[takluyver]

Thanks, this has already been fixed in master - see pull request #2503.