I see the same error on Windows (when pressing ^C), but on Linux I get

Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib/python2.7/atexit.py", line 28, in _run_exitfuncs
    import traceback
  File "/usr/lib/python2.7/traceback.py", line 3, in <module>
    import linecache
  File "/usr/lib/python2.7/linecache.py", line 9, in <module>
    import os
  File "/usr/lib/python2.7/os.py", line 119, in <module>
    sys.modules['os.path'] = path
AttributeError: 'module' object has no attribute 'modules'

This also suggests that module teardown has begun before/while sys.exitfunc is running.