Comment 1 for bug 308633

Not solved yet, but this is a far as I've come. I've done some experiments on my cleanroom jaunty sbuilder.

* The error does NOT happen when the package is built with cython_0.9.8-1. Thus it seems to be a regression in cython_0.10.2-1
* The error happens when setup.py is run by the -dbg version of Python.
* The error message comes from the file: /usr/share/python-support/cython/Cython/Distutils/build_ext.py, which is a part of cython. This file has not changed at least since cython_0.9.6.14-1 in intrepid (same md5sum)