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trace.py tries to get coverage information from non Python files, which raises a
SyntaxError because the file doesn't contain valid Python code.
I've attached a path that fixes this problem in Python 2.5.

Your remark is certainly valid, but where does this occur? Some tool
that generate python code on the fly?
Do you have an example, a use case?

Hi, Amaury.
I found this problem using the Bitten continuous integration system
(http://bitten.edgewall.org/ticket/304).
I'm using the TurboGears framework with Genshi, and therefore
mypackage.templates module should contain non-Python files. Here you'll find
its contents:
https://tracker.gnulinuxmatters.org/browser/animador/trunk/animador/template
This is the only situation where the problem occurs, AFAIK.
If you want to reproduce it, you can:
 1.- Install Bitten:
easy_install http://svn.edgewall.org/repos/bitten/trunk/
 2.- Install my package:
svn co https://svn.gnulinuxmatters.org:81/animador/trunk/ animador
cd animador
./setup.py develop
 3.- Run Bitten's "unittest" extension for setuptools under my package with the
following options:
./setup.py unittest --xml-output build/test-results.xml --coverage-summary
build/test-coverage.txt --coverage-dir build/coverage
Then you'll get a SyntaxError if the patch I attached is not applied.
Cheers.

The patch adds this check:
+	 if not filename.endswith((".pyc", ".pyo", ".py")):
+ continue
This is not valid. A Python file is a text file with python code. In spite of import conventions, they are not required to have any particular extension and some people omit them from main scripts. Trace works fine with such files now and your patch would prevent that. Python files are only identified as such by trying to parse them.
The problem and solution lie with your setup. Arrange things so Bitten only treats Python files as Python files.