t33a.py demonstrates a compilation problem.  OK, it has a long line, but making it one space longer (add a space after the left parenthesis) makes it work... so it must not be line length alone.  Rather, since the error is about a bad UTF-8 character starting with \xc3, it seems that the UTF-8 decoder might play a role.  I was surprised that I could reduce the test case by removing all the lines before and after these 3: the original failure was in a much longer file to which I added this line.

Originally detected in 3.2.2, I upgraded to 3.2.3 and the problem still occurred.