I get the following exception:

$ /opt/python3.0b2/bin/python3.0 -m trace -c -m run.py
Traceback (most recent call last):
  File "/opt/python3.0b2/lib/python3.0/runpy.py", line 121, in
_run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/opt/python3.0b2/lib/python3.0/runpy.py", line 34, in _run_code
    exec(code, run_globals)
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 809, in <module>
    main()
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 806, in main
    results.write_results(missing, summary=summary, coverdir=coverdir)
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 303, in write_results
    lnotab = find_executable_linenos(filename)
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 428, in
find_executable_linenos
    return find_lines(code, strs)
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 392, in find_lines
    linenos.update(find_lines(c, strs))
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 386, in find_lines
    linenos = find_lines_from_code(code, strs)
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 370, in
find_lines_from_code
    line_increments = [ord(c) for c in code.co_lnotab[1::2]]
  File "/opt/python3.0b2/lib/python3.0/trace.py", line 370, in <listcomp>
    line_increments = [ord(c) for c in code.co_lnotab[1::2]]
TypeError: ord() expected string of length 1, but int found

I think that line 370 of trace.py should say:

line_increments = [int(c) for c in code.co_lnotab[1::2]]

instead of:

line_increments = [ord(c) for c in code.co_lnotab[1::2]]