[New-bugs-announce] [issue10329] trace.py and unicode in Python 3

Walter Dörwald report at bugs.python.org
Fri Nov 5 16:01:38 CET 2010

New submission from Walter Dörwald <walter at livinglogic.de>:

It seems that on Python 3 (i.e. the py3k branch) trace.py can not handle source that includes Unicode characters. Running the test suite with code coverage info via

   ./python Lib/test/regrtest.py -T -N -uurlfetch,largefile,network,decimal

sometimes fails with the following exception:

Traceback (most recent call last):
  File "Lib/test/regrtest.py", line 1500, in <module>
  File "Lib/test/regrtest.py", line 696, in main
    r.write_results(show_missing=True, summary=True, coverdir=coverdir)
  File "/home/coverage/python/Lib/trace.py", line 319, in write_results
    lnotab, count)
  File "/home/coverage/python/Lib/trace.py", line 369, in write_results_file
UnicodeEncodeError: 'ascii' codec can't encode character '\xe4' in
position 30: ordinal not in range(128)

The script that produces code coverage info on http://coverage.livinglogic.de/ uses this feature to generate code coverage info.

Applying the attached patch (i.e. specifying an explicit encoding when opening the output file) fixes the problem.

files: trace.diff
keywords: patch
messages: 120506
nosy: doerwalter, haypo
priority: normal
severity: normal
status: open
title: trace.py and unicode in Python 3
Added file: http://bugs.python.org/file19505/trace.diff

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