"Internal Server Error: decoding Unicode is not supported" with ExpressionCaptcha

[kmilner@…]

I am using Trac-0.13dev_r9995 with TracSpamFilter-0.3.3dev_r9994. When enabling ExpressionCaptcha, I keep getting prompted to solve a new expression, even when answering it correctly. The problem seems to be caused by this internal error in the trac logs:

2010-08-12 13:26:10,236 Trac[main] ERROR: Internal Server Error: 
Traceback (most recent call last):
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 513, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 200, in dispatch
    chosen_handler)
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 346, in _pre_process_request
    chosen_handler = filter_.pre_process_request(req, chosen_handler)
  File "/usr/lib/python2.5/site-packages/TracSpamFilter-0.3.3dev_r9994-py2.5.egg/tracspamfilter/captcha/api.py", line 109, in pre_process_request
    if newhandler.match_request(req):
  File "build/bdist.linux-x86_64/egg/trac/wiki/intertrac.py", line 38, in match_request
    match = re.match(r'^/intertrac/(.*)', req.path_info)
  File "build/bdist.linux-x86_64/egg/trac/web/api.py", line 234, in path_info
    return unicode(path_info, 'utf-8')
TypeError: decoding Unicode is not supported

[Dirk Stöcker]

What task do you do when entering captcha? Trac ticket, webpage, …

The error is actually caused by trac/wiki/intertrac.py in the trac task to continue the previous job. Either the call for this job is wrong (it only simulates Trac behaviour) or there is a bug elsewhere in that code which is triggered by captcha code.

[Dirk Stöcker]

No answer. Closing as irreproducible.