UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-6: ordinal not in range(128)

[ragingwind@…]

How to Reproduce

While doing a GET operation on /tags, Trac issued an internal error.

The tags included in the WikiPage in Korean. It means is, I can see the error is, If this is the WikiPage name of the page to Korean.

Request parameters:

{'q': u"'lifeguide'"}

User agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.127 Safari/533.4

System Information

Trac	0.12
Genshi	0.6
mod_wsgi	3.2 (WSGIProcessGroup WSGIApplicationGroup %{GLOBAL})
pysqlite	2.4.1
Python	2.6.5 (r265:79063, Apr 9 2010, 15:16:58) [GCC 4.1.2 20080704 (Red Hat 4.1.2-48)]
setuptools	0.6c11
SQLite	3.3.6
jQuery	1.4.2

Enabled Plugins

TracGit	0.12.0.2dev-r7757
TracTags	0.6

Python Traceback

Traceback (most recent call last):
  File "build/bdist.linux-i686/egg/trac/web/main.py", line 513, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-i686/egg/trac/web/main.py", line 235, in dispatch
    resp = chosen_handler.process_request(req)
  File "build/bdist.linux-i686/egg/tractags/web_ui.py", line 99, in process_request
    data['tag_body'] =  macro.expand_macro(formatter, None, query)
  File "build/bdist.linux-i686/egg/tractags/macros.py", line 80, in expand_macro
    key=lambda r: str(r[0].id)):
  File "build/bdist.linux-i686/egg/tractags/macros.py", line 80, in <lambda>
    key=lambda r: str(r[0].id)):
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-6: ordinal not in range(128)

[ragingwind@…]

0.6 version still have this problem. for fixing, please refer #3334