UnicodeEncodeError: 'ascii' codec can't encode characters in position 14-15: ordinal not in range(128)

[fengxf]

How to Reproduce

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

(please provide additional details here)

Request parameters:

{}

User agent: Mozilla/5.0 (X11; U; Linux x86_64; zh-CN; rv:1.9.2.20) Gecko/20110804 SUSE/3.6.20-0.2.1 Firefox/3.6.20

System Information

Trac	0.12.2
Babel	0.9.6
Docutils	0.6
Genshi	0.6
Mercurial	1.9.2+3-86380f24e697+20110908
Pygments	1.3.1
pysqlite	2.4.1
Python	2.6.5 (r265:79063, May 6 2011, 17:25:59) [GCC 4.5.0 20100604 [gcc-4_5-branch revision 160292]]
setuptools	0.6c11
SQLite	3.6.23
Subversion	1.6.17 (r1128011)
jQuery	1.4.2

Enabled Plugins

TracMercurial

0.12.0.28dev-r10784

Python Traceback

Traceback (most recent call last):
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 511, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "build/bdist.linux-x86_64/egg/trac/timeline/web_ui.py", line 213, in process_request
    format='rss')
  File "build/bdist.linux-x86_64/egg/trac/web/href.py", line 181, in <lambda>
    self._derived[name] = lambda *args, **kw: self(name, *args, **kw)
  File "build/bdist.linux-x86_64/egg/trac/web/href.py", line 175, in __call__
    href += '?' + unicode_urlencode(params, self.query_safe)
  File "build/bdist.linux-x86_64/egg/trac/util/text.py", line 118, in unicode_urlencode
    k = quote_plus(str(k), safe)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 14-15: ordinal not in range(128)

[Christian Boos]

Duplicate of #10121.