Page .../trac/wiki presented internal error after trying to add a custom query.

[jru@…]

Page .../trac/wiki presented internal error after trying to add a custom query.

I tried to add the following custom query to the wiki-page.

[query:status=new|assigned|reopened&CC!=""&groupby=milestone List of CCs]

This resulted in that the page was not accessible anymore. The error message presented was:

Trac detected an internal error:
<lambda>() got multiple values for keyword argument 'group'

And the resulting python stack trace was:

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/modpython_frontend.py", line 206, in handler
    dispatch_request(mpr.path_info, mpr, env)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 139, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 107, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/wiki/web_ui.py", line 116, in process_request
    self._render_view(req, db, page)
  File "/usr/lib/python2.4/site-packages/trac/wiki/web_ui.py", line 364, in _render_view
    req.hdf['wiki.page_html'] = wiki_to_html(page.text, self.env, req)
  File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line 744, in wiki_to_html
    Formatter(env, req, absurls, db).format(wikitext, out, escape_newlines)
  File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line 599, in format
    result = re.sub(self.rules, self.replace, line)
  File "/usr/lib/python2.4/sre.py", line 142, in sub
    return _compile(pattern, 0).sub(repl, string, count)
  File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line 221, in replace
    return getattr(self, '_' + itype + '_formatter')(match, fullmatch)
  File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line 290, in _lhref_formatter
    return self._make_link(ns, target, match, label)
  File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line 295, in _make_link
    util.escape(label, False))
  File "/usr/lib/python2.4/site-packages/trac/ticket/query.py", line 631, in _format_link
    return '<a class="query" href="%s">%s</a>' \
  File "/usr/lib/python2.4/site-packages/trac/ticket/query.py", line 174, in get_href
    format=format, **self.constraints)
TypeError: <lambda>() got multiple values for keyword argument 'group'

It is also not possible to get back to that page to edit it and remove the custom query.

[cboos]

Duplicate of #2818.