Error when a report with custom query is opened for the second time, by using the saved URL.

[sdeshmukh@…]

Traceback (most recent call last):
  File "e:\python23\lib\site-packages\trac\web\main.py", line 335, in dispatch_request
    dispatcher.dispatch(req)
  File "e:\python23\lib\site-packages\trac\web\main.py", line 220, in dispatch
    resp = chosen_handler.process_request(req)
  File "e:\python23\lib\site-packages\trac\ticket\query.py", line 443, in process_request
    self.display_html(req, query)
  File "e:\python23\lib\site-packages\trac\ticket\query.py", line 608, in display_html
    req.hdf['query.num_matches_group'] = num_matches_group
  File "e:\python23\lib\site-packages\trac\web\clearsilver.py", line 195, in __setitem__
    self.set_value(name, value, True)
  File "e:\python23\lib\site-packages\trac\web\clearsilver.py", line 243, in set_value
    add_value(name, value)
  File "e:\python23\lib\site-packages\trac\web\clearsilver.py", line 235, in add_value
    add_value('%s.%s' % (prefix, k), value[k])
  File "e:\python23\lib\site-packages\trac\web\clearsilver.py", line 242, in add_value
    set_str(prefix, value)
  File "e:\python23\lib\site-packages\trac\web\clearsilver.py", line 213, in set_str
    self.hdf.setValue(prefix.encode('utf-8'), str(value))
Error: Traceback (innermost last):
  File "neo_hdf.c", line 783, in hdf_set_value()
  File "neo_hdf.c", line 773, in _set_value()
AssertError: Unable to set Empty component query.num_matches_group.

[cboos]

This is a duplicate of #4218. It has been fixed for the 0.10.4 release, please upgrade.