TypeError: unhashable type when installing trac-0.10.3 with mysql

[batfung@…]

I got the following error when I am installing the trac 0.10.3 on MySQL 4.1.14 using MySQL-python-1.2.1_p2 (MySQLdb):

Creating and Initializing Project
 Installing default wiki pages
 /usr/share/trac/wiki-default/WikiPageNames => WikiPageNames
 /usr/share/trac/wiki-default/TracPermissions => TracPermissions
 /usr/share/trac/wiki-default/InterTrac => InterTrac
 /usr/share/trac/wiki-default/TracPlugins => TracPlugins
 /usr/share/trac/wiki-default/TracInterfaceCustomization => TracInterfaceCustomization
 /usr/share/trac/wiki-default/TracReports => TracReports
 /usr/share/trac/wiki-default/TracFastCgi => TracFastCgi
Failed to initialize environment. unhashable type
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/scripts/admin.py", line 623, in do_initenv
    self._do_wiki_load(default_dir('wiki'), cursor)
  File "/usr/lib/python2.3/site-packages/trac/scripts/admin.py", line 813, in _do_wiki_load
    self._do_wiki_import(filename, page, cursor, create_only)
  File "/usr/lib/python2.3/site-packages/trac/scripts/admin.py", line 783, in _do_wiki_import
    cursor, (title, int(time.time()), data, title))
  File "/usr/lib/python2.3/site-packages/trac/scripts/admin.py", line 162, in db_update
    cursor.execute(sql, params)
  File "/usr/lib/python2.3/site-packages/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/usr/lib/python2.3/site-packages/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/usr/lib/python2.3/site-packages/MySQLdb/cursors.py", line 165, in execute
    self._warning_check()
  File "/usr/lib/python2.3/site-packages/MySQLdb/cursors.py", line 80, in _warning_check
    warn(w[-1], self.Warning, 3)
  File "/usr/src/build/394694-i386/install/usr/lib/python2.3/warnings.py", line 57, in warn
    warn_explicit(message, category, filename, lineno, module, registry)
  File "/usr/src/build/394694-i386/install/usr/lib/python2.3/warnings.py", line 75, in warn_explicit
    if registry.get(key):
TypeError: unhashable type

[anonymous]

Python version - 2.3.3

[thatch]

This is not a Trac bug, and has been discussed on the users mailing list. See Fails to initialize project: unhashable type

[cboos]

And one of the possible trigger for the above bug is apparently using a binary collation, like "utf8_bin". As we strongly recommend using "utf8_general_ci" for the collation (see MySqlDb), I think we can close this ticket.