Infinite recursion upon rendering repository files

[strk@…]

After upgrading from 1.0 to 1.2 (r15395), attempts to read *any* file from the Browse Source tree result in an infinite recursion, eventually handled by a Maximum recursion depth exceeded while calling a Python object error.

The backtrace:

...
  File "/usr/local/lib/python2.6/dist-packages/Trac-1.2.1dev-py2.6.egg/trac/util/__init__.py", line 1197, in __get__
    result = self.fn(instance)
  File "/usr/local/lib/python2.6/dist-packages/Trac-1.2.1dev-py2.6.egg/trac/mimeview/pygments.py", line 241, in _types
    js_entry = self._types.get('text/javascript')
  File "/usr/local/lib/python2.6/dist-packages/Trac-1.2.1dev-py2.6.egg/trac/util/__init__.py", line 1197, in __get__
    result = self.fn(instance)
  File "/usr/local/lib/python2.6/dist-packages/Trac-1.2.1dev-py2.6.egg/trac/mimeview/pygments.py", line 241, in _types
    js_entry = self._types.get('text/javascript')
...

I've also reported this on the user list: ​https://groups.google.com/forum/#!topic/trac-users/yaMesS3G6uo