trac internal error: ('Unable to open root of edit', 220000)

[aschultz@…]

After upgrading from 0.8 to svn snapshot 1197 i get an internal error when trying to view a changeset. The full trace is:

Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/core.py", line 533, in cgi_start
    real_cgi_start()
  File "/usr/lib/python2.3/site-packages/trac/core.py", line 528, in real_cgi_start
    dispatch_request(path_info, args, req, env)
  File "/usr/lib/python2.3/site-packages/trac/core.py", line 443, in dispatch_request
    module.run()
  File "/usr/lib/python2.3/site-packages/trac/Module.py", line 45, in run
    disp()
  File "/usr/lib/python2.3/site-packages/trac/Changeset.py", line 445, in display
    self.render_diffs()
  File "/usr/lib/python2.3/site-packages/trac/Changeset.py", line 441, in render_diffs
    0, 1, 0, 1, self.pool)
SubversionException: ('Unable to open root of edit', 220000)

[aschultz@…]

found the cruelprint. I've added authz directives to my trac.ini like this:

authz_file = /etc/subversion/dav_svn.authz
authz_module_name = test

But my dav_svn.authz did only contain a line like:

[/]
* = rw

Chaning this to:

[test:/]
* = rw

make the problem go away.

So the problem is that the authz module is unable to match the generic / rule to the module specific rule.

I'm not sure if this behaivior is desired, but the error message should at least clearly indicate that i don't have permissions to access this changeset instead of the cryptic error message one gets at the moment.

[Christopher Lenz]

Matt, can you check whether this is still true with the improved authz support?

[Matthew Good]

Yeah, this was fixed with [1450] as well. The test suite​ includes checks for this scenario in the "Module Usage" section.