AttributeError: 'NoneType' object has no attribute 'rev'

[ismael@…]

How to Reproduce

While doing a GET operation on /changeset/4822, Trac issued an internal error.

This is very strange:

• ​http://www.initng.org/changeset/4822

But this is even more:

• ​http://www.initng.org/changeset/4822/initng-ifiles/trunk/initfiles/

The svn log

------------------------------------------------------------------------
r4822 | ismael | 2007-02-18 17:26:41 -0200 (Sun, 18 Feb 2007) | 3 lines
Changed paths:
   M /initng-ifiles/trunk/initfiles/daemon/esound.ii
   M /initng-ifiles/trunk/initfiles/daemon/gdm.ii
   M /initng-ifiles/trunk/initfiles/daemon/instant-gdm.ii
   M /initng-ifiles/trunk/initfiles/daemon/jackd.ii
   M /initng-ifiles/trunk/initfiles/daemon/kdm.ii
   M /initng-ifiles/trunk/initfiles/daemon/mpd.ii
   M /initng-ifiles/trunk/initfiles/daemon/pbbuttonsd.ii
   M /initng-ifiles/trunk/initfiles/daemon/slmodemd.ii
   M /initng-ifiles/trunk/initfiles/daemon/timidity.ii
   M /initng-ifiles/trunk/initfiles/daemon/xdm.ii
   D /initng-ifiles/trunk/initfiles/system/alsasound.ii
   D /initng-ifiles/trunk/initfiles/system/exportfs.ii
   D /initng-ifiles/trunk/initfiles/system/faketty.ii
   D /initng-ifiles/trunk/initfiles/system/fbsplash.ii
   D /initng-ifiles/trunk/initfiles/system/firestarter.ii
   D /initng-ifiles/trunk/initfiles/system/guarddog.ii
   D /initng-ifiles/trunk/initfiles/system/iptables.ii
   D /initng-ifiles/trunk/initfiles/system/laptop-mode.ii
   D /initng-ifiles/trunk/initfiles/system/lm-sensors.ii
   D /initng-ifiles/trunk/initfiles/system/local.ii
   D /initng-ifiles/trunk/initfiles/system/nfs.ii
   D /initng-ifiles/trunk/initfiles/system/splashy.ii

 * Moved iptables, faketty, alsasound, firestarter, guarddog, fbsplash,
   lm-sensors, splashy, local, laptop-mode, nfs, and exportfs to service/

------------------------------------------------------------------------

Request parameters:

{'new': u'4822'}

System Information

Trac	0.11dev
Python	2.4.4 (#2, Jan 13 2007, 17:50:26) [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)]
SQLite	2.8.17
pysqlite	1.0.1
Genshi	0.4dev-r494
Pygments	0.7dev-r2733
Subversion	1.4.2
SilverCity	?

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 401, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 213, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/web_ui/changeset.py", line 308, in process_request
    self._render_html(req, repos, chgset, restricted, xhr, data)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/web_ui/changeset.py", line 563, in _render_html
    href = req.href.changeset(new_node.rev, new_node.path)
AttributeError: 'NoneType' object has no attribute 'rev'

[Christian Boos]

Thanks ismael, so it appears you have SQLite.

I think it would help to get the output of the following command:

sqlite $TRAC_ENV/db/trac.db 'select * from node_change where rev=4822'

[anonymous]

Here's the output of sqlite trac.db 'select * from node_change where rev=4822':

4822|initng-ifiles/trunk/initfiles/daemon/esound.ii|F|E|initng-ifiles/trunk/initfiles/daemon/esound.ii|4547
4822|initng-ifiles/trunk/initfiles/daemon/gdm.ii|F|E|initng-ifiles/trunk/initfiles/daemon/gdm.ii|4547
4822|initng-ifiles/trunk/initfiles/daemon/instant-gdm.ii|F|E|initng-ifiles/trunk/initfiles/daemon/instant-gdm.ii|4547
4822|initng-ifiles/trunk/initfiles/daemon/jackd.ii|F|E|initng-ifiles/trunk/initfiles/daemon/jackd.ii|4547
4822|initng-ifiles/trunk/initfiles/daemon/kdm.ii|F|E|initng-ifiles/trunk/initfiles/daemon/kdm.ii|4547
4822|initng-ifiles/trunk/initfiles/daemon/mpd.ii|F|E|initng-ifiles/trunk/initfiles/daemon/mpd.ii|4547
4822|initng-ifiles/trunk/initfiles/daemon/pbbuttonsd.ii|F|E|initng-ifiles/trunk/initfiles/daemon/pbbuttonsd.ii|4771
4822|initng-ifiles/trunk/initfiles/daemon/slmodemd.ii|F|E|initng-ifiles/trunk/initfiles/daemon/slmodemd.ii|4547
4822|initng-ifiles/trunk/initfiles/daemon/timidity.ii|F|E|initng-ifiles/trunk/initfiles/daemon/timidity.ii|4560
4822|initng-ifiles/trunk/initfiles/daemon/xdm.ii|F|E|initng-ifiles/trunk/initfiles/daemon/xdm.ii|4560
4822|initng-ifiles/trunk/initfiles/system/alsasound.ii|F|D|initng-ifiles/trunk/initfiles/system/alsasound.ii|4821
4822|initng-ifiles/trunk/initfiles/system/exportfs.ii|F|D|initng-ifiles/trunk/initfiles/system/exportfs.ii|4821
4822|initng-ifiles/trunk/initfiles/system/faketty.ii|F|D|initng-ifiles/trunk/initfiles/system/faketty.ii|4821
4822|initng-ifiles/trunk/initfiles/system/fbsplash.ii|F|D|initng-ifiles/trunk/initfiles/system/fbsplash.ii|4821
4822|initng-ifiles/trunk/initfiles/system/firestarter.ii|F|D|initng-ifiles/trunk/initfiles/system/firestarter.ii|4821
4822|initng-ifiles/trunk/initfiles/system/guarddog.ii|F|D|initng-ifiles/trunk/initfiles/system/guarddog.ii|4821
4822|initng-ifiles/trunk/initfiles/system/iptables.ii|F|D|initng-ifiles/trunk/initfiles/system/iptables.ii|4821
4822|initng-ifiles/trunk/initfiles/system/laptop-mode.ii|F|D|initng-ifiles/trunk/initfiles/system/laptop-mode.ii|4821
4822|initng-ifiles/trunk/initfiles/system/lm-sensors.ii|F|D|initng-ifiles/trunk/initfiles/system/lm-sensors.ii|4821
4822|initng-ifiles/trunk/initfiles/system/local.ii|F|D|initng-ifiles/trunk/initfiles/system/local.ii|4821
4822|initng-ifiles/trunk/initfiles/system/nfs.ii|F|D|initng-ifiles/trunk/initfiles/system/nfs.ii|4821
4822|initng-ifiles/trunk/initfiles/system/splashy.ii|F|D|initng-ifiles/trunk/initfiles/system/splashy.ii|4821

[Christian Boos]

Damn, that's exactly what it was supposed to be, so the error is not in the resync code. Thanks a lot for the feedback, I still need to find the time to reproduce this locally.

[Christian Boos]

Hm, just went there … it works now!

I think I forgot to ask you the obvious question: what revision of Trac were you using? … and that must have been something between r4682 and r4687 (excluded).

My bad and sorry for the noise!

[Christian Boos]

Ah, ​http://www.initng.org/changeset/4822/initng-ifiles/trunk/initfiles/ is still problematic, so maybe there's still something to fix!

[Christian Boos]

Ok, there was a bug after all :-) Fixed in r4815.