Trac crashes when trying to export pages containing attachments

[izzy]

I just tried to export a selection of wiki pages from the admin interface. So I selected the pages, transferred them to the "selected pages" block, and hit the "create" button. The result was just an error stack displayed in the browser - but no PDF created. Error stack ends with:

TypeError: sequence item 0: expected string, NoneType found

(complete stack attached).

Configuration issue? Template issue, as the trace suggests (maybe connected to the problem described in #3779)? I used the latest code from SVN with the latest stable code of Trac 0.11 on Ubuntu 8.04.1 (Python 2.5.2, Genshi 0.5.1).

[izzy]

Error Stack

[izzy]

Debug messages from trac log file

[izzy]

I just attached the debug output from the logfile, which pointed me to where the problem may be: It's obviously the attachments it gets a hick-up from. I just selected a bunch of other pages (with no attachments), and they export fine.

[Nickolas Grigoriadis]

I remember running into this issue. does the latest patch in #3493 resolve/change the issue?

It is quite an invasive patch, sorry :/

[izzy]

Nope, it does not - sorry. Still crashes as soon as there's a page with attachments included.

[jan]

Same problem here. It used to work fine when using the tracd daemon. So it looks to me like some sort of apache (xampp) configuration issue. Unfortunately no clue yet.

[Nickolas Grigoriadis]

Izzy, what type of attachments? Did you configure the plugin as to reflect the configuration changes required for patch #3493 to work correctly?

[wikitopdf]
tmp_dir = /tmp/wikitopdf
trac_uri = http://trac.blah.local

Tell me if that makes it work.

[izzy]

Unfortunately I cannot check anymore, as I switched the company meanwhile and do not have access to that environment anymore. I will check as soon as time permits - but it's not that easy at the moment, since in my environment I don't use attachments in wiki pages... But maybe jan can help to figure out, as he seems to have the same problem? Our setup was Trac via mod_python in Apache, and it sounds like that is was jan is using as well.