Comment 7 for bug 372752

I don't know why it isn't always reproducible, but from looking at the code it should still happen:

* plugins/rst still depends on docutils

* The directory plugins is iterated in IkiWiki::listplugins()

* IkiWiki::listplugins() is called in IkiWiki::Setup::getsetup() which tries to load all available plugins via IkiWiki::Plugin::external

That's where I stopped looking. Maybe it depends on the local python config if the errors are suppressed or not.