Team participation page broken on my account

[Stéphane Graber]

Hello,

While cleaning up some team membership following my departure from Canonical, it looks like leaving the ~edubuntu-doc team caused some issues.

https://launchpad.net/~stgraber/+participation returns an OOPS every time whether logged in or not.

e.g. OOPS-bc816d9a20962a81ddda41dc3461e624

    Module lp.registry.browser.person, line 2151, in has_participations
    return len(self.active_participations) > 0
    Module lp.services.propertycache, line 110, in __get__
    value = self.populate(instance)
    Module lp.registry.browser.person, line 2121, in active_participations
    paths, memberships = self.context.getPathsToTeams()
    Module lp.registry.model.person, line 2916, in getPathsToTeams
    step = graph[step]

KeyError: <Person edubuntu-doc (Edubuntu Documentation Team)>

[Stéphane Graber (stgraber)]

Got the page back to working order by leaving another LP team.

[Ines Almeida (ines-almeida)]

This seems like an edge case in the algorithm to fetch all team participations, probably related to the cleaning up memberships.

From a quick look at the code, it seems like it could possibly be due to cache of the property `<person>.teams_participated_in`.