/usr/lib/unity-lens-photos/unity-lens-photos:TypeError:<module>:__init__:__init__:_get_accounts_for_service:constructor

I think this bug is in libaccounts-glib:libaccounts-glib/ag-manager.c:
static GObject *
ag_manager_constructor (GType type, guint n_params,
                        GObjectConstructParam *params)
{
    GObjectClass *object_class = (GObjectClass *)ag_manager_parent_class;
    AgManager *manager;
    GObject *object;

    object = object_class->constructor (type, n_params, params);

    g_return_val_if_fail (object != NULL, NULL);

    manager = AG_MANAGER (object);
    if (G_UNLIKELY (!open_db (manager) || !setup_dbus (manager)))
    {
        g_object_unref (object);
        return NULL;
    }

    return object;
}

i.e. the database has failed to open or dbus not worked.

Trace from errors.ubuntu.com:

Traceback (most recent call last):
  File "/usr/lib/unity-lens-photos/unity-lens-photos", line 162, in <module>
    daemon = Daemon()
  File "/usr/lib/unity-lens-photos/unity-lens-photos", line 98, in __init__
    flickr (self._lens)
  File "/usr/lib/unity-lens-photos/flickr_scope.py", line 60, in __init__
    self._get_accounts_for_service ('flickr')
  File "/usr/lib/unity-lens-photos/flickr_scope.py", line 97, in _get_accounts_for_service
    self._account_manager = Accounts.Manager.new_for_service_type("sharing")
  File "/usr/lib/python3/dist-packages/gi/types.py", line 76, in constructor
    return info.invoke(cls, *args, **kwargs)
TypeError: constructor returned NULL

Yeah this is the same as the other one. I don't think it's a bug in libaccounts-glib; we just need to handle it.

there is an easy test case that I know of:

laney@raleigh> chmod a-r ~/.config/libaccounts-glib/accounts.db
laney@raleigh> killall unity-lens-photos; ./unity-lens-photos

crashes if bad, errors but doesn't crash if good

Hello Evan, or anyone else affected,

Accepted unity-lens-photos into quantal-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/unity-lens-photos/0.9-0ubuntu1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please change the bug tag from verification-needed to verification-done. If it does not, change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

I've been running the fixed version for some time now and now from the -proposed, now regressions (or crashes) observed.

The verification of this Stable Release Update has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.

This bug was fixed in the package unity-lens-photos - 0.9-0ubuntu1

---------------
unity-lens-photos (0.9-0ubuntu1) quantal-proposed; urgency=low

  * New upstream release.
    - [SRU] Default lenses results should appear above the shopping category
      (LP: #1066957)
    - TypeError:<module>:__init__:__init__:_get_accounts_for_service:constructor
      (LP: #1058061)
    - geeqie-standard crashes on start with SIGSEGV in editor_command_parse()
      when unity-lens-photos is installed (LP: #1056532)
 -- Lukasz 'sil2100' Zemczak <email address hidden> Fri, 19 Oct 2012 10:09:51 +0200

Removing libaccounts-glib from this released bug report.