it's possible to ask answer even if answers is not enabled for a project

[Alexander Belchenko]

If some project has not enabled answers then user still can ask questions clicking on Bugs tab and then use right panel links:
Report a bug
Ask a question

Clicking on Ask a question will open the corresponding form and one can enter the question. I've filed question https://answers.launchpad.net/bzr-tiplog/+question/172456 in such way and even got mail notification, but there is no way to find this question via Answers tab, Launchpad says:
Launchpad does not know where bzr-tiplog tracks support requests.

[Curtis Hovey (sinzui)]

The defect is in BugTaskSearchListingView.addquestion_url which wrongly checks if there is a URL for asking a question. The object type is checked if it is a valid question target, but there is not check if the project uses Lp answers. The correct test is:
    @property
    def addquestion_url(self):
        """Return the URL for the +addquestion view for the context."""
        if IQuestionTarget.providedBy(self.context):
            answers_usage = IServiceUsage(self.context).answers_usage
            if answers_usage == ServiceUsage.LAUNCHPAD:):
                return canonical_url(
                    self.context, rootsite='answers',
                    view_name='+addquestion')
        else:
            return None

[Launchpad QA Bot (lpqabot)]

Fixed in stable r14074 <http://bazaar.launchpad.net/~launchpad-pqm/launchpad/stable/revision/14074>.