Fixes T11853. To set this up:
- Create "Project A".
- Join "Project A".
- Create a subproject, "Project A Subproject 1".
- This causes Project A to become a parent project.
- This moves you to be a member of "Project A Subproject 1" instead of "Project A" directly.
- Create another subproject, "Project A Subproject 2".
- Do not join this subproject.
- Set the second subproject's policy to "Visible To: Members of Project A".
- Try to edit the second subproject.
Before this change, this fails:
- When querying projects, we sometime try to skip loading the viewer's membership in ancestor projects as a small optimization.
- Via PhabricatorExtendedPolicyInterface, we may then return the parent project to the policy filter for extended checks.
- The PolicyFilter has an optimization: if we're checking an object, and we already have that object, we can just use the object we already have. This is common and useful.
- However, in this case it causes us to reuse an incomplete object (an object without proper membership information). We fail a policy check which we should pass.
Instead, don't skip loading the viewer's membership in ancestor projects.