Summary:
Ref T9028. When users push a commit, then later delete it (e.g., by deleting the branch which contained it) we currently explode when trying to view it.
Instead, degrade gradually if some information is not available.
Test Plan:
- Looked at valid commits with parents, refs, branches and merges.
- Looked at invalid commits.
- Looked at a previously valid, now-deleted + gc'd commit:
{F859273}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T9028
Differential Revision: https://secure.phabricator.com/D14227
0db86cce7d