Commits

Mark Lacey committed c270f76db11
Fix check related to null conformances. Verify that existentials have null conformances, just as is required of archetypes, and require non-null conformances in other cases. The last require that we had here attempted to allow for null conformances, but we check just above that the conformance is non-null, and this was firing on existentials with some other changes that I have. Swift SVN r23200