It shows a regression in the test-suite. However, it can't be replicated in mainline. I won't be tagging the release candidate 2 today as scheduled because I would first like to understand what the error here is. If you have a Linux machine and can help out, please do. It may involve performing a bisect of mainline between the release revision (~r127210) and ToT.
As a side note, please make sure that all patches which should be merged into the 2.9 branch are indeed there. I.e., make sure that I got the emails and did my job. :-) If the code owners haven't yet looked at the patches, please ping them to do so.
This is only a small delay and shouldn't affect the projected release date.