42896f9f90442ecb53789769206de62beeab720e removed the PhabricatorProfilePanel symbol and also the associated file "PhabricatorProfilePanel.php". However, searching for "PhabricatorProfilePanel" does not not bring up this commit. Instead the search result contains only two items: The deleted documentation, without a hint on what replaced this class, and T10308, which is unrelated to the removal.
I would expect the search to also find things based on the contents of commits (i.e. at least least affected filenames, but actually even the changed text itself).
This was observed on https://secure.phabricator.com/ as of today, 2017-01-03 around 12:00 UTC.