- Make THD::raise_condition() call push_warning() after set_error_status() call.
  (they seem to have accidentally exchanged in this merge cset:
   sergii@pisem.net-20130721143919-7cltcw2l9g29f983)
- Rollback the patch from two csets before (the one with comment:
   Update filesort_debug.test (see comment #1 in MDEV-4786 for analysis))