Fix bug: if we dropped a table where an INSERT was waiting for a lock to check a FOREIGN KEY constraint, then an assertion would fail in lock_reset_all_on_table(), since that operation assumes no waiting locks on the table or its records
row0mysql.c:
  Fix bug: InnoDB failed to drop a table in the background drop queue if the table was referenced by a foreign key constraint


innobase/row/row0mysql.c:
  Fix bug: InnoDB failed to drop a table in the background drop queue if the table was referenced by a foreign key constraint
innobase/row/row0ins.c:
  Fix bug: if we dropped a table where an INSERT was waiting for a lock to check a FOREIGN KEY constraint, then an assertion would fail in lock_reset_all_on_table(), since that operation assumes no waiting locks on the table or its records