with seg fault

Multiple-table DELETE from a table joined to itself may cause
server crash. This was originally discovered with MEMORY engine,
but may affect other engines with different symptoms.

The problem was that the server violated SE API by performing
parallel table scan in one handler and removing records in
another (delete on the fly optimization).


mysql-test/r/heap_btree.result:
  Updated test result after adding new test for this bug.
mysql-test/t/heap_btree.test:
  Updated test result after adding new test for the bug report.
sql/sql_delete.cc:
  Updated to check if the files in delete list appears in join list and disable 
  delete while scanning, if it appears.