my_error() was invoked in reset_slave()'s with purge_relay_logs()-failing branch
without passing sql_errno to it.

Fixed with setting sql_errno= ER_RELAY_LOG_FAIL in the purge_relay_logs()-failing branch.

into actual tree

                                    table corruption


Moved the testcase from the file myisam.test to the new testfile 
mysiam_debug.test
 

This is a "null" merge because the fix is
already in 5.1

Error happens because sp_head::MULTI_RESULTS is not set for SP
which has 'show table status' command.
The fix is to add a SQLCOM_SHOW_TABLE_STATUS case into
sp_get_flags_for_command() func.

per-file comments:
  tests/mysql_client_test.c
the test for bug 37956 isn't relevant anymore.
The query there 'select point(?,?)' doesn't produce an error.

                       
Killing the insert-select statement corrupts the MyISAM table only
when the destination table is empty and when it has indexes. When 
we bulk insert huge data and if the destination table is empty we 
disable the indexes for fast inserts, data is then inserted and 
indexes are re-enabled after bulk_insert operation
                        
Killing the query, aborts the repair table operation during enable
indexes phase leading to table corruption.
                      
We now truncate the table when we detect that enable indexes is
killed for bulk insert query.As we have an empty table before the 
operation, we can fix by truncating the table.

      
A bug in the initialization of key segment information made it point
to the wrong bit, since a bit index was used when its int value
was needed. This lead to misinterpretation of bit columns
read from MyISAM record format when a NULL bit pushed them over
a byte boundary.
Fixed by using the int value of the bit instead.

key_buffer_size.

The cause of corruption was number overflow when multiplying 
two ulong values, number of used keycache blocks with size
of a single block. The result of multiplication exceeded ulong 
range (4G) and this lead to incorrectly calculated  buffer offset
in the key cache.

The fix is to use size_t for multiplication result.

This patch also fixes pointless cast in safemalloc 
(size of allocated block to uint), that creates lot of false
alarm warnings when using big keycache (> 4GB) in debug mode.

The storage engine was not correctly handling the case in 
which rnd_pos is executed for a handler without a preceding
rnd_next or index read operation. As a result, an unitialized
file handle was sometimes being passed to the QMY_READ API.

The fix clears the rrnAssocHandle at the beginning of each
read operation and then checks to see whether it has been
set to a valid handle value before attempting to use it
in rnd_pos. If rrnAssocHandle has not been set by a previous
read operation, rnd_pos instead falls back to the use of the
currently active handle.

no conflicts

no conflicts

      Several 5.0 tests do not pass MTR's --check option (moved from Bug 42308)

                  (moved from Bug 42308)

Details:
- insert_update
  Add DROP TABLE which was missing, error numbers -> names
- varbinary
  Add DROP TABLE which was missing
- sp_trans_log
  Add missing DROP function, improved formatting

      
Fixed a number of typos, and made punctuation and
capitalization more consistent in documentation
and help.

The issue of the current bug is unguarded access to mi->slave_running 
by the shutdown thread calling end_slave() that is bug#29968 
(alas happened not to be cross-linked with the current bug)

Fixed:

with removing the unguarded read of the running status
and perform reading it in terminate_slave_thread()
at time run_lock is taken (mostly bug#29968 backporting, still with some
improvements over that patch - see the error reporting from 
terminate_slave_thread()).
Issue of bug#38716 is fixed here for 5.0 branch as well.

Note:

There has been a separate artifact identified - 
a race condition between init_slave() and  end_slave() - 
reported as  Bug#44467.

   the Point() and Linestring() functions create WKB representation of an
   object instead of an real geometry object.
   That produced bugs when these were inserted into tables.

   GIS tests fixed accordingly.
            
per-file messages:
  mysql-test/r/gis-rtree.result
Bug#38990 Arbitrary data input plus GIS functions causes mysql server crash 
    test result
  mysql-test/r/gis.result
Bug#38990 Arbitrary data input plus GIS functions causes mysql server crash 
    test result
  mysql-test/t/gis-rtree.test
Bug#38990 Arbitrary data input plus GIS functions causes mysql server crash 
    test fixed - GeomFromWKB invocations removed
  mysql-test/t/gis.test
Bug#38990 Arbitrary data input plus GIS functions causes mysql server crash 
    test fixed - AsWKB invocations added
  sql/item_geofunc.cc
Bug#38990 Arbitrary data input plus GIS functions causes mysql server crash 
     Point() and similar functions to create a proper object

Bug #40925: Equality propagation takes non indexed attribute

Query execution plans and execution time of queries like

  select a, b, c from t1
    where a > '2008-11-21' and b = a limit 10

depended on the order of equality operator parameters:
"b = a" and "a = b" are not same. 


An equality propagation algorithm has been fixed:
the substitute_for_best_equal_field function should not
substitute a field for an equal field if both fields belong
to the same table.

The fix is to disable result log as we need to
test valgrind error only.

Respectively, replaced "--exec diff" by "--diff_files" which is a mysqltest command to run a
non-operating system specific diff. Removed the file rpl_000015-slave.sh as it is not
necessary in the new MTR.

Turned off autocommit at the start of this test per Innobase recommendation.
Noted significant reduction in run time for this test w/ a minor increase in other tests' run-times.