Essentially, Bug#45574 results in this bug. The 'CREATE DATABASE IF NOT EXISTS' statement was not 
binlogged, when the database has existed.
Sometimes, the master and slaves become inconsistent. The "CREATE DATABASE
IF NOT EXISTS mysqltest1" statement is not binlogged
if the db 'mysqltest1' existed before the test case is executed. 
So the db 'mysqltest1' can't be created on slave.
     
Patch of Bug#45574 has resolved this problem. 
But I think it is better to replace 'mysqltest1' by default db 'test'.

myisamchk tool generates warnings when run on an myisam files (.MYI or .MYD)
This is because of the conversion of max_value for certain options in myisamchk 
from singed long to unsigned long

The max value for the options key_buffer_size, read_buffer_size, write_buffer
_size and sort_buffer_size is given as (long) ~0L which becomes -1  when casted
from signed long to longlong and then casted to ulonglong. When (ulonglong) -1 
is compared with maximal value for GET_ULONG data type, we adjust it to 
(ulonglong) ULONG_MAX and throw the warning.

Fixed by using the right max size.

Max values for the variables (from mysqld.cc)
----------------------------
1. key_buffer_size
   5.0: ULONG_MAX
   5.1: SIZE_T_MAX
   6.0: SIZE_T_MAX

2. read_buffer_size and write_buffer_size
   5.0: INT_MAX32
   5.1: INT_MAX32
   6.0: INT_MAX32

3. sort_buffer_size (aka myisam_sort_buffer_size)
   5.0: UINT_MAX32
   5.1: ULONG_MAX
   6.0: ULONG_MAX

Note: testcase not attached

myisam/myisamchk.c:
  Bug#33785 - myisamchk show warning message
      
  Fixed the Max value for key_buffer_size, read_buffer_size, write_buffer_size and
  sort_buffer_size options

                    CREATE TABLE...LIKE...
      
The mysql server option 'sync_frm' is ignored when table is created with 
syntax CREATE TABLE .. LIKE.. 
      
Fixed by adding the MY_SYNC flag and calling my_sync() from my_copy() when
the flag is set.

In mysql_create_table(), when the 'sync_frm' is set, MY_SYNC flag is passed 
to my_copy(). 
      
Note: TestCase is not attached and can be tested manually using debugger.

client/Makefile.am:
  BUG#46591 - .frm file isn't sync'd with sync_frm enabled for 
              CREATE TABLE...LIKE...
      
  add my_sync to sources as it is used in my_copy() method
include/my_sys.h:
  BUG#46591 - .frm file isn't sync'd with sync_frm enabled for 
              CREATE TABLE...LIKE...
      
  MY_SYNC flag is added to call my_sync() method
mysys/my_copy.c:
  BUG#46591 - .frm file isn't sync'd with sync_frm enabled for 
              CREATE TABLE...LIKE...
      
  my_sync() is method is called when MY_SYNC is set in my_copy()
sql/sql_table.cc:
  BUG#46591 - .frm file isn't sync'd with sync_frm enabled for 
              CREATE TABLE...LIKE...
      
  Fixed mysql_create_like_table() to call my_sync() when opt_sync_frm variable
  is set

with the newer pb2 testing environments

This fixes the regression introduced in 5.1 that prevents 64 bit builds on Intel while still keeping the core2 hack operational so the cluster can build.

Remove a self assignment.
Rework a few constructs to avoid a potential overflow.

Based upon patch contributed by Michal Hrusecky

storage/ndb/src/kernel/blocks/dbdict/Dbdict.cpp:
  Remove self assignment, the object is being initialized.
storage/ndb/src/mgmsrv/InitConfigFileParser.cpp:
  Setup the string in a single snprintf.

On 64-bits machines the calculation gets the wrong types and results
in very large numbers. Fixed by explicitly cast month to (int)

Failing to connect would release parts of the MYSQL struct.
We would then proceed to try again to connect without re-
initializing the struct.

We prevent the unwanted freeing of data we'll still need now.


client/mysqladmin.cc:
  Losing a connection (or not even getting on in the first place) should
  not trash the MYSQL-struct.
  
  Add a lot of comments.
  
  Rewrite re-connection fu.
sql-common/client.c:
  Assert against bad parameters usually caused by de-initing a
  MYSQL-struct without re-initing it again before re-use.

Update the test case for BUG#44331 to fix the push build failure.

            results in server crash 
 
check_group_min_max_predicates() assumed the input condition 
item to be one of COND_ITEM, SUBSELECT_ITEM, or FUNC_ITEM. 
Since a condition of the form "field" is also a valid condition 
equivalent to "field <> 0", using such a condition in a query 
where the loose index scan was chosen resulted in a debug 
assertion failure. 
 
Fixed by handling conditions of the FIELD_ITEM type in 
check_group_min_max_predicates(). 

mysql-test/r/group_min_max.result:
  Added a test case for bug #46607.
mysql-test/t/group_min_max.test:
  Added a test case for bug #46607.
sql/opt_range.cc:
  Handle conditions of the FUNC_ITEM type in 
  check_group_mix_max_predicates().

If an EVENT is created without the DEFINER clause set explicitly or with it set  
to CURRENT_USER, the master and slaves become inconsistent. This issue stems from 
the fact that in both cases, the DEFINER is set to the CURRENT_USER of the current 
thread. On the master, the CURRENT_USER is the mysqld's user, while on the slave,  
the CURRENT_USER is empty for the SQL Thread which is responsible for executing 
the statement.

To fix the problem, we do what follows. If the definer is not set explicitly,  
a DEFINER clause is added when writing the query into binlog; if 'CURRENT_USER' is 
used as the DEFINER, it is replaced with the value of the current user before 
writing to binlog.

mysql-test/suite/rpl/r/rpl_create_if_not_exists.result:
  Updated the result file after fixing bug#44331
mysql-test/suite/rpl/r/rpl_drop_if_exists.result:
  Updated the result file after fixing bug#44331
mysql-test/suite/rpl/r/rpl_events.result:
  Test result of Bug#44331
mysql-test/suite/rpl/r/rpl_innodb_mixed_dml.result:
  Updated the result file after fixing bug#44331
mysql-test/suite/rpl/t/rpl_events.test:
  Added test to verify if the definer is consistent between master and slave
  when the event is created without the DEFINER clause set explicitly or the
  DEFINER is set to CURRENT_USER
sql/events.cc:
  The "create_query_string" function is added to create a new query string 
  for removing executable comments.
sql/sql_yacc.yy:
  The remember_name token was added for recording the offset of EVENT_SYM.

mysql-test/r/lock_multi_bug38499.result:
  Update test case result.
mysql-test/r/lock_multi_bug38691.result:
  Update test case result.
mysql-test/t/lock_multi_bug38499.test:
  Do not sync .frm files.
mysql-test/t/lock_multi_bug38691.test:
  Do not sync .frm files.