In fact this crashes in normal (not embedded) run also.
  The problem is in the memory mapping. Handling the ha_myisammrg::extra(MMAP)
  the MERGE engine tries to mmap all the tables it unites.
  Though some can be empty and then in the mi_dynmap_file()
  we call the my_mmap(0). Normally this call returns MAP_FAILED,
  but not on FreeBSD. There it returns like a 'normal' value,
  and after the consequitive munmap systems gets unstable and
  crashes on some system call later.

per-file comments:
  storage/myisam/mi_dynrec.c
Bug #47139      Test "merge" crashes in "embedded" run
    don't try to mmap zero-length area, just return at once.

   The additional patch. That 'loadxml.test' failure was actually about our testing system,
   not the code.
   Firstly we need a new mysqltest command, wich i called 'send_eval'. So the expression
   can be evaluated, then started in a parallel thread. We only have separane 'send' and
   'eval' commands at the moment.
   Then we need to add the waiting code after the 'KILL' to our test, so the thread will be killed
   before the test goes further. The present 'reap' command doesn't handle the killed threads
   well.
      
per-file comments:
  client/mysqltest.cc
Bug#42520      killing load .. infile Assertion failed: ! is_set(), file .\sql_error.cc, line 8
    The 'send_eval' command implemented.

  mysql-test/r/loadxml.result
Bug#42520      killing load .. infile Assertion failed: ! is_set(), file .\sql_error.cc, line 8
   test result updated.

  mysql-test/t/loadxml.test
Bug#42520      killing load .. infile Assertion failed: ! is_set(), file .\sql_error.cc, line 8
   test case added.

BUG#48447, BUG#48161, fixed a regression from fix of BUG#6045, where binary collations can use indexes/partition pruning for cases using equality conditions, however it cannot be used for any other condition like <, >, <=, >=, <>, also added test case for verification of BUG#47774 in this patch

Fixed a use of non-initialised variable, cannot use NULL flags if RANGE == NO_MAX_RANGE or NO_MIN_RANGE, so need to check NULL flags after checking the RANGE isn't NO_MAX_RANGE

bug fixes for my_vsnprintf

this also fixes a crash when plugin_init() uses ER() too early

(mysql-next-mr backport)

from mysql-next-mr-bar

```---------------------------------------------------------
revno: 2599.178.12
revision-id: alik@mysql.com-20080812161845-we7cx9f22yrghob1
committer: Alexander Nozdrin <alik@mysql.com>
branch nick: 6.0-rt-build
timestamp: Tue 2008-08-12 20:18:45 +0400
message:
  Fix memory leak.
```

---------------------------------------------------------

Fixed a few bugs in hex string generation, in call to val_str for partition expressions, also made code reusable for DEFAULT handling to fix BUG#48464 by introducing function get_cs_converted_string_value, added partition_utf8 test case for UTF8 outputs

(instead of a C++ only thingy that was lost in a merge)

Fixed such that we fail if using integer constants for character set fields, now need to have correct constant types

Fixed so that character set constants are encoded as hex strings in frm file, but as utf8 strings in the same manner as default values in show create table and information schema tables

  function/ syntax
  glob(7) wildcards
  unit tests

Backport for 5.5

In non debug builds, the statements:
- SHOW PROCEDURE CODE
- SHOW FUNCTION CODE
used to fail with a "syntax error", which is misleading.

These statements have been changed to return the following error for non
debug builds:
ERROR HY000: The 'SHOW PROCEDURE|FUNCTION CODE' feature is disabled; you
need MySQL built with '--with-debug' to have it working

For debug builds (./configure --with-debug), nothing is changed.

Backport for 5.5

Backport to 5.5

BUG#48397, set key_part->length to key_part->store_length isn't correct, store_length is a bit longer

      
When the query cache is disabled, the server shouldn't attempt to take the 
query cache mutex.
                             
By using the command line option --query_cache_type=0, the user can disable
   
(backport from mysql-pe)