The C optimizer may decide that data access operations
through pointer of different type are not related to 
the original data (strict aliasing).
This is what happens in fetch_long_with_conversion(),
when called as part of mysql_stmt_fetch() : it tries 
to check for truncation errors by first storing float
(and other types of data) into a char * buffer and then 
accesses them through a float pointer.
This is done to prevent the effects of excess precision
when using FPU registers.
However the doublestore() macro converts a double pointer
to an union pointer. This violates the strict aliasing rule.
Fixed by making the intermediary variables volatile (
to not re-introduce the excess precision bug) and using
the intermediary value instead of the char * buffer.
Note that there can be loss of precision for both signed
and unsigned 64 bit integers converted to double and back,
so the check must stay there (even for compatibility 
reasons).
Based on the excellent analysis in bug 28400.

into  mysql.com:/home/hf/work/29117/my50-29117

we use net->vio in my_net_local_init, but in the my_net_init
implementation we set it after the call, so work with unspecified
net->vio value

into  gleb.loc:/home/uchum/work/bk/5.0-opt

into  mysql.com:/home/svoj/devel/mysql/merge/mysql-5.0-engines

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-engines

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug27130

represented by an expression of the type UNSIGNED INT and this 
expression was evaluated to 0 then the function erroneously returned
the value of the first argument instead of an empty string. 

This problem was introduced by the patch for bug 10963.

The problem has been resolved by a proper modification of the code of
Item_func_substr::val_str.

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-engines

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-engines

- correct test and result file

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-engines

  Updated test case for bug #28625.

into  chilla.local:/home/mydev/mysql-5.0-axmrg

into  gleb.loc:/home/uchum/work/bk/5.0-opt-28625

DECIMAL column was used instead of BIGINT for the minimal possible
BIGINT (-9223372036854775808).

The Item_func_neg::fix_length_and_dec has been adjusted to
to inherit the type of the argument in the case when it's an 
Item_int object whose value is equal to LONGLONG_MIN.

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build

  Post-merge fix: replace xid=* with XID to isolate from number of transactions

into  quadxeon.mysql.com:/benchmarks/ext3/TOSAVE/tsmith/bk/maint/jun14/50

into  quadxeon.mysql.com:/benchmarks/ext3/TOSAVE/tsmith/bk/maint/jun14/50

into  chilla.local:/home/mydev/mysql-5.0-axmrg

into  chilla.local:/home/mydev/mysql-5.0-axmrg

into  chilla.local:/home/mydev/mysql-5.0-axmrg

into  chilla.local:/home/mydev/mysql-4.1-axmrg

into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0-maint

mysql-test/include/wait_for_slave_io_to_stop.inc
mysql-test/include/wait_for_slave_sql_to_stop.inc
mysql-test/include/wait_for_slave_to_start.inc
mysql-test/include/wait_for_slave_to_stop.inc
from 5.1

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build-work

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0

  Problem: Temporary buffer which is used for quoting and escaping
  was initialized to character set utf8, and thus didn't allow
  to store data in other character sets.
  Fix: changing character set of the buffer to be able to
  store any arbitrary sequence of bytes.

of its arguments was evaluated to NULL, while the predicate
LOCATE(str,NULL) IS NULL erroneously was evaluated to FALSE.

This happened because the Item_func_locate::fix_length_and_dec
method by mistake set the value of the maybe_null flag for 
the function item to 0. In consequence of this the function 
was considered as the one that could not ever return NULL.

into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0-maint

into  quadxeon.mysql.com:/benchmarks/ext3/TOSAVE/tsmith/bk/maint/jun14/50

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.0-ndb