LP:976104 - Assertion `0' failed in my_message_sql on UPDATE IGNORE, or unknown error on release build

#8 0xb7448014 in __assert_fail () from /lib/libc.so.6

#9 0x082d0fed in my_message_sql (error=1105, str=0xae8c0444 "Unknown error",

    MyFlags=0) at mysqld.cc:3008

#10 0x087c9236 in my_error (nr=1105, MyFlags=0) at my_error.c:102

#11 0x083af0f2 in multi_update::send_error (this=0x948cb30, errcode=1105,

    err=0x934c280 "Unknown error") at sql_update.cc:1897

#12 0x083ad429 in mysql_multi_update (thd=0x93ec740, table_list=0x948b7a0,

    fields=0x93ee248, values=0x93ee4b0, conds=0x948ca20, options=0,

    handle_duplicates=DUP_ERROR, ignore=true, unit=0x93edec0,

    select_lex=0x93ee1b4) at sql_update.cc:1298

#13 0x082e59e5 in mysql_execute_command (thd=0x93ec740) at sql_parse.cc:3179

#14 0x082ee50c in mysql_parse (thd=0x93ec740,

    rawbuf=0x948b680 "UPDATE IGNORE t1, t2 SET b = 'bar', c = 'bar' \nWHERE a != ( SELECT 1 UNION SELECT 2 )", length=85, found_semicolon=0xae8c1234)

    at sql_parse.cc:6152

#15 0x082e0eed in dispatch_command (command=COM_QUERY, thd=0x93ec740,

    packet=0x94442a9 "UPDATE IGNORE t1, t2 SET b = 'bar', c = 'bar' \nWHERE a != ( SELECT 1 UNION SELECT 2 )", packet_length=85) at sql_parse.cc:1228

#16 0x082e0397 in do_command (thd=0x93ec740) at sql_parse.cc:923

#17 0x082dd28d in handle_one_connection (arg=0x93ec740) at sql_connect.cc:1218

#18 0xb76d6b25 in start_thread () from /lib/libpthread.so.0

CREATE TABLE t1 ( a INT, b CHAR(3) );

INSERT INTO t1 VALUES ( 1, 'foo' );

CREATE TABLE t2 ( c CHAR(3), d INT );

INSERT INTO t2 VALUES ( 'foo', 1 );

UPDATE IGNORE t1, t2 SET b = 'bar', c = 'bar'

  WHERE a != ( SELECT 1 UNION SELECT 2 );