Comment 1 for bug 688866

log message

101210 23:18:34 Percona XtraDB (http://www.percona.com) 1.1.3-12.1 started; log sequence number 62258015514
101210 23:18:34 [Note] libexec/mysqld: ready for connections.
Version: '5.5.7-rc' socket: '/tmp/mysql.sock' port: 3306 Source distribution
101210 23:19:57 - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help diagnose
the problem, but since we have already crashed, something is definitely wrong
and this may fail.

key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=18
max_threads=3000
thread_count=18
connection_count=18
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 6570973 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

thd: 0x7f65080bd9b0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x413b3108 thread_stack 0x40000
libexec/mysqld(my_print_stacktrace+0x2e)[0x87218e]
libexec/mysqld(handle_segfault+0x341)[0x597e61]
/lib64/libpthread.so.0[0x300b40eb10]
libexec/mysqld[0x7db668]
libexec/mysqld[0x7c1642]
libexec/mysqld[0x783d83]
libexec/mysqld[0x78f758]
libexec/mysqld[0x77c181]
libexec/mysqld[0x72daf7]
libexec/mysqld(_ZN7handler13ha_update_rowEPKhPh+0x64)[0x68c9c4]
libexec/mysqld(_Z12mysql_updateP3THDP10TABLE_LISTR4ListI4ItemES6_PS4_jP8st_orderm15enum_duplicatesbPmSB_+0xf21)[0x631d81]
libexec/mysqld(_Z21mysql_execute_commandP3THD+0x1c51)[0x5a4481]
libexec/mysqld(_ZN18Prepared_statement7executeEP6Stringb+0x3d0)[0x628d20]
libexec/mysqld(_ZN18Prepared_statement12execute_loopEP6StringbPhS2_+0x6f)[0x629a3f]
libexec/mysqld(_Z19mysqld_stmt_executeP3THDPcj+0xdf)[0x629cdf]
libexec/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x8d2)[0x5a8cf2]
libexec/mysqld(_Z10do_commandP3THD+0xc2)[0x5a95d2]
libexec/mysqld(_Z24do_handle_one_connectionP3THD+0x154)[0x59cb64]
libexec/mysqld(handle_one_connection+0x9)[0x59cc09]
/lib64/libpthread.so.0[0x300b40673d]
/lib64/libc.so.6(clone+0x6d)[0x300acd3d1d]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort...
thd->query at 0x1ab9bc48 = UPDATE sbtest_1 SET some_id= ? WHERE id = ?
thd->thread_id=18
thd->killed=NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.