Comment 2 for bug 791163

mysqld.1
(gdb) bt
#0 0x0000003fccc0bd02 in pthread_kill () from /lib64/libpthread.so.0
#1 0x00000000008c853f in my_write_core (sig=6) at /mnt/x25m/gval/r3487/mysys/stacktrace.c:423
#2 0x00000000005395a7 in handle_segfault (sig=6) at /mnt/x25m/gval/r3487/sql/mysqld.cc:2546
#3 <signal handler called>
#4 0x0000003fcc4cb186 in poll () from /lib64/libc.so.6
#5 0x0000000000539f1f in handle_connections_sockets () at /mnt/x25m/gval/r3487/sql/mysqld.cc:5198
#6 0x000000000053e936 in mysqld_main (argc=49, argv=0xe89fa80) at /mnt/x25m/gval/r3487/sql/mysqld.cc:4638
#7 0x0000000000533383 in main (argc=10, argv=0x7fff0e1a2588) at /mnt/x25m/gval/r3487/sql/main.cc:24

mysqld.2
(gdb) bt
#0 0x0000003fccc0bd02 in pthread_kill () from /lib64/libpthread.so.0
#1 0x00000000008c853f in my_write_core (sig=6) at /mnt/x25m/gval/r3487/mysys/stacktrace.c:423
#2 0x00000000005395a7 in handle_segfault (sig=6) at /mnt/x25m/gval/r3487/sql/mysqld.cc:2546
#3 <signal handler called>
#4 0x0000003fcc4cb186 in poll () from /lib64/libc.so.6
#5 0x0000000000539f1f in handle_connections_sockets () at /mnt/x25m/gval/r3487/sql/mysqld.cc:5198
#6 0x000000000053e936 in mysqld_main (argc=58, argv=0x2d34b50) at /mnt/x25m/gval/r3487/sql/mysqld.cc:4638
#7 0x0000000000533383 in main (argc=10, argv=0x7fff23e45838) at /mnt/x25m/gval/r3487/sql/main.cc:24