Comment 1 for bug 791004

(gdb) bt
#0 0x0000003fccc0bd02 in pthread_kill () from /lib64/libpthread.so.0
#1 0x00000000008c8393 in my_write_core (sig=6) at /mnt/x25m/gval/r3483/mysys/stacktrace.c:423
#2 0x00000000005395a7 in handle_segfault (sig=6) at /mnt/x25m/gval/r3483/sql/mysqld.cc:2546
#3 <signal handler called>
#4 0x0000003fcc430265 in raise () from /lib64/libc.so.6
#5 0x0000003fcc431d10 in abort () from /lib64/libc.so.6
#6 0x0000003fcc4296e6 in __assert_fail () from /lib64/libc.so.6
#7 0x0000000000b7e1f8 in event_del (ev=0x2aaab4007b10) at /mnt/x25m/gval/r3483/extra/libevent/event.c:771
#8 0x0000000000b7e6f0 in timeout_process (base=0x1a5662a0) at /mnt/x25m/gval/r3483/extra/libevent/event.c:896
#9 0x0000000000b7d969 in event_base_loop (base=0x1a5662a0, flags=1) at /mnt/x25m/gval/r3483/extra/libevent/event.c:506
#10 0x0000000000b7d7fc in event_loop (flags=1) at /mnt/x25m/gval/r3483/extra/libevent/event.c:443
#11 0x00000000006afeed in libevent_thread_proc (arg=0x0) at /mnt/x25m/gval/r3483/sql/scheduler.cc:592
#12 0x0000003fccc0673d in start_thread () from /lib64/libpthread.so.0
#13 0x0000003fcc4d3f6d in clone () from /lib64/libc.so.6