memcached crash in flusher.cc:190

memcached core dump on testing in large cluster (20 nodes) with constant load in setting data and running rebalance/failover tests

Thread 1 (Thread 18657):
#0 0xb774d430 in __kernel_vsyscall ()
#1 0xb759c4d1 in raise () from /lib/tls/i686/cmov/libc.so.6
#2 0xb759f932 in abort () from /lib/tls/i686/cmov/libc.so.6
#3 0xb7595648 in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#4 0xb3c93736 in Flusher::step (this=0xae74ba0, d=..., tid=...) at flusher.cc:190
#5 0xb3c942db in FlusherStepper::callback (this=0xb1900900, d=..., t=...) at flusher.cc:23
#6 0xb3c55b79 in Task::run (this=0xb1900928, d=..., t=...) at dispatcher.hh:139
#7 0xb3c545a0 in Dispatcher::run (this=0xa1f94b8) at dispatcher.cc:119
#8 0xb3c55395 in launch_dispatcher_thread (arg=0xa1f94b8) at dispatcher.cc:28
#9 0xb76bc80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#10 0xb763ea0e in clone () from /lib/tls/i686/cmov/libc.so.6

you can access the core.memcached in 10.1.5.31
look for the core file core.memcached.18635 under /tmp or /tmp/backup