CouchKVStore::listPersistedVbuckets() abort instead returning an error

Thread 12 (Thread 0x2b2eef14d220 (LWP 968)):
#0 0x000000346e8d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b2eeecc9bc6 in ?? () from /opt/couchbase/lib/libevent-2.0.so.5
#2 0x00002b2eeecb8c11 in event_base_loop () from /opt/couchbase/lib/libevent-2.0.so.5
#3 0x00000000004092f6 in pthread_attr_setdetachstate ()
#4 0x000000346e81d994 in __libc_start_main () from /lib64/libc.so.6
#5 0x0000000000402969 in pthread_attr_setdetachstate ()
#6 0x00007fffc9e9eca8 in ?? ()
#7 0x0000000000000000 in ?? ()

Thread 11 (Thread 969):
#0 0x000000346e8c678b in read () from /lib64/libc.so.6
#1 0x000000346e86cd57 in _IO_new_file_underflow () from /lib64/libc.so.6
#2 0x000000346e86d71e in _IO_default_uflow_internal () from /lib64/libc.so.6
#3 0x000000346e868fdb in getc () from /lib64/libc.so.6
#4 0x00002b2eef14e879 in ?? () from /opt/couchbase/lib/memcached/stdin_term_handler.so
#5 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#6 0x000000346e8d44bd in clone () from /lib64/libc.so.6

Thread 10 (Thread 970):
#0 0x000000346e89a541 in nanosleep () from /lib64/libc.so.6
#1 0x000000346e89a364 in sleep () from /lib64/libc.so.6
#2 0x00000000004157b8 in pthread_attr_setdetachstate ()
#3 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#4 0x000000346e8d44bd in clone () from /lib64/libc.so.6

Thread 9 (Thread 971):
#0 0x000000346f40aee9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1 0x00002aaaaad3e423 in SyncObject::wait() () from /opt/couchbase/lib/memcached/ep.so
#2 0x00002aaaaad311a8 in EventuallyPersistentStore::initialize() () from /opt/couchbase/lib/memcached/ep.so
#3 0x00002aaaaad4a2fa in EventuallyPersistentEngine::initialize(char const*) () from /opt/couchbase/lib/memcached/ep.so
#4 0x00002aaaaaaafcf0 in ?? () from /opt/couchbase/lib/memcached/bucket_engine.so
#5 0x00002aaaaaab0814 in ?? () from /opt/couchbase/lib/memcached/bucket_engine.so
#6 0x00002aaaaaab0a25 in ?? () from /opt/couchbase/lib/memcached/bucket_engine.so
#7 0x00000000004103fb in pthread_attr_setdetachstate ()
#8 0x00000000004070fc in pthread_attr_setdetachstate ()
#9 0x00002b2eeecb8d0c in event_base_loop () from /opt/couchbase/lib/libevent-2.0.so.5
#10 0x0000000000413b54 in pthread_attr_setdetachstate ()
#11 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#12 0x000000346e8d44bd in clone () from /lib64/libc.so.6

Thread 8 (Thread 972):
#0 0x000000346e8d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b2eeecc9bc6 in ?? () from /opt/couchbase/lib/libevent-2.0.so.5
#2 0x00002b2eeecb8c11 in event_base_loop () from /opt/couchbase/lib/libevent-2.0.so.5
#3 0x0000000000413b54 in pthread_attr_setdetachstate ()
#4 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#5 0x000000346e8d44bd in clone () from /lib64/libc.so.6

--Type <return> to continue, or q <return> to quit--
Thread 7 (Thread 973):
#0 0x000000346e8d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b2eeecc9bc6 in ?? () from /opt/couchbase/lib/libevent-2.0.so.5
#2 0x00002b2eeecb8c11 in event_base_loop () from /opt/couchbase/lib/libevent-2.0.so.5
#3 0x0000000000413b54 in pthread_attr_setdetachstate ()
#4 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#5 0x000000346e8d44bd in clone () from /lib64/libc.so.6

Thread 6 (Thread 974):
#0 0x000000346e8d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b2eeecc9bc6 in ?? () from /opt/couchbase/lib/libevent-2.0.so.5
#2 0x00002b2eeecb8c11 in event_base_loop () from /opt/couchbase/lib/libevent-2.0.so.5
#3 0x0000000000413b54 in pthread_attr_setdetachstate ()
#4 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#5 0x000000346e8d44bd in clone () from /lib64/libc.so.6

Thread 5 (Thread 975):
#0 0x000000346e8d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b2eeecc9bc6 in ?? () from /opt/couchbase/lib/libevent-2.0.so.5
#2 0x00002b2eeecb8c11 in event_base_loop () from /opt/couchbase/lib/libevent-2.0.so.5
#3 0x0000000000413b54 in pthread_attr_setdetachstate ()
#4 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#5 0x000000346e8d44bd in clone () from /lib64/libc.so.6

Thread 4 (Thread 977):
#0 0x000000346f40aee9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1 0x00002aaaaad2c517 in Dispatcher::run() () from /opt/couchbase/lib/memcached/ep.so
#2 0x00002aaaaad2cb4b in ?? () from /opt/couchbase/lib/memcached/ep.so
#3 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#4 0x000000346e8d44bd in clone () from /lib64/libc.so.6

Thread 3 (Thread 979):
#0 0x000000346e8d4481 in clone () from /lib64/libc.so.6
#1 0x000000346f406660 in ?? () from /lib64/libpthread.so.0
#2 0x0000000046f56940 in ?? ()
#3 0x0000000000000000 in ?? ()

Thread 2 (Thread 980):
#0 0x000000346e8d4481 in clone () from /lib64/libc.so.6
#1 0x000000346f406660 in ?? () from /lib64/libpthread.so.0
#2 0x0000000047957940 in ?? ()
#3 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x46555940 (LWP 978)):
#0 0x000000346e830265 in raise () from /lib64/libc.so.6
#1 0x000000346e831d10 in abort () from /lib64/libc.so.6
#2 0x00002aaaaadc1d6d in CouchKVStore::listPersistedVbuckets() () from /opt/couchbase/lib/memcached/ep.so
#3 0x00002aaaaad2d9f1 in EventuallyPersistentStore::loadVBucketState() () from /opt/couchbase/lib/memcached/ep.so
#4 0x00002aaaaad96b74 in Warmup::initialize(Dispatcher&, std::tr1::shared_ptr<Task>) () from /opt/couchbase/lib/memcached/ep.so
#5 0x00002aaaaad9727a in Warmup::step(Dispatcher&, std::tr1::shared_ptr<Task>) () from /opt/couchbase/lib/memcached/ep.so
--Type <return> to continue, or q <return> to quit--
#6 0x00002aaaaad98619 in WarmupStepper::callback(Dispatcher&, std::tr1::shared_ptr<Task>) () from /opt/couchbase/lib/memcached/ep.so
#7 0x00002aaaaad2d40f in Task::run(Dispatcher&, std::tr1::shared_ptr<Task>) () from /opt/couchbase/lib/memcached/ep.so
#8 0x00002aaaaad2c2c0 in Dispatcher::run() () from /opt/couchbase/lib/memcached/ep.so
#9 0x00002aaaaad2cb4b in ?? () from /opt/couchbase/lib/memcached/ep.so
#10 0x000000346f40673d in start_thread () from /lib64/libpthread.so.0
#11 0x000000346e8d44bd in clone () from /lib64/libc.so.6