Memcached core due to segfault (due to tcmalloc) post bucket deletion

Program terminated with signal 11, Segmentation fault.
#0 0x00000036c426e361 in _IO_default_xsputn_internal () from /lib64/libc.so.6
(gdb) t a a bt

Thread 9 (Thread 0x2b0333345220 (LWP 14806)):
#0 0x00000036c42d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b0332ec7be8 in epoll_dispatch (base=0x16dba000, tv=<value optimized out>) at epoll.c:404
#2 0x00002b0332eb5d5a in event_base_loop (base=0x16dba000, flags=<value optimized out>) at event.c:1558
#3 0x0000000000408dba in main (argc=<value optimized out>, argv=<value optimized out>) at daemon/memcached.c:7561

Thread 8 (Thread 14814):
#0 0x00000036c42c678b in read () from /lib64/libc.so.6
#1 0x00000036c426cd57 in _IO_new_file_underflow () from /lib64/libc.so.6
#2 0x00000036c426d71e in _IO_default_uflow_internal () from /lib64/libc.so.6
#3 0x00000036c4262804 in _IO_getline_info_internal () from /lib64/libc.so.6
#4 0x00000036c42616a9 in fgets () from /lib64/libc.so.6
#5 0x00002b0333346930 in check_stdin_thread (arg=<value optimized out>) at extensions/daemon/stdin_check.c:37
#6 0x00000036c4e0673d in start_thread () from /lib64/libpthread.so.0
#7 0x00000036c42d44bd in clone () from /lib64/libc.so.6

Thread 7 (Thread 14815):
#0 0x00000036c42d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b0332ec7be8 in epoll_dispatch (base=0x16dba500, tv=<value optimized out>) at epoll.c:404
#2 0x00002b0332eb5d5a in event_base_loop (base=0x16dba500, flags=<value optimized out>) at event.c:1558
#3 0x0000000000413a54 in worker_libevent (arg=0x16d92500) at daemon/thread.c:301
#4 0x00000036c4e0673d in start_thread () from /lib64/libpthread.so.0
#5 0x00000036c42d44bd in clone () from /lib64/libc.so.6

Thread 6 (Thread 14816):
#0 0x00000036c42d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b0332ec7be8 in epoll_dispatch (base=0x16dba280, tv=<value optimized out>) at epoll.c:404
#2 0x00002b0332eb5d5a in event_base_loop (base=0x16dba280, flags=<value optimized out>) at event.c:1558
#3 0x0000000000413a54 in worker_libevent (arg=0x16d925f8) at daemon/thread.c:301
#4 0x00000036c4e0673d in start_thread () from /lib64/libpthread.so.0
#5 0x00000036c42d44bd in clone () from /lib64/libc.so.6

Thread 5 (Thread 14817):
#0 0x00000036c42d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b0332ec7be8 in epoll_dispatch (base=0x16dbac80, tv=<value optimized out>) at epoll.c:404
#2 0x00002b0332eb5d5a in event_base_loop (base=0x16dbac80, flags=<value optimized out>) at event.c:1558
#3 0x0000000000413a54 in worker_libevent (arg=0x16d926f0) at daemon/thread.c:301
#4 0x00000036c4e0673d in start_thread () from /lib64/libpthread.so.0
#5 0x00000036c42d44bd in clone () from /lib64/libc.so.6

Thread 4 (Thread 14818):
#0 0x00000036c42d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b0332ec7be8 in epoll_dispatch (base=0x16dbaa00, tv=<value optimized out>) at epoll.c:404
#2 0x00002b0332eb5d5a in event_base_loop (base=0x16dbaa00, flags=<value optimized out>) at event.c:1558
#3 0x0000000000413a54 in worker_libevent (arg=0x16d927e8) at daemon/thread.c:301
#4 0x00000036c4e0673d in start_thread () from /lib64/libpthread.so.0
#5 0x00000036c42d44bd in clone () from /lib64/libc.so.6

Thread 3 (Thread 14819):
#0 0x00000036c42d48a8 in epoll_wait () from /lib64/libc.so.6
#1 0x00002b0332ec7be8 in epoll_dispatch (base=0x16dba780, tv=<value optimized out>) at epoll.c:404
#2 0x00002b0332eb5d5a in event_base_loop (base=0x16dba780, flags=<value optimized out>) at event.c:1558
#3 0x0000000000413a54 in worker_libevent (arg=0x16d928e0) at daemon/thread.c:301
#4 0x00000036c4e0673d in start_thread () from /lib64/libpthread.so.0
#5 0x00000036c42d44bd in clone () from /lib64/libc.so.6

Thread 2 (Thread 14838):
#0 0x00000036c429a541 in nanosleep () from /lib64/libc.so.6
#1 0x00000036c42cded4 in usleep () from /lib64/libc.so.6
#2 0x00002aaaaad51688 in updateStatsThread (arg=<value optimized out>) at memory_tracker.cc:31
#3 0x00000036c4e0673d in start_thread () from /lib64/libpthread.so.0
--Type <return> to continue, or q <return> to quit--
#4 0x00000036c42d44bd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x483d8940 (LWP 15411)):
#0 0x00000036c426e361 in _IO_default_xsputn_internal () from /lib64/libc.so.6
#1 0x00000036c42429f0 in vfprintf () from /lib64/libc.so.6
#2 0x00000036c42696cd in vasprintf () from /lib64/libc.so.6
#3 0x00000036c424d708 in asprintf () from /lib64/libc.so.6
#4 0x00000036c42296af in __assert_fail () from /lib64/libc.so.6
#5 0x00002aaaaad87563 in ObjectRegistry::memoryDeallocated (mem=224) at objectregistry.cc:135
#6 0x00002b033312162b in MallocHook::InvokeDeleteHookSlow(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#7 0x00002b03331173b4 in MallocHook::InvokeDeleteHook(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#8 0x00002b0333114956 in (anonymous namespace)::do_realloc_with_callback(void*, unsigned long, void (void*), unsigned long (void const*)) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#9 0x00002b033311499d in (anonymous namespace)::do_realloc(void*, unsigned long) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#10 0x00002b0333127d09 in tc_realloc () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#11 0x00000036c4269706 in vasprintf () from /lib64/libc.so.6
#12 0x00000036c424d708 in asprintf () from /lib64/libc.so.6
#13 0x00000036c42296af in __assert_fail () from /lib64/libc.so.6
#14 0x00002aaaaad87563 in ObjectRegistry::memoryDeallocated (mem=224) at objectregistry.cc:135
#15 0x00002b033312162b in MallocHook::InvokeDeleteHookSlow(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#16 0x00002b03331173b4 in MallocHook::InvokeDeleteHook(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#17 0x00002b0333114956 in (anonymous namespace)::do_realloc_with_callback(void*, unsigned long, void (void*), unsigned long (void const*)) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#18 0x00002b033311499d in (anonymous namespace)::do_realloc(void*, unsigned long) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#19 0x00002b0333127d09 in tc_realloc () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#20 0x00000036c4269706 in vasprintf () from /lib64/libc.so.6
#21 0x00000036c424d708 in asprintf () from /lib64/libc.so.6
#22 0x00000036c42296af in __assert_fail () from /lib64/libc.so.6
#23 0x00002aaaaad87563 in ObjectRegistry::memoryDeallocated (mem=224) at objectregistry.cc:135
#24 0x00002b033312162b in MallocHook::InvokeDeleteHookSlow(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#25 0x00002b03331173b4 in MallocHook::InvokeDeleteHook(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#26 0x00002b0333114956 in (anonymous namespace)::do_realloc_with_callback(void*, unsigned long, void (void*), unsigned long (void const*)) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#27 0x00002b033311499d in (anonymous namespace)::do_realloc(void*, unsigned long) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#28 0x00002b0333127d09 in tc_realloc () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#29 0x00000036c4269706 in vasprintf () from /lib64/libc.so.6
#30 0x00000036c424d708 in asprintf () from /lib64/libc.so.6
#31 0x00000036c42296af in __assert_fail () from /lib64/libc.so.6
#32 0x00002aaaaad87563 in ObjectRegistry::memoryDeallocated (mem=224) at objectregistry.cc:135
#33 0x00002b033312162b in MallocHook::InvokeDeleteHookSlow(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#34 0x00002b03331173b4 in MallocHook::InvokeDeleteHook(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#35 0x00002b0333114956 in (anonymous namespace)::do_realloc_with_callback(void*, unsigned long, void (void*), unsigned long (void const*)) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#36 0x00002b033311499d in (anonymous namespace)::do_realloc(void*, unsigned long) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#37 0x00002b0333127d09 in tc_realloc () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#38 0x00000036c4269706 in vasprintf () from /lib64/libc.so.6
#39 0x00000036c424d708 in asprintf () from /lib64/libc.so.6
#40 0x00000036c42296af in __assert_fail () from /lib64/libc.so.6
#41 0x00002aaaaad87563 in ObjectRegistry::memoryDeallocated (mem=224) at objectregistry.cc:135
#42 0x00002b033312162b in MallocHook::InvokeDeleteHookSlow(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#43 0x00002b03331173b4 in MallocHook::InvokeDeleteHook(void const*) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#44 0x00002b0333114956 in (anonymous namespace)::do_realloc_with_callback(void*, unsigned long, void (void*), unsigned long (void const*)) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#45 0x00002b033311499d in (anonymous namespace)::do_realloc(void*, unsigned long) () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#46 0x00002b0333127d09 in tc_realloc () from /opt/couchbase/lib/libtcmalloc_minimal.so.4
#47 0x00000036c4269706 in vasprintf () from /lib64/libc.so.6
#48 0x00000036c424d708 in asprintf () from /lib64/libc.so.6
#49 0x00000036c42296af in __assert_fail () from /lib64/libc.so.6