Memcached crashes while checkpointing(?) "Unhandled dwarf expression opcode 0xf3"

Build

4.0.0-1817

Found during XDCR system test.

Memcached crashed on 172.23.105.51. Unable to attach core file given its size. It can be found @ 172.23.105.51 under /data as core.memcached.3981

Full backtrace - https://friendpaste.com/7UG5rXSd0UsWtBDlZIZ6i2

Thread 1 (Thread 0x7f5d72bfd700 (LWP 4003)):
#0 0x00007f5d7721f8a5 in raise () from /lib64/libc.so.6
#1 0x00007f5d77221085 in abort () from /lib64/libc.so.6
#2 0x00007f5d6ece596c in CheckpointManager::queueDirty (this=0x7f5d65954a98, vb=..., qi=..., genSeqno=Unhandled dwarf expression opcode 0xf3
)
at /home/couchbase/jenkins/workspace/sherlock-unix/ep-engine/src/checkpoint.cc:824
#3 0x00007f5d6ed106f3 in EventuallyPersistentStore::queueDirty (this=0x7f5d75764000, vb=..., v=0x7f5bc72ab650, plh=0x7f5d72bf8960, seqno=0x7f5d72bf8940, tapBackfill=Unhandled dwarf expression opcode 0xf3
)
at /home/couchbase/jenkins/workspace/sherlock-unix/ep-engine/src/ep.cc:3186
#4 0x00007f5d6ed11777 in EventuallyPersistentStore::set (this=0x7f5d75764000, itm=..., cookie=0x7f5d02718380, force=Unhandled dwarf expression opcode 0xf3
)
at /home/couchbase/jenkins/workspace/sherlock-unix/ep-engine/src/ep.cc:748
#5 0x00007f5d6ed29b3e in EventuallyPersistentEngine::store (this=0x7f5d743e3400, cookie=0x7f5d02718380, itm=0x7f5b521cb900, cas=0x7f5d027185f8, operation=OPERATION_SET, vbucket=Unhandled dwarf expression opcode 0xf3
)
at /home/couchbase/jenkins/workspace/sherlock-unix/ep-engine/src/ep_engine.cc:2190
#6 0x00007f5d6ed29de1 in EvpStore (handle=0x7f5d743e3400, cookie=0x7f5d02718380, itm=0x7f5b521cb900, cas=0x7f5d027185f8, operation=OPERATION_SET, vbucket=Unhandled dwarf expression opcode 0xf3
)
at /home/couchbase/jenkins/workspace/sherlock-unix/ep-engine/src/ep_engine.cc:232
#7 0x00007f5d745f2307 in bucket_store (handle=0x7f5d747fa520, cookie=0x7f5d02718380, itm=0x7f5b521cb900, cas=0x7f5d027185f8, operation=OPERATION_SET, vbucket=Unhandled dwarf expression opcode 0xf3
)
at /home/couchbase/jenkins/workspace/sherlock-unix/memcached/engines/bucket_engine/bucket_engine.c:1963
#8 0x0000000000421109 in complete_update_bin (c=0x7f5d02718380) at /home/couchbase/jenkins/workspace/sherlock-unix/memcached/daemon/memcached.c:964
#9 0x0000000000421835 in complete_nread (c=0x7f5d02718380) at /home/couchbase/jenkins/workspace/sherlock-unix/memcached/daemon/memcached.c:5658
#10 conn_nread (c=0x7f5d02718380) at /home/couchbase/jenkins/workspace/sherlock-unix/memcached/daemon/memcached.c:6946
#11 0x000000000041050e in run_event_loop (c=0x7f5d02718380) at /home/couchbase/jenkins/workspace/sherlock-unix/memcached/daemon/connections.c:109
--Type <return> to continue, or q <return> to quit--
#12 0x0000000000415908 in event_handler (fd=141, which=Unhandled dwarf expression opcode 0xf3
) at /home/couchbase/jenkins/workspace/sherlock-unix/memcached/daemon/memcached.c:7265
#13 0x00007f5d78d4f488 in event_persist_closure (base=0x7f5d75454280, flags=0)
at /home/couchbase/jenkins/workspace/cbdeps-build/label/centos6/release/sherlock/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1319
#14 event_process_active_single_queue (base=0x7f5d75454280, flags=0)
at /home/couchbase/jenkins/workspace/cbdeps-build/label/centos6/release/sherlock/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1363
#15 event_process_active (base=0x7f5d75454280, flags=0)
at /home/couchbase/jenkins/workspace/cbdeps-build/label/centos6/release/sherlock/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1438
#16 event_base_loop (base=0x7f5d75454280, flags=0)
at /home/couchbase/jenkins/workspace/cbdeps-build/label/centos6/release/sherlock/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1639
#17 0x00007f5d797bf8aa in platform_thread_wrap (arg=0x7f5d756a3620) at /home/couchbase/jenkins/workspace/sherlock-unix/platform/src/cb_pthreads.c:19
#18 0x00007f5d78133851 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f5d772d590d in clone () from /lib64/libc.so.6