GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-120.el7
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /opt/couchbase/bin/memcached...Reading symbols from /usr/lib/debug/opt/couchbase/bin/memcached.debug...done.
done.
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Core was generated by `/opt/couchbase/bin/memcached -C /opt/couchbase/var/lib/couchbase/config/memcach'.
#0  __atomic_add (__val=1, __mem=0x235ca) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96
#0  __atomic_add (__val=1, __mem=0x235ca) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96
No locals.
#1  __atomic_add_dispatch (__val=1, __mem=0x235ca) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96
No locals.
#2  _M_add_ref_copy (this=0x235c2) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/shared_ptr_base.h:142
No locals.
#3  __shared_count (__r=..., this=0x7fb2c5feb548) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/shared_ptr_base.h:740
No locals.
#4  __shared_ptr (this=0x7fb2c5feb540) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/shared_ptr_base.h:1181
No locals.
#5  shared_ptr (this=0x7fb2c5feb540) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/shared_ptr.h:149
No locals.
#6  Checkpoint (this=0x7fb2c5feb540) at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/checkpoint.h:46
No locals.
#7  construct<magma::KVStoreCheckpoint, magma::Checkpoint&, magma::Checkpoint&, magma::Checkpoint&> (this=<optimized out>, __p=0x7fb2a098af40) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/new_allocator.h:150
No locals.
#8  construct<magma::KVStoreCheckpoint, magma::Checkpoint&, magma::Checkpoint&, magma::Checkpoint&> (__p=0x7fb2a098af40, __a=...) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/alloc_traits.h:512
No locals.
#9  std::vector<magma::KVStoreCheckpoint, std::allocator<magma::KVStoreCheckpoint> >::_M_realloc_insert<magma::Checkpoint&, magma::Checkpoint&, magma::Checkpoint&> (this=this@entry=0x7fb2c5feb700, __position=__position@entry=...)
    at /opt/gcc-10.2.0/include/c++/10.2.0/bits/vector.tcc:449
        __len = <optimized out>
        __old_start = <optimized out>
        __old_finish = <optimized out>
        __elems_before = <optimized out>
        __new_start = 0x7fb2a098ae80
        __new_finish = 0x7fb2a098ae80
#10 0x00000000009663cf in emplace_back<magma::Checkpoint&, magma::Checkpoint&, magma::Checkpoint&> (this=0x7fb2c5feb700) at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/kvstore.cc:1436
No locals.
#11 magma::KVStore::getAllCheckpoints(std::vector<magma::KVStoreCheckpoint, std::allocator<magma::KVStoreCheckpoint> >&) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/kvstore.cc:1436
        i = 2
        keyPoints = {<std::_Vector_base<magma::Checkpoint, std::allocator<magma::Checkpoint> >> = {
            _M_impl = {<std::allocator<magma::Checkpoint>> = {<__gnu_cxx::new_allocator<magma::Checkpoint>> = {<No data fields>}, <No data fields>}, <std::_Vector_base<magma::Checkpoint, std::allocator<magma::Checkpoint> >::_Vector_impl_data> = {
                _M_start = 0x7fb2a3c15380, _M_finish = 0x7fb2a3c153e0, _M_end_of_storage = 0x7fb2a3c15400}, <No data fields>}}, <No data fields>}
        seqPoints = {<std::_Vector_base<magma::Checkpoint, std::allocator<magma::Checkpoint> >> = {
            _M_impl = {<std::allocator<magma::Checkpoint>> = {<__gnu_cxx::new_allocator<magma::Checkpoint>> = {<No data fields>}, <No data fields>}, <std::_Vector_base<magma::Checkpoint, std::allocator<magma::Checkpoint> >::_Vector_impl_data> = {
                _M_start = 0x7fb2a3c48580, _M_finish = 0x7fb2a3c485e0, _M_end_of_storage = 0x7fb2a3c48600}, <No data fields>}}, <No data fields>}
        localPoints = {<std::_Vector_base<magma::Checkpoint, std::allocator<magma::Checkpoint> >> = {
            _M_impl = {<std::allocator<magma::Checkpoint>> = {<__gnu_cxx::new_allocator<magma::Checkpoint>> = {<No data fields>}, <No data fields>}, <std::_Vector_base<magma::Checkpoint, std::allocator<magma::Checkpoint> >::_Vector_impl_data> = {
                _M_start = 0x7fb2a314ed00, _M_finish = 0x7fb2a314ed40, _M_end_of_storage = 0x7fb2a314ed40}, <No data fields>}}, <No data fields>}
#12 0x00000000009675e4 in magma::KVStore::verifyCheckpoints() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/kvstore.cc:1482
        cpLock = {_M_device = @0x7fb2a6059f38}
        checkpoints = {<std::_Vector_base<magma::KVStoreCheckpoint, std::allocator<magma::KVStoreCheckpoint> >> = {
            _M_impl = {<std::allocator<magma::KVStoreCheckpoint>> = {<__gnu_cxx::new_allocator<magma::KVStoreCheckpoint>> = {<No data fields>}, <No data fields>}, <std::_Vector_base<magma::KVStoreCheckpoint, std::allocator<magma::KVStoreCheckpoint> >::_Vector_impl_data> = {_M_start = 0x7fb29ff14a00, _M_finish = 0x7fb29ff14ac0, _M_end_of_storage = 0x7fb29ff14ac0}, <No data fields>}}, <No data fields>}
#13 0x0000000000967fc8 in magma::KVStore::flushMemTables(magma::WAL*, magma::WALOffset, magma::FlushMode, magma::BlockingMode)::{lambda()#2}::operator()() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/kvstore.cc:513
        status = {s = {_M_t = {<std::__uniq_ptr_impl<magma::Status::state, std::default_delete<magma::Status::state> >> = {
                _M_t = {<std::_Tuple_impl<0, magma::Status::state*, std::default_delete<magma::Status::state> >> = {<std::_Tuple_impl<1, std::default_delete<magma::Status::state> >> = {<std::_Head_base<1, std::default_delete<magma::Status::state>, true>> = {<std::default_delete<magma::Status::state>> = {<No data fields>}, <No data fields>}, <No data fields>}, <std::_Head_base<0, magma::Status::state*, false>> = {_M_head_impl = 0x0}, <No data fields>}, <No data fields>}}, <No data fields>}}}
        _ = {fn = {<std::_Maybe_unary_or_binary_function<void>> = {<No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x7fb2a1d1ace0, _M_const_object = 0x7fb2a1d1ace0, 
                  _M_function_pointer = 0x7fb2a1d1ace0, _M_member_pointer = (void (std::_Undefined_class::*)(std::_Undefined_class * const)) 0x7fb2a1d1ace0, this adjustment 2}, _M_pod_data = "\340\254ѡ\262\177\000\000\002\000\000\000\000\000\000"}, 
              _M_manager = 0x960220 <std::_Function_handler<void(), magma::KVStore::flushMemTables(magma::WAL*, magma::WALOffset, magma::FlushMode, magma::BlockingMode)::<lambda()> mutable::<lambda()> >::_M_manager(std::_Any_data &, const std::_Any_data &, enum std::_Manager_operation)>}, 
            _M_invoker = 0x965900 <std::_Function_handler<void (), magma::KVStore::flushMemTables(magma::WAL*, magma::WALOffset, magma::FlushMode, magma::BlockingMode)::{lambda()#2}::operator()()::{lambda()#2}>::_M_invoke(std::_Any_data const&)>}}
        queueTime = {histogram = @0x7fb2a6501f58, startTime = {__d = {__r = 51510508912802}}}
        kFlush = {<std::__shared_ptr<magma::FlushWork, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<magma::FlushWork, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x7fb2a3702910, _M_refcount = {
              _M_pi = 0x7fb2a3702900}}, <No data fields>}
        sFlush = {<std::__shared_ptr<magma::FlushWork, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<magma::FlushWork, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x7fb2a3d55310, _M_refcount = {
              _M_pi = 0x7fb2a3d55300}}, <No data fields>}
        lFlush = {<std::__shared_ptr<magma::FlushWork, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<magma::FlushWork, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x7fb2a5f06b10, _M_refcount = {
              _M_pi = 0x7fb2a5f06b00}}, <No data fields>}
        this = 0x7fb2a6059b10
        flushMode = magma::Persistent
#14 0x00000000009687cd in magma::KVStore::flushMemTables(magma::WAL*, magma::WALOffset, magma::FlushMode, magma::BlockingMode) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/kvstore.cc:524
        status = {s = {_M_t = {<std::__uniq_ptr_impl<magma::Status::state, std::default_delete<magma::Status::state> >> = {
                _M_t = {<std::_Tuple_impl<0, magma::Status::state*, std::default_delete<magma::Status::state> >> = {<std::_Tuple_impl<1, std::default_delete<magma::Status::state> >> = {<std::_Head_base<1, std::default_delete<magma::Status::state>, true>> = {<std::default_delete<magma::Status::state>> = {<No data fields>}, <No data fields>}, <No data fields>}, <std::_Head_base<0, magma::Status::state*, false>> = {_M_head_impl = 0x0}, <No data fields>}, <No data fields>}}, <No data fields>}}}
        _ = {fn = {<std::_Maybe_unary_or_binary_function<void>> = {<No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x7fb2c5feb8b0, _M_const_object = 0x7fb2c5feb8b0, 
                  _M_function_pointer = 0x7fb2c5feb8b0, _M_member_pointer = (void (std::_Undefined_class::*)(std::_Undefined_class * const)) 0x7fb2c5feb8b0, this adjustment 140405266291472}, 
                _M_pod_data = "\260\270\376Ų\177\000\000\020\233\005\246\262\177\000"}, 
              _M_manager = 0x960020 <std::_Function_handler<void(), magma::KVStore::flushMemTables(magma::WAL*, magma::WALOffset, magma::FlushMode, magma::BlockingMode)::<lambda()> >::_M_manager(std::_Any_data &, const std::_Any_data &, enum std::_Manager_operation)>}, _M_invoker = 0x960a20 <std::_Function_handler<void(), magma::KVStore::flushMemTables(magma::WAL*, magma::WALOffset, magma::FlushMode, magma::BlockingMode)::<lambda()> >::_M_invoke(const std::_Any_data &)>}}
        wlock = {_M_device = 0x7fb2a6059d30, _M_owns = false}
        commitMeta = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7fb2c5feb900 "30252"}, _M_string_length = 5, {
            _M_local_buf = "30252\000\000\000\000'S\246\262\177\000", _M_allocated_capacity = 215640846387}}
        queueTime = {histogram = @0x7fb2a6501f58, startTime = {__d = {__r = <optimized out>}}}
        doFlushing = {__queueTime = {histogram = @0x7fb2a6501f58, startTime = {__d = {__r = 51510508912802}}}, 
          __kFlush = {<std::__shared_ptr<magma::FlushWork, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<magma::FlushWork, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x7fb2a3702910, _M_refcount = {
                _M_pi = 0x7fb2a3702900}}, <No data fields>}, __sFlush = {<std::__shared_ptr<magma::FlushWork, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<magma::FlushWork, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, 
              _M_ptr = 0x7fb2a3d55310, _M_refcount = {_M_pi = 0x7fb2a3d55300}}, <No data fields>}, 
          __lFlush = {<std::__shared_ptr<magma::FlushWork, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<magma::FlushWork, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x7fb2a5f06b10, _M_refcount = {
                _M_pi = 0x7fb2a5f06b00}}, <No data fields>}, __this = 0x7fb2a6059b10, __flushMode = magma::Persistent}
#15 0x0000000000968cc8 in magma::KVStore::FlushMemTables (this=<optimized out>, wal=<optimized out>, flushMode=<optimized out>, blockMode=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/kvstore.cc:343
        offset = {SegID = 14267046415669690290, SegOffset = 32690}
#16 0x0000000000911885 in magma::Magma::Impl::syncKVStore(unsigned short, bool) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/db.cc:1133
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
#17 0x0000000000911a60 in std::_Function_handler<void (), magma::Magma::Impl::CompactKVStore(unsigned short, magma::Magma::StoreType, std::function<std::unique_ptr<magma::Magma::CompactionCallback, std::default_delete<magma::Magma::CompactionCallback> > (unsigned short)>)::{lambda()#2}>::_M_invoke(std::_Any_data const&) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/db.cc:740
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
#18 0x000000000091838e in magma::defer::~defer (this=0x7fb2c5febbb0, __in_chrg=<optimized out>) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
No locals.
#19 0x0000000000911f0e in magma::Magma::Impl::CompactKVStore(unsigned short, magma::Magma::StoreType, std::function<std::unique_ptr<magma::Magma::CompactionCallback, std::default_delete<magma::Magma::CompactionCallback> > (unsigned short)>) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/db.cc:753
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
#20 0x0000000000911c9f in magma::Magma::Impl::CompactKVStore(unsigned short, magma::Magma::StoreType, std::function<std::unique_ptr<magma::Magma::CompactionCallback, std::default_delete<magma::Magma::CompactionCallback> > (unsigned short)>) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/db.cc:721
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
#21 0x0000000000912095 in magma::Magma::Impl::CompactKVStore(unsigned short, magma::Slice const&, magma::Slice const&, std::function<std::unique_ptr<magma::Magma::CompactionCallback, std::default_delete<magma::Magma::CompactionCallback> > (unsigned short)>) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/db.cc:773
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
#22 0x000000000091239d in magma::Magma::CompactKVStore(unsigned short, magma::Slice const&, magma::Slice const&, std::function<std::unique_ptr<magma::Magma::CompactionCallback, std::default_delete<magma::Magma::CompactionCallback> > (unsigned short)>)
    () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
#23 0x000000000087766e in MagmaMemoryTrackingProxy::CompactKVStore(unsigned short, magma::Slice const&, magma::Slice const&, std::function<std::unique_ptr<magma::Magma::CompactionCallback, std::default_delete<magma::Magma::CompactionCallback> > (unsigned short)>) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
        domainGuard = {previous = cb::Primary}
#24 0x000000000086e780 in MagmaKVStore::compactDBInternal(std::unique_lock<std::mutex>&, std::shared_ptr<CompactionContext>) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/include/memcached/vbucket.h:62
        LocalDocKey::droppedCollections = {static npos = <optimized out>, _M_len = 0, _M_str = 0x0}
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
        cb::userdataStartTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        aliveVBStates = {bits = {<std::_Base_bitset<1>> = {_M_w = 0}, <No data fields>}}
        cb::userdataEndTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        globalBucketLoggerName = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        NoopSyncWriteCompleteCb = {<std::_Maybe_unary_or_binary_function<void, CookieIface const*, cb::engine_errc>> = {<std::binary_function<CookieIface const*, cb::engine_errc, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {
            static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, 
          _M_invoker = 0x0}
        ImmediateCkptDisposer = {<std::_Maybe_unary_or_binary_function<void, boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&>> = {<std::unary_function<boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, 
                _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        NoopSeqnoAckCb = {<std::_Maybe_unary_or_binary_function<void, Vbid, long>> = {<std::binary_function<Vbid, long, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, 
            _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        flatbuffers::flatbuffer_version_string = 0xbfebb8 "FlatBuffers 1.10.0"
#25 0x000000000086ed06 in MagmaKVStore::compactDB(std::unique_lock<std::mutex>&, std::shared_ptr<CompactionContext>) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:2058
        LocalDocKey::droppedCollections = {static npos = <optimized out>, _M_len = 0, _M_str = 0x0}
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
        cb::userdataStartTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        aliveVBStates = {bits = {<std::_Base_bitset<1>> = {_M_w = 0}, <No data fields>}}
        cb::userdataEndTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        globalBucketLoggerName = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        NoopSyncWriteCompleteCb = {<std::_Maybe_unary_or_binary_function<void, CookieIface const*, cb::engine_errc>> = {<std::binary_function<CookieIface const*, cb::engine_errc, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {
            static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, 
          _M_invoker = 0x0}
        ImmediateCkptDisposer = {<std::_Maybe_unary_or_binary_function<void, boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&>> = {<std::unary_function<boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, 
                _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        NoopSeqnoAckCb = {<std::_Maybe_unary_or_binary_function<void, Vbid, long>> = {<std::binary_function<Vbid, long, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, 
            _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        flatbuffers::flatbuffer_version_string = 0xbfebb8 "FlatBuffers 1.10.0"
#26 0x0000000000806eca in EPBucket::compactInternal(LockedVBucketPtr&, CompactionConfig&) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/vbucket.h:2599
        globalBucketLoggerName = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        ImmediateCkptDisposer = {<std::_Maybe_unary_or_binary_function<void, boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&>> = {<std::unary_function<boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, 
                _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        cb::userdataEndTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        NoopSeqnoAckCb = {<std::_Maybe_unary_or_binary_function<void, Vbid, long>> = {<std::binary_function<Vbid, long, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, 
            _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
        aliveVBStates = {bits = {<std::_Base_bitset<1>> = {_M_w = 0}, <No data fields>}}
        NoopSyncWriteCompleteCb = {<std::_Maybe_unary_or_binary_function<void, CookieIface const*, cb::engine_errc>> = {<std::binary_function<CookieIface const*, cb::engine_errc, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {
            static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, 
          _M_invoker = 0x0}
        cb::userdataStartTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        flatbuffers::flatbuffer_version_string = 0xbfebb8 "FlatBuffers 1.10.0"
#27 0x00000000008089b1 in EPBucket::doCompact(Vbid, CompactionConfig&, std::vector<CookieIface const*, std::allocator<CookieIface const*> >&) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_bucket.cc:1359
        globalBucketLoggerName = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        ImmediateCkptDisposer = {<std::_Maybe_unary_or_binary_function<void, boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&>> = {<std::unary_function<boost::container::list<std::unique_ptr<Checkpoint, std::default_delete<Checkpoint> >, void>&&, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, 
                _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        cb::userdataEndTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        NoopSeqnoAckCb = {<std::_Maybe_unary_or_binary_function<void, Vbid, long>> = {<std::binary_function<Vbid, long, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, 
            _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}
        std::__ioinit = {static _S_refcount = 0, static _S_synced_with_stdio = true}
        aliveVBStates = {bits = {<std::_Base_bitset<1>> = {_M_w = 0}, <No data fields>}}
        NoopSyncWriteCompleteCb = {<std::_Maybe_unary_or_binary_function<void, CookieIface const*, cb::engine_errc>> = {<std::binary_function<CookieIface const*, cb::engine_errc, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {
            static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, 
          _M_invoker = 0x0}
        cb::userdataStartTag = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x0}, _M_string_length = 0, {
            _M_local_buf = '\000' <repeats 15 times>, _M_allocated_capacity = 0}}
        flatbuffers::flatbuffer_version_string = 0xbfebb8 "FlatBuffers 1.10.0"
#28 0x0000000000714096 in CompactTask::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/tasks.cc:73
        phosphor_internal_category_enabled_54 = {_M_b = {_M_p = 0x0}, static is_always_lock_free = <optimized out>}
        phosphor_internal_category_enabled_temp_54 = <optimized out>
        phosphor_internal_tpi_54 = {category = 0x0, name = 0x0, type = phosphor::AsyncStart, argument_names = {_M_elems = {0x0, 0x0}}, argument_types = {_M_elems = {phosphor::is_bool, phosphor::is_bool}}}
        phosphor_internal_guard_54 = {tpi = 0xfe8020 <CompactTask::run()::phosphor_internal_tpi_54>, enabled = true, arg1 = 866, arg2 = {<No data fields>}, start = {__d = {__r = 51507353171774}}}
        compactionData = {<std::__pair_base<CompactionConfig, std::vector<CookieIface const*, std::allocator<CookieIface const*> > >> = {<No data fields>}, first = {purge_before_ts = 1633596019, purge_before_seq = 0, drop_deletes = false, 
            retain_erroneous_tombstones = true}, second = {<std::_Vector_base<CookieIface const*, std::allocator<CookieIface const*> >> = {
              _M_impl = {<std::allocator<CookieIface const*>> = {<__gnu_cxx::new_allocator<CookieIface const*>> = {<No data fields>}, <No data fields>}, <std::_Vector_base<CookieIface const*, std::allocator<CookieIface const*> >::_Vector_impl_data> = {
                  _M_start = 0x7fb298e63440, _M_finish = 0x7fb298e63448, _M_end_of_storage = 0x7fb298e63448}, <No data fields>}}, <No data fields>}}
        reschedule = <optimized out>
#29 0x0000000000a54332 in GlobalTask::execute() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
        guard = {previous = 0x0}
#30 0x0000000000a514d5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7fb2c5fec840) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
        scheduleOverhead = <optimized out>
        start = {__d = {__r = 51507353169928}}
        runAgain = false
        proxy = @0x7fb3527bd540: <error reading variable>
#31 0x0000000000ba51e0 in operator() (this=0x7fb2c5fec840) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
        fn = @0x7fb2c5fec840: {<folly::detail::function::FunctionTraits<void()>> = {<No data fields>}, data_ = {big = 0x7fb3527bd540, tiny = {
              __data = "@\325{R\263\177\000\000\000\000\000\000\000\000\000\000\240\365{R\263\177\000\000\202\204\001\000\000\000\000\000X\001\000\000\000\000\000\000\020\311\376Ų\177\000", __align = {<No data fields>}}}, 
          call_ = 0xa51b90 <folly::detail::function::FunctionTraits<void ()>::callSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Data&)>, 
          exec_ = 0xa502d0 <folly::detail::function::execSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Op, folly::detail::function::Data*, folly::detail::function::Data)>}
#32 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (this=0x7fb352299400, thread=..., 
    task=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x5f9cf74, DIE 0x5fe260e>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
        rctx = {prev_ = {<std::__shared_ptr<folly::RequestContext, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<folly::RequestContext, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x0, _M_refcount = {
                _M_pi = 0x0}}, <No data fields>}}
        startTime = {__d = {__r = 51507353166881}}
        stats = {expired = false, waitTime = {__r = 5132504}, runTime = {__r = 0}, enqueueTime = {__d = {__r = 51507348034377}}, requestId = 0}
#33 0x0000000000b8cf9a in folly::CPUThreadPoolExecutor::threadRun (this=0x7fb352299400, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
        guard = {list_ = {forbid = true, prev = 0x0, curr = {name = {static npos = <optimized out>, b_ = 0xc5e5ab "CPUThreadPoolExecutor", e_ = 0xc5e5c0 ""}}}}
#34 0x0000000000ba8199 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__t=<optimized out>, 
    __f=<optimized out>) at /usr/local/include/c++/7.3.0/bits/invoke.h:73
No locals.
#35 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
    at /usr/local/include/c++/7.3.0/bits/invoke.h:95
No locals.
#36 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
No locals.
#37 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
No locals.
#38 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
        fn = <optimized out>
#39 0x0000000000a51164 in operator() (this=0x7fb3527dd180) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
        fn = @0x7fb3527dd180: <error reading variable>
#40 operator() (__closure=0x7fb3527dd180) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
        threadNameOpt = {storage_ = {{emptyState = -96 '\240', value = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
                  _M_p = 0x7fb2c5fec9a0 "WriterPool13"}, _M_string_length = 12, {_M_local_buf = "WriterPool13\000\000\000", _M_allocated_capacity = 8021036716417184343}}}, hasValue = true}}
        func = <error reading variable func (Cannot access memory at address 0x7fb3527dd180)>
#41 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
        fn = @0x7fb3527dd180: <error reading variable>
#42 0x00007fb3542a7d40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
No locals.
#43 0x00007fb3560afea5 in start_thread (arg=0x7fb2c5ffe700) at pthread_create.c:307
        __res = <optimized out>
        pd = 0x7fb2c5ffe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140405802788608, -9072772351209716611, 0, 8392704, 3, 140405802788608, 9039430751625987197, 9039187931766637693}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, 
              cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
#44 0x00007fb3539f08dd in ioperm () at ../sysdeps/unix/syscall-template.S:81
No locals.
#45 0x0000000000000000 in ?? ()
No symbol table info available.
No core file now.