GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-119.el7
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<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  0x00007f66e420b387 in raise () from /lib64/libc.so.6
#0  0x00007f66e420b387 in raise () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f66e420ca78 in abort () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007f66e4b5663c in __gnu_cxx::__verbose_terminate_handler () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/libsupc++/vterminate.cc:95
        terminating = false
        t = <optimized out>
#3  0x0000000000a9527b in backtrace_terminate_handler() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/terminate_handler.cc:88
No locals.
#4  0x00007f66e4b618f6 in __cxxabiv1::__terminate(void (*)()) () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/libsupc++/eh_terminate.cc:48
No locals.
#5  0x00007f66e4b61961 in std::terminate () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/libsupc++/eh_terminate.cc:58
No locals.
#6  0x00007f66e4b61bf4 in __cxxabiv1::__cxa_throw (obj=obj@entry=0x7f6690000940, tinfo=tinfo@entry=0xf98fc0 <typeinfo for boost::exception_detail::error_info_injector<std::underflow_error>>, 
    dest=dest@entry=0x6dd880 <boost::exception_detail::error_info_injector<std::underflow_error>::~error_info_injector()>) at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/libsupc++/eh_throw.cc:95
        globals = <optimized out>
        header = 0x7f66900008c0
#7  0x00000000006e1132 in cb::throwWithTrace<std::underflow_error> (exception=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/boost.exploded/include/boost/exception/info.hpp:129
No locals.
#8  0x00000000004da71e in cb::ThrowExceptionUnderflowPolicy<unsigned long>::underflow (current=0, arg=-1322, desired=<optimized out>, this=0x7f664f73e4f8) at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:779
No locals.
#9  0x0000000000879982 in store (desired=18446744073709550294, this=0x7f664f73e4f8) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_mutex.h:104
No locals.
#10 NonNegativeCounter (initial=18446744073709550294, this=0x7f664f73e4f8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/include/platform/non_negative_counter.h:81
No locals.
#11 _M_construct<unsigned long&> (this=0x7f664f73e4f8) at /opt/gcc-10.2.0/include/c++/10.2.0/optional:419
No locals.
#12 operator=<long unsigned int&> (__u=<synthetic pointer>, __u=<synthetic pointer>, this=0x7f664f73e4f8) at /opt/gcc-10.2.0/include/c++/10.2.0/optional:794
No locals.
#13 setBackfillRemaining_UNLOCKED (value=18446744073709550294, this=0x7f664f73e390) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/active_stream.cc:642
No locals.
#14 ActiveStream::setBackfillRemaining(unsigned long) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/active_stream.cc:638
        guard = {_M_device = @0x7f664f73e3f8}
#15 0x0000000000883042 in DCPBackfillBySeqnoDisk::create() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill_by_seqno_disk.cc:152
        markerSent = <optimized out>
        stream = {<std::__shared_ptr<ActiveStream, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<ActiveStream, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = <optimized out>, _M_refcount = {
              _M_pi = 0x7f664f73e380}}, <No data fields>}
        vbid = {vbid = 659}
        lastPersistedSeqno = <optimized out>
        kvstore = <optimized out>
        valFilter = VALUES_COMPRESSED
        scanCtx = {_M_t = {<std::__uniq_ptr_impl<BySeqnoScanContext, std::default_delete<BySeqnoScanContext> >> = {
              _M_t = {<std::_Tuple_impl<0, BySeqnoScanContext*, std::default_delete<BySeqnoScanContext> >> = {<std::_Tuple_impl<1, std::default_delete<BySeqnoScanContext> >> = {<std::_Head_base<1, std::default_delete<BySeqnoScanContext>, true>> = {<std::default_delete<BySeqnoScanContext>> = {<No data fields>}, <No data fields>}, <No data fields>}, <std::_Head_base<0, BySeqnoScanContext*, false>> = {
                    _M_head_impl = 0x7f66509ca440}, <No data fields>}, <No data fields>}}, <No data fields>}}
        collHighSuccess = <unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x4049840, DIE 0x407c2d1>
        collHigh = <unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x4049840, DIE 0x407c2e1>
        allowNonRollBackCollectionStream = <optimized out>
#16 0x0000000000884d23 in DCPBackfillDisk::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill_disk.cc:131
        lh = {_M_device = @0x7f664fff5388}
#17 0x00000000008868a1 in BackfillManager::backfill() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill-manager.cc:333
        lh = {_M_device = <optimized out>, _M_owns = false}
        backfill = {_M_t = {<std::__uniq_ptr_impl<DCPBackfillIface, std::default_delete<DCPBackfillIface> >> = {
              _M_t = {<std::_Tuple_impl<0, DCPBackfillIface*, std::default_delete<DCPBackfillIface> >> = {<std::_Tuple_impl<1, std::default_delete<DCPBackfillIface> >> = {<std::_Head_base<1, std::default_delete<DCPBackfillIface>, true>> = {<std::default_delete<DCPBackfillIface>> = {<No data fields>}, <No data fields>}, <No data fields>}, <std::_Head_base<0, DCPBackfillIface*, false>> = {
                    _M_head_impl = 0x7f664fff53e0}, <No data fields>}, <No data fields>}}, <No data fields>}}
        source = BackfillManager::Initializing
        status = <optimized out>
#18 0x0000000000886e84 in BackfillManagerTask::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill-manager.cc:71
        phosphor_internal_category_enabled_60 = {_M_b = {_M_p = 0x0}, static is_always_lock_free = <optimized out>}
        phosphor_internal_category_enabled_temp_60 = <optimized out>
        phosphor_internal_tpi_60 = {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_60 = {tpi = 0xf93040 <BackfillManagerTask::run()::phosphor_internal_tpi_60>, enabled = true, arg1 = {<No data fields>}, arg2 = {<No data fields>}, start = {__d = {__r = 7572492077418591}}}
        manager = {<std::__shared_ptr<BackfillManager, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<BackfillManager, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = <optimized out>, _M_refcount = {
              _M_pi = 0x7f6650a39540}}, <No data fields>}
        status = <optimized out>
#19 0x00000000009fdc12 in GlobalTask::execute() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
        guard = {previous = 0x0}
#20 0x00000000009fad35 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f66c4fe7540)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
        scheduleOverhead = <optimized out>
        start = {__d = {__r = 7572492077416524}}
        runAgain = false
        proxy = @0x7f66e2d75d60: <error reading variable>
#21 0x0000000000b55d40 in operator() (this=0x7f66c4fe7540) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
        fn = @0x7f66c4fe7540: {<folly::detail::function::FunctionTraits<void()>> = {<No data fields>}, data_ = {big = 0x7f66e2d75d60, tiny = {
              __data = "`]\327\342f\177\000\000\000\000\000\000\000\000\000\000\300\377\326\342f\177\000\000\\\224\000\000\000\000\000\000\230\000\000\000\000\000\000\000\020v\376\304f\177\000", __align = {<No data fields>}}}, 
          call_ = 0x9fb3f0 <folly::detail::function::FunctionTraits<void ()>::callSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Data&)>, 
          exec_ = 0x9f9a20 <folly::detail::function::execSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Op, folly::detail::function::Data*, folly::detail::function::Data)>}
#22 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (this=0x7f66e2b36000, thread=..., 
    task=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x6463ba5, DIE 0x64a93d4>)
    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 = 7572492077411983}}
        stats = {expired = false, waitTime = {__r = 41393}, runTime = {__r = 0}, enqueueTime = {__d = {__r = 7572492077370590}}, requestId = 0}
#23 0x0000000000b3dafa in folly::CPUThreadPoolExecutor::threadRun (this=0x7f66e2b36000, 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_ = 0xc05d4b "CPUThreadPoolExecutor", e_ = 0xc05d60 ""}}}}
#24 0x0000000000b58cf9 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.
#25 __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.
#26 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
No locals.
#27 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
No locals.
#28 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>
#29 0x00000000009fa8b4 in operator() (this=0x7f66e2ab3a80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
        fn = @0x7f66e2ab3a80: <error reading variable>
#30 operator() (__closure=0x7f66e2ab3a80) 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 = 0x7f66c4fe76a0 "AuxIoPool0"}, _M_string_length = 10, {_M_local_buf = "AuxIoPool0\000\000\000\000\000", _M_allocated_capacity = 8029725099529106753}}}, hasValue = true}}
        func = <error reading variable func (Cannot access memory at address 0x7f66e2ab3a80)>
#31 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 = @0x7f66e2ab3a80: <error reading variable>
#32 0x00007f66e4b8ad40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
No locals.
#33 0x00007f66e69a6ea5 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#34 0x00007f66e42d38dd in clone () from /lib64/libc.so.6
No symbol table info available.
No core file now.