Core was generated by `/opt/couchbase/bin/memcached -C /opt/couchbase/var/lib/couchbase/config/memcach'.
 #0  0x00007f610cf70207 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55
 55	  return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
 #0  0x00007f610cf70207 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55
         resultvar = 0
         pid = 109058
         selftid = 109608
 #1  0x00007f610cf718f8 in __GI_abort () at abort.c:90
         save_stage = 2
         act = {__sigaction_handler = {sa_handler = 0x7f610d3011c0 <_IO_2_1_stderr_>, sa_sigaction = 0x7f610d3011c0 <_IO_2_1_stderr_>}, sa_mask = {__val = {140054806827001, 0, 140054806347955, 140052422907320, 140054809809344, 1, 140054809809475, 140054809793440, 140054806354126, 140054809809344, 10, 140053045053792, 140052105577776, 140053606821824, 140054806355395, 140054809809344}}, sa_flags = 229417344, sa_restorer = 0x7f607eead5b8}
         sigs = {__val = {32, 0 <repeats 15 times>}}
 #2  0x00007f610dacd195 in __gnu_cxx::__verbose_terminate_handler () at /tmp/deploy/gcc-7.3.0/libstdc++-v3/libsupc++/vterminate.cc:95
         terminating = false
         t = <optimized out>
 #3  0x0000000000555632 in backtrace_terminate_handler () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/terminate_handler.cc:86
 No locals.
 #4  0x00007f610dacaf86 in __cxxabiv1::__terminate (handler=<optimized out>) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/libsupc++/eh_terminate.cc:47
 No locals.
 #5  0x00007f610dacafd1 in std::terminate () at /tmp/deploy/gcc-7.3.0/libstdc++-v3/libsupc++/eh_terminate.cc:57
 No locals.
 #6  0x00007f61114d3c33 in GlobalTask::execute (this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/globaltask.cc:77
 No locals.
 #7  0x00007f61114cdc92 in operator() (__closure=0x7f60c57bf0c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:167
         executedAt = <optimized out>
         end = <optimized out>
         scheduleOverhead = <optimized out>
         start = {__d = {__r = 2528957095145419}}
         runAgain = false
         proxy = @0x7f607a94b6a0: <error reading variable>
 #8  folly::detail::function::FunctionTraits<void ()>::callSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{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:387
         fn = @0x7f60c57bf0c0: {__proxy = @0x7f607a94b6a0}
 #9  0x00007f611164d1d6 in operator() (this=0x7f60c57bf0c0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
         fn = @0x7f60c57bf0c0: {<folly::detail::function::FunctionTraits<void()>> = {<No data fields>}, data_ = {big = 0x7f607a94b6a0, tiny = {__data = "\240\266\224z`\177\000\000\000\000\000\000\000\000\000\000\320\364\246\va\177", '\000' <repeats 25 times>, __align = {<No data fields>}}}, call_ = 0x7f61114cdbd0 <folly::detail::function::FunctionTraits<void ()>::callSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#1}>(folly::detail::function::Data&)>, exec_ = 0x7f61114cb720 <folly::detail::function::execSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#1}>(folly::detail::function::Op, folly::detail::function::Data*, folly::detail::function::Data)>}
 #10 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (this=0x7f6104250800, thread=..., task=<unknown type in /usr/lib/debug/opt/couchbase/lib/libep.so.debug, CU 0x3084702, DIE 0x30caaf3>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:98
         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 = 2528957095140398}}
         stats = {expired = false, waitTime = {__r = 1089626}, runTime = {__r = 0}, enqueueTime = {__d = {__r = 2528957094050772}}, requestId = 0}
 #11 0x00007f61116356ca in folly::CPUThreadPoolExecutor::threadRun (this=0x7f6104250800, 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_ = 0x7f61116b537b "CPUThreadPoolExecutor", e_ = 0x7f61116b5390 ""}}}}
 #12 0x00007f61116502f9 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.
 #13 __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.
 #14 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
 No locals.
 #15 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
 No locals.
 #16 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>
 #17 0x00007f61114cc0d3 in operator() (this=0x7f610bbbaf30) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
         fn = @0x7f610bbbaf30: <error reading variable>
 #18 operator() (__closure=0x7f610bbbaf20) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
         func = <error reading variable func (Cannot access memory at address 0x7f610bbbaf30)>
         priority = <error reading variable priority (Cannot access memory at address 0x7f610bbbaf20)>
 #19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 = @0x7f610bbbaf20: <error reading variable>
 #20 0x00007f610daf5dcf in std::execute_native_thread_routine (__p=0x7f61042227c0) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
         __t = {_M_t = {_M_t = {<std::_Tuple_impl<0, std::thread::_State*, std::default_delete<std::thread::_State> >> = {<std::_Tuple_impl<1, std::default_delete<std::thread::_State> >> = {<std::_Head_base<1, std::default_delete<std::thread::_State>, true>> = {<std::default_delete<std::thread::_State>> = {<No data fields>}, <No data fields>}, <No data fields>}, <std::_Head_base<0, std::thread::_State*, false>> = {_M_head_impl = 0x7f61042227c0}, <No data fields>}, <No data fields>}}}
 #21 0x00007f610d30edd5 in start_thread (arg=0x7f60c57d8700) at pthread_create.c:307
         __res = <optimized out>
         pd = 0x7f60c57d8700
         now = <optimized out>
         unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140053606926080, -7124632337916067104, 0, 8392704, 0, 140053606926080, 7197229757983916768, 7197353376151667424}, 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>
 #22 0x00007f610d037ead in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
 No locals.