Crash in lcbvb_destroy function

#0 __GI___libc_free (mem=0x7f046c44ee80) at malloc.c:2941

#1 0x00007f048c0b1bbb in lcbvb_destroy (conf=0x7f046c052b10)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/vbucket/vbucket.c:853

#2 0x00007f048c0e6d64 in decref (this=0x7f046c050ae0)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/bucketconfig/clconfig.h:546

#3 update (data=0x7f046c022db0 <Address 0x7f046c022db0 out of bounds>, host=<optimized out>, this=0x7f04840f6e10)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/bucketconfig/bc_cccp.cc:207

#4 lcb::clconfig::cccp_update (provider=provider@entry=0x7f04840f6e10, host=<optimized out>, 

 data=0x7f046c022db0 <Address 0x7f046c022db0 out of bounds>)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/bucketconfig/bc_cccp.cc:175

#5 0x00007f048c127136 in lcb::Server::handle_nmv (this=this@entry=0x7f0484111550, resinfo=..., oldpkt=oldpkt@entry=0x7f048412cbd0)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/mcserver/mcserver.cc:151

#6 0x00007f048c129d49 in try_read (ior=0x7f048411ac28, ctx=0x7f048411abe0, this=0x7f0484111550)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/mcserver/mcserver.cc:396

#7 on_read (ctx=0x7f048411abe0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/mcserver/mcserver.cc:460

#8 0x00007f048c0c3d4c in invoke_read_cb (nb=10969, ctx=0x7f048411abe0)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/lcbio/ctx.c:278

#9 E_handler (sock=<optimized out>, which=<optimized out>, arg=0x7f048411abe0)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/lcbio/ctx.c:307

#10 0x00007f048c0a9852 in run_loop (io=<optimized out>, is_tick=<optimized out>)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/plugins/io/select/plugin-select.c:323

#11 0x00007f048c13847e in lcb_wait (instance=0x7f04840f64c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/libcouchbase/src/wait.cc:103

#12 0x0000000000463596 in RetryWithFixedBackoff<bool (&)(lcb_error_t), lcb_error_t (&)(lcb_st*), lcb_st*&, lcb_error_t, 0> (

 callable=@0x40a460: \{lcb_error_t (lcb_st *)} 0x40a460 <lcb_wait@plt>, isRetriable=<optimized out>, initial_delay_milliseconds=200, 

 max_retry_count=5)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/features/include/retry_util.h:40

#13 0x0000000000464b01 in timer::TimerStore::GetCounter (this=this@entry=0x7f04840cf240, key=...)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing-ee/features/src/timer_store.cc:319

#14 0x00000000004664d0 in timer::TimerStore::SetTimer (this=0x7f04840cf240, timer=...)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing-ee/features/src/timer_store.cc:47

#15 0x000000000041f846 in V8Worker::SetTimer (this=this@entry=0x7f0484013700, tinfo=...)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/v8_consumer/src/v8worker.cc:1148

#16 0x000000000043dbdf in Timer::CreateTimerImpl (this=0x7f04840c22b0, args=...)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/v8_consumer/src/timer.cc:98

#17 0x000000000043e286 in CreateTimer (args=...)

 at /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/eventing/v8_consumer/src/timer.cc:142

#18 0x00007f048d88c239 in v8::internal::FunctionCallbackArguments::Call(v8::internal::CallHandlerInfo*) () from /opt/couchbase/lib/libv8.so

#19 0x00007f048d88b738 in v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::BuiltinArguments) () from /opt/couchbase/lib/libv8.so

#20 0x00007f048d88aec6 in v8::internal::Builtin_Impl_HandleApiCall(v8::internal::BuiltinArguments, v8::internal::Isolate*) ()

 from /opt/couchbase/lib/libv8.so

#21 0x00007f048e0c48ae in Builtins_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit () from /opt/couchbase/lib/libv8.so

#22 0x00002618c730816e in ?? ()

#23 0x0000028282c825a1 in ?? ()

#24 0x00002617c3a9d139 in ?? ()

#25 0x0000000900000000 in ?? ()

#26 0x0000028282c82681 in ?? ()

#27 0x0000065d78b0b0e9 in ?? ()

#28 0x0000364842a7fcd9 in ?? ()

#29 0x0000065d78b0af49 in ?? ()

#30 0x0000364842a094a9 in ?? ()

#31 0x00001f7c96f04679 in ?? ()

#32 0x0000065d78b0b0e9 in ?? ()

#33 0x0000364842a7fcd9 in ?? ()

#34 0x0000065d78b0af49 in ?? ()

#35 0x0000364842a094a9 in ?? ()

#36 0x00002617c3a9d139 in ?? ()

#37 0x0000065d78b0b0e9 in ?? ()

#38 0x0000065d78b0b0c9 in ?? ()

#39 0x0000065d78b0b099 in ?? ()

#40 0x0000065d78b0af49 in ?? ()

#41 0x000000a300000000 in ?? ()

#42 0x0000364842a09e91 in ?? ()

#43 0x0000364842a09441 in ?? ()

#44 0x00002617c3a82ad9 in ?? ()

#45 0x00007f0481e324c8 in ?? ()

#46 0x00007f048e034603 in Builtins_JSEntryTrampoline () from /opt/couchbase/lib/libv8.so

#47 0x0000065d78b0aed9 in ?? ()

#48 0x0000065d78b0ac81 in ?? ()

#49 0x00001f7c96f04679 in ?? ()

#50 0x0000364842a09441 in ?? ()

#51 0x0000000000000020 in ?? ()

#52 0x00007f0481e32530 in ?? ()

#53 0x00002618c73040de in ?? ()

#54 0x0000000000000000 in ?? ()

./testrunner -i /tmp/testexec.17696.ini -p get-cbcollect-info=True,GROUP=source_bucket_mutation_timers -t eventing.eventing_rebalance.EventingRebalance.test_eventing_rebalance_with_multiple_kv_nodes,doc-per-day=5,dataset=default,nodes_init=5,services_init=kv-kv-kv-eventing-index:n1ql,groups=simple,reset_services=True,handler_code=source_bucket_mutation_with_timers,source_bucket_mutation=True,GROUP=source_bucket_mutation_timers