subchannel-ref-increment

#0  0x00007f705e04a61f in gpr_atm_rel_cas (p=0x7f7020006348, o=65537, n=131073)
    at include/grpc/impl/codegen/atm_gcc_atomic.h:75
#1  0x00007f705e04a9d7 in grpc_subchannel_ref_from_weak_ref (c=0x7f7020006340, 
    file=0x7f705e1f5ae8 "src/core/ext/filters/client_channel/subchannel_index.cc", line=151, 
    reason=0x7f705e1f5b20 "index_find") at src/core/ext/filters/client_channel/subchannel.cc:241
#2  0x00007f705e04cda5 in grpc_subchannel_index_find (key=0x7f7010005180)
    at src/core/ext/filters/client_channel/subchannel_index.cc:149
#3  0x00007f705e04af8c in grpc_subchannel_create (connector=0x7f70100050b0, args=0x7f702d7f9aa0)
    at src/core/ext/filters/client_channel/subchannel.cc:339
#4  0x00007f705e04f4c9 in client_channel_factory_create_subchannel (
    cc_factory=0x7f705e49edb8 <_ZL22client_channel_factory>, args=0x7f702d7f9aa0)
    at src/core/ext/transport/chttp2/client/insecure/channel_create.cc:42
#5  0x00007f705e048d0f in grpc_client_channel_factory_create_subchannel (
    factory=0x7f705e49edb8 <_ZL22client_channel_factory>, args=0x7f702d7f9aa0)
    at src/core/ext/filters/client_channel/client_channel_factory.cc:32
#6  0x00007f705e0ee65e in grpc_lb_subchannel_list_create (p=0x7f705800a5b0, 
    tracer=0x7f705e4afb50 <grpc_lb_pick_first_trace>, addresses=0x7f7010007520, args=0x7f702d7f9c60, 
    connectivity_changed_cb=0x7f705e0ed54c <pf_connectivity_changed_locked(void*, grpc_error*)>)
    at src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc:125
#7  0x00007f705e0ed1ed in pf_update_locked (policy=0x7f705800a5b0, args=0x7f702d7f9c60)
    at src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc:261
#8  0x00007f705e049238 in grpc_lb_policy_update_locked (policy=0x7f705800a5b0, lb_policy_args=0x7f702d7f9c60)
    at src/core/ext/filters/client_channel/lb_policy.cc:116
#9  0x00007f705e044cb6 in on_resolver_result_changed_locked (arg=0x1301a8b8, error=0x0)
    at src/core/ext/filters/client_channel/client_channel.cc:453
#10 0x00007f705e0a89d3 in grpc_combiner_continue_exec_ctx () at src/core/lib/iomgr/combiner.cc:261
#11 0x00007f705e015a4c in grpc_core::ExecCtx::Flush (this=0x7f702d7f9e20) at src/core/lib/iomgr/exec_ctx.cc:128
#12 0x00007f705e015cec in run_closures (list=...) at src/core/lib/iomgr/executor.cc:80
#13 0x00007f705e0162af in executor_thread (arg=0x12c52640) at src/core/lib/iomgr/executor.cc:177
#14 0x00007f705e053d12 in thread_body (v=0x7f703400fe00) at src/core/lib/gpr/thd_posix.cc:67
#15 0x00007f7071bfb08c in start_thread () from /usr/lib/libpthread.so.0
#16 0x00007f7070f17e7f in clone () from /usr/lib/libc.so.6