anchor.diff:  
   mover_inner(Parent, Bucket, VBucket,
               [Node|_] = OldChain, [NewNode|_] = NewChain) ->
  -    process_flag(trap_exit, true),
  -
       inhibit_view_compaction(Parent, Node, Bucket, NewNode),
   
       % build new chain as replicas of existing master
  
positive.code: 
  mover_inner_old_style(Parent, Bucket, VBucket,
                        [Node|_], [NewNode|_] = NewChain) ->
      process_flag(trap_exit, true),
      % build new chain as replicas of existing master
      {ReplicaNodes, JustBackfillNodes} =
          get_replica_and_backfill_nodes(Node, NewChain),
  
negative.code: 
  mover_inner_dcp(Parent, Bucket, VBucket,
                  [OldMaster|_] = OldChain, [NewMaster|_] = NewChain, IndexAware) ->
      maybe_inhibit_view_compaction(Parent, OldMaster, Bucket, NewMaster, IndexAware),
  
      %% build new chain as replicas of existing master
  