(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:addrs)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: <Id.Left_Backtick '`'>
                child: 
                  (command.Pipeline
                    children: [
                      (C {<grep>} {<DW_OP_addr>} {<two_file_shared.dbg>})
                      (C {<fgrep>} {(SQ <'(DW_OP_addr: 0)'>)})
                    ]
                    negated: F
                  )
              )
            }
          spids: [58]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: (C {<test>} {<-n>} {(DQ ($ Id.VSub_DollarName '$addrs'))})
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (C {<echo>} {(DQ <'Found variables with address zero'>)})
            (C {<echo>} {($ Id.VSub_DollarName '$addrs')})
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
          spids: [77 88]
        )
      ]
    )
  ]
)