(command.CommandList
  children: [
    (C {(.)} {($ VSub_DollarName '$_Dbg_main')})
    (command.AndOr
      ops: [Op_DAmp]
      children: [
        (command.DParen
          child: 
            (arith_expr.ArithBinary
              op_id: Arith_Great
              left: (arith_expr.ArithVarRef token:<Lit_ArithVarLike OPTLIND>)
              right: (arith_expr.ArithWord w:{(Lit_Digits 0)})
            )
        )
        (C {(shift)} 
          {
            (DQ 
              (word_part.ArithSubPart
                anode: 
                  (arith_expr.ArithBinary
                    op_id: Arith_Minus
                    left: (arith_expr.ArithVarRef token:<Lit_ArithVarLike OPTLIND>)
                    right: (arith_expr.ArithWord w:{(Lit_Digits 1)})
                  )
              )
            )
          }
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.AndOr
                  ops: [Op_DAmp]
                  children: [
                    (command.DParen
                      child: 
                        (arith_expr.ArithBinary
                          op_id: Arith_DEqual
                          left: (arith_expr.ArithWord w:{($ VSub_Pound '$#')})
                          right: (arith_expr.ArithWord w:{(Lit_Digits 0)})
                        )
                    )
                    (command.DBracket
                      expr: 
                        (bool_expr.BoolUnary
                          op_id: BoolUnary_z
                          child: {($ VSub_DollarName '$_Dbg_EXECUTION_STRING')}
                        )
                    )
                  ]
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (command.SimpleCommand
              words: [
                {(echo)}
                {
                  (DQ (${ VSub_Name _Dbg_pname) 
                    (': need to give a script to debug or use the -c option.')
                  )
                }
              ]
              redirects: [(redir.Redir op:<Redir_GreatAnd '>&'> fd:16777215 arg_word:{(2)})]
            )
            (command.ControlFlow token:<ControlFlow_Exit exit> arg_word:{(1)})
          ]
        )
      ]
    )
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (lhs_expr.LhsName name:_Dbg_script_file)
          op: Equal
          rhs: {(DQ ($ VSub_Number '$1'))}
        )
      ]
    )
    (C {(shift)})
    (command.AndOr
      ops: [Op_DAmp]
      children: [
        (command.DBracket
          expr: 
            (bool_expr.BoolBinary
              op_id: BoolBinary_GlobDEqual
              left: {($ VSub_Number '$1')}
              right: {(SQ <-->)}
            )
        )
        (C {(shift)})
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.AndOr
                  ops: [Op_DAmp]
                  children: [
                    (command.DBracket
                      expr: 
                        (bool_expr.LogicalNot
                          child: 
                            (bool_expr.BoolUnary
                              op_id: BoolUnary_d
                              child: {($ VSub_DollarName '$_Dbg_tmpdir')}
                            )
                        )
                    )
                    (command.DBracket
                      expr: 
                        (bool_expr.LogicalNot
                          child: 
                            (bool_expr.BoolUnary
                              op_id: BoolUnary_w
                              child: {($ VSub_DollarName '$_Dbg_tmpdir')}
                            )
                        )
                    )
                  ]
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (command.SimpleCommand
              words: [
                {(echo)}
                {
                  (DQ (${ VSub_Name _Dbg_pname) (': cannot write to temp directory ') 
                    ($ VSub_DollarName '$_Dbg_tmpdir') (.)
                  )
                }
              ]
              redirects: [(redir.Redir op:<Redir_GreatAnd '>&'> fd:16777215 arg_word:{(2)})]
            )
            (command.SimpleCommand
              words: [{(echo)} {(DQ (${ VSub_Name _Dbg_pname) (': Use -T try directory location.'))}]
              redirects: [(redir.Redir op:<Redir_GreatAnd '>&'> fd:16777215 arg_word:{(2)})]
            )
            (command.ControlFlow token:<ControlFlow_Exit exit> arg_word:{(1)})
          ]
        )
      ]
    )
    (command.Assignment
      keyword: Assign_None
      pairs: [(assign_pair lhs:(lhs_expr.LhsName name:_Dbg_script) op:Equal rhs:{(1)})]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.BoolUnary
                      op_id: BoolUnary_n
                      child: {($ VSub_DollarName '$_Dbg_EXECUTION_STRING')}
                    )
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (command.Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (lhs_expr.LhsName name:_Dbg_script_file)
                  op: Equal
                  rhs: 
                    {
                      (word_part.CommandSubPart
                        command_list: (command.CommandList children:[(C {(_Dbg_tempname)} {(cmd)})])
                        left_token: <Left_CommandSub '$('>
                      )
                    }
                )
              ]
            )
            (command.SimpleCommand
              words: [{(echo)} {(DQ ($ VSub_DollarName '$_Dbg_EXECUTION_STRING'))}]
              redirects: [
                (redir.Redir
                  op: <Redir_Great '>'>
                  fd: 16777215
                  arg_word: {($ VSub_DollarName '$_Dbg_script_file')}
                )
              ]
            )
          ]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.LogicalNot
                      child: 
                        (bool_expr.BoolUnary
                          op_id: BoolUnary_r
                          child: {(DQ ($ VSub_DollarName '$_Dbg_script_file'))}
                        )
                    )
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (command.SimpleCommand
              words: [
                {(echo)}
                {
                  (DQ (${ VSub_Name _Dbg_pname) (': cannot read program to debug: ') 
                    (${ VSub_Name _Dbg_script_file) (.)
                  )
                }
              ]
              redirects: [(redir.Redir op:<Redir_GreatAnd '>&'> fd:16777215 arg_word:{(2)})]
            )
            (command.ControlFlow token:<ControlFlow_Exit exit> arg_word:{(1)})
          ]
        )
      ]
    )
    (command.Assignment
      keyword: Assign_Typeset
      flags: [-r]
      pairs: [
        (assign_pair
          lhs: (lhs_expr.LhsName name:_Dbg_Dbg_script_file)
          op: Equal
          rhs: 
            {
              (word_part.CommandSubPart
                command_list: 
                  (command.CommandList
                    children: [(C {(_Dbg_expand_filename)} {($ VSub_DollarName '$_Dbg_script_file')})]
                  )
                left_token: <Left_CommandSub '$('>
              )
            }
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DParen
                  child: (arith_expr.ArithVarRef token:<Lit_ArithVarLike _Dbg_set_linetrace>)
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (C {(_Dbg_write_journal_eval)} {(DQ ('_Dbg_step_ignore=-1'))})
            (command.Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(lhs_expr.LhsName name:_Dbg_QUIT_ON_QUIT) op:Equal rhs:{(1)})]
            )
          ]
        )
      ]
      else_action: [(C {(_Dbg_write_journal_eval)} {(DQ ('_Dbg_step_ignore=3'))})]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.SimpleCommand
                  words: [{(enable)} {(-a)} {(set0)}]
                  redirects: [(redir.Redir op:<Redir_Great '2>'> fd:2 arg_word:{(/dev/null)})]
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [(C {(set0)} {(DQ ($ VSub_DollarName '$_Dbg_script_file'))})]
        )
      ]
    )
    (command.AndOr
      ops: [Op_DAmp]
      children: [
        (command.DParen
          child: (arith_expr.ArithVarRef token:<Lit_ArithVarLike _Dbg_set_read_completion>)
        )
        (C {(_Dbg_complete_level_0_init)})
      ]
    )
    (C {(_Dbg_init_default_traps)})
  ]
)