(command.CommandList
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      blame_tok: <typeset>
      more_env: []
      words: [{<typeset>} {<-i>} {<_Dbg_stack_size>}]
      redirects: []
      do_fork: T
    )
    (command.Simple
      blame_tok: <typeset>
      more_env: []
      words: [{<typeset>} {<-i>} {<_Dbg_stack_pos>}]
      redirects: []
      do_fork: T
    )
    (command.Simple
      blame_tok: <typeset>
      more_env: []
      words: [{<typeset>} {<Id.Lit_VarLike '_Dbg_frame_last_filename='> (SQ )}]
      redirects: []
      do_fork: T
    )
    (command.Simple
      blame_tok: <typeset>
      more_env: []
      words: [{<typeset>} {<-i>} {<Id.Lit_VarLike '_Dbg_frame_last_lineno='> <0>}]
      redirects: []
      do_fork: T
    )
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      name_tok: <_Dbg_frame_adjust>
      name: _Dbg_frame_adjust
      body: 
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          children: [
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                (command.DParen
                  left: <Id.Op_DLeftParen _>
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_NEqual
                      left: {($ Id.VSub_Pound '#')}
                      right: {<Id.Lit_Digits 2>}
                    )
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                  redirects: []
                )
                (command.ControlFlow
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                  arg_word: {<255>}
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<Id.Lit_VarLike 'count='> ($ Id.VSub_Number 1)}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<Id.Lit_VarLike 'signum='> ($ Id.VSub_Number 2)}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<retval>}]
              redirects: []
              do_fork: T
            )
            (command.AndOr
              children: [
                (command.Simple
                  blame_tok: <_Dbg_frame_int_setup>
                  more_env: []
                  words: [{<_Dbg_frame_int_setup>} {($ Id.VSub_DollarName count)}]
                  redirects: []
                  do_fork: T
                )
                (command.ControlFlow
                  keyword: <Id.ControlFlow_Return return>
                  arg_word: {<2>}
                )
              ]
              ops: [<Id.Op_DPipe _>]
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<pos>}]
              redirects: []
              do_fork: T
            )
            (command.If
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              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
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                            (command.DParen
                              left: <Id.Op_DLeftParen _>
                              child: 
                                (arith_expr.Binary
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                                  left: ($ Id.Lit_ArithVarLike signum)
                                  right: {<Id.Lit_Digits 0>}
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                              right: <Id.Op_DRightParen _>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.If
                      if_kw: <Id.KW_If if>
                      arms: [
                        (IfArm
                          keyword: <Id.KW_If if>
                          cond: 
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                                  child: 
                                    (command.DParen
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                                      child: 
                                        (arith_expr.Binary
                                          op_id: Id.Arith_Less
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                                          right: {<Id.Lit_Digits 0>}
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                                      redirects: []
                                    )
                                  terminator: <Id.Op_Semi _>
                                )
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                            )
                          then_kw: <Id.KW_Then then>
                          action: [
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                              left: <Id.Op_DLeftParen _>
                              child: 
                                (arith_expr.BinaryAssign
                                  op_id: Id.Arith_Equal
                                  left: ($ Id.Lit_ArithVarLike pos)
                                  right: 
                                    (arith_expr.Binary
                                      op_id: Id.Arith_Minus
                                      left: 
                                        (arith_expr.Binary
                                          op_id: Id.Arith_Plus
                                          left: ($ Id.Lit_ArithVarLike _Dbg_stack_size)
                                          right: ($ Id.Lit_ArithVarLike count)
                                        )
                                      right: {<Id.Lit_Digits 1>}
                                    )
                                )
                              right: <Id.Op_DRightParen _>
                              redirects: []
                            )
                          ]
                          spids: [219 234]
                        )
                      ]
                      else_kw: <Id.KW_Else else>
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                          child: 
                            (arith_expr.BinaryAssign
                              op_id: Id.Arith_Equal
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                              right: ($ Id.Lit_ArithVarLike count)
                            )
                          right: <Id.Op_DRightParen _>
                          redirects: []
                        )
                      ]
                      fi_kw: <Id.KW_Fi fi>
                      redirects: []
                    )
                  ]
                  spids: [203 216]
                )
              ]
              else_kw: <Id.KW_Else else>
              else_action: [
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                  left: <Id.Op_DLeftParen _>
                  child: 
                    (arith_expr.BinaryAssign
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                      left: ($ Id.Lit_ArithVarLike pos)
                      right: 
                        (arith_expr.Binary
                          op_id: Id.Arith_Plus
                          left: ($ Id.Lit_ArithVarLike _Dbg_stack_pos)
                          right: 
                            (arith_expr.Binary
                              op_id: Id.Arith_Star
                              left: ($ Id.Lit_ArithVarLike count)
                              right: ($ Id.Lit_ArithVarLike signum)
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                        )
                    )
                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
              ]
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.If
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              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
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                          child: 
                            (command.DParen
                              left: <Id.Op_DLeftParen _>
                              child: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_Less
                                  left: ($ Id.Lit_ArithVarLike pos)
                                  right: {<Id.Lit_Digits 0>}
                                )
                              right: <Id.Op_DRightParen _>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <_Dbg_errmsg>
                      more_env: []
                      words: [
                        {<_Dbg_errmsg>}
                        {(SQ <'Would be beyond bottom-most (most recent) entry.'>)}
                      ]
                      redirects: []
                      do_fork: T
                    )
                    (command.ControlFlow
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                      arg_word: {<1>}
                    )
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                  spids: [292 307]
                )
                (IfArm
                  keyword: <Id.KW_Elif elif>
                  cond: 
                    (condition.Shell
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                                (arith_expr.Binary
                                  op_id: Id.Arith_GreatEqual
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                                  right: 
                                    (arith_expr.Binary
                                      op_id: Id.Arith_Minus
                                      left: ($ Id.Lit_ArithVarLike _Dbg_stack_size)
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                                )
                              right: <Id.Op_DRightParen _>
                              redirects: []
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                        )
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                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <_Dbg_errmsg>
                      more_env: []
                      words: [{<_Dbg_errmsg>} {(SQ <'Would be beyond top-most (least recent) entry.'>)}]
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                      do_fork: T
                    )
                    (command.ControlFlow
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                      arg_word: {<1>}
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                  spids: [323 342]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<adjusted_pos>}]
              redirects: []
              do_fork: T
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'adjusted_pos='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'adjusted_pos='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'adjusted_pos='> name:adjusted_pos)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (CommandSub
                        left_token: <Id.Left_DollarParen '$('>
                        child: 
                          (command.Simple
                            blame_tok: <_Dbg_frame_adjusted_pos>
                            more_env: []
                            words: [{<_Dbg_frame_adjusted_pos>} {($ Id.VSub_DollarName pos)}]
                            redirects: []
                            do_fork: T
                          )
                        right: <Id.Eof_RParen _>
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.ShAssignment
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              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike '_Dbg_stack_pos='>
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              ]
              redirects: []
            )
            (command.ShAssignment
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              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike '_Dbg_listline='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike '_Dbg_listline='> name:_Dbg_listline)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (BracedVarSub
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                          var_name: BASH_LINENO
                          bracket_op: 
                            (bracket_op.ArrayIndex
                              expr: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_Minus
                                  left: ($ Id.Lit_ArithVarLike adjusted_pos)
                                  right: {<Id.Lit_Digits 1>}
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                            )
                          right: <Id.Right_DollarBrace '}'>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.ShAssignment
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              pairs: [
                (AssignPair
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                  lhs: 
                    (sh_lhs_expr.Name
                      left: <Id.Lit_VarLike '_Dbg_frame_last_filename='>
                      name: _Dbg_frame_last_filename
                    )
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (BracedVarSub
                          left: <Id.Left_DollarBrace '${'>
                          token: <Id.VSub_Name BASH_SOURCE>
                          var_name: BASH_SOURCE
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                            (bracket_op.ArrayIndex
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                          right: <Id.Right_DollarBrace '}'>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.Sentence
              child: 
                (command.Simple
                  blame_tok: <typeset>
                  more_env: []
                  words: [{<typeset>} {<filename>}]
                  redirects: []
                  do_fork: T
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              terminator: <Id.Op_Semi _>
            )
            (command.ShAssignment
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              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'filename='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'filename='> name:filename)
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                    {
                      (DQ 
                        (CommandSub
                          left_token: <Id.Left_DollarParen '$('>
                          child: 
                            (command.Simple
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                              more_env: []
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                                {<_Dbg_file_canonic>}
                                {(DQ ($ Id.VSub_DollarName _Dbg_frame_last_filename))}
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                              redirects: []
                              do_fork: T
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                          right: <Id.Eof_RParen _>
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                      )
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                )
              ]
              redirects: []
            )
            (command.Simple
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              more_env: []
              words: [
                {<_Dbg_frame_print>}
                {(SQ <'->'>)}
                {($ Id.VSub_DollarName _Dbg_stack_pos)}
                {(SQ )}
                {(DQ ($ Id.VSub_DollarName filename))}
                {($ Id.VSub_DollarName _Dbg_listline)}
                {(SQ )}
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              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <_Dbg_print_location_and_command>
              more_env: []
              words: [{<_Dbg_print_location_and_command>} {(DQ ($ Id.VSub_DollarName _Dbg_listline))}]
              redirects: []
              do_fork: T
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            (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
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    )
    (command.ShFunction
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      name: _Dbg_frame_file
      body: 
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            (command.Simple
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              more_env: []
              words: [
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                {<-i>}
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                  (BracedVarSub
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                      (suffix_op.Unary
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              ]
              redirects: []
              do_fork: T
            )
            (command.Simple
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              more_env: []
              words: [
                {<typeset>}
                {<-i>}
                {<Id.Lit_VarLike 'basename_only='> 
                  (BracedVarSub
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                    var_name: 2
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                      (suffix_op.Unary
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              ]
              redirects: []
              do_fork: T
            )
            (command.ShAssignment
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              pairs: [
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                  lhs: 
                    (sh_lhs_expr.Name
                      left: <Id.Lit_VarLike '_Dbg_frame_filename='>
                      name: _Dbg_frame_filename
                    )
                  op: assign_op.Equal
                  rhs: 
                    {
                      (BracedVarSub
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                        token: <Id.VSub_Name BASH_SOURCE>
                        var_name: BASH_SOURCE
                        bracket_op: (bracket_op.ArrayIndex expr:($ Id.Lit_ArithVarLike pos))
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                )
              ]
              redirects: []
            )
            (command.AndOr
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                  redirects: []
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                (command.ShAssignment
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                        (sh_lhs_expr.Name
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                      op: assign_op.Equal
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                        {
                          (BracedVarSub
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                            var_name: _Dbg_frame_filename
                            suffix_op: 
                              (suffix_op.Unary
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                                arg_word: {<Id.Lit_Other '*'> <Id.Lit_Slash '/'>}
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                            right: <Id.Right_DollarBrace '}'>
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                        }
                    )
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                  redirects: []
                )
              ]
              ops: [<Id.Op_DAmp _>]
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            (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})
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          redirects: []
          right: <Id.Lit_RBrace '}'>
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    )
    (command.ShFunction
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      name: _Dbg_frame_int_setup
      body: 
        (BraceGroup
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          children: [
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                (command.Simple
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                  more_env: []
                  words: [{<_Dbg_not_running>}]
                  redirects: []
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              ops: [<Id.Op_DAmp _>]
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            (command.Simple
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              more_env: []
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              redirects: []
              do_fork: T
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                (IfArm
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                    (condition.Shell
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                                (bool_expr.LogicalAnd
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                                      right: {(SQ )}
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                                  right: 
                                    (bool_expr.Binary
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                                      right: {($ Id.VSub_DollarName _Dbg_signed_int_pat)}
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                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
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                    )
                  then_kw: <Id.KW_Then then>
                  action: [
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                      more_env: []
                      words: [{<_Dbg_errmsg>} {(DQ <'Bad integer parameter: '> ($ Id.VSub_Number 1))}]
                      redirects: []
                      do_fork: T
                    )
                    (command.Simple
                      blame_tok: <eval>
                      more_env: []
                      words: [{<eval>} {(DQ ($ Id.VSub_DollarName _resteglob))}]
                      redirects: []
                      do_fork: T
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                    (command.ControlFlow
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                      arg_word: {<1>}
                    )
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                  spids: [608 631]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.Simple
              blame_tok: <eval>
              more_env: []
              words: [{<eval>} {(DQ ($ Id.VSub_DollarName _resteglob))}]
              redirects: []
              do_fork: T
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
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      name_tok: <_Dbg_frame_adjusted_pos>
      name: _Dbg_frame_adjusted_pos
      body: 
        (BraceGroup
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          children: [
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                  keyword: <Id.KW_If if>
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                    (condition.Shell
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                              child: 
                                (arith_expr.Binary
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                                  left: {($ Id.VSub_Pound '#')}
                                  right: {<Id.Lit_Digits 1>}
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                              right: <Id.Op_DRightParen _>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <echo>
                      more_env: []
                      words: [{<echo>} {<-n>} {(SQ <-1>)}]
                      redirects: []
                      do_fork: T
                    )
                    (command.ControlFlow
                      keyword: <Id.ControlFlow_Return return>
                      arg_word: {<1>}
                    )
                  ]
                  spids: [684 697]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<pos>}]
              redirects: []
              do_fork: T
            )
            (command.DParen
              left: <Id.Op_DLeftParen _>
              child: 
                (arith_expr.BinaryAssign
                  op_id: Id.Arith_Equal
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                      left: <Id.Lit_VarLike 'callstr='>
                      lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'callstr='> name:callstr)
                      op: assign_op.Equal
                      rhs: 
                        {(DQ ($ Id.VSub_DollarName callstr) <'('> ($ Id.VSub_DollarName args) <')'>)}
                    )
                  ]
                  redirects: []
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <_Dbg_msg>
              more_env: []
              words: [
                {<_Dbg_msg>}
                {
                  (DQ ($ Id.VSub_DollarName prefix) ($ Id.VSub_DollarName pos) <' in file '> 
                    (word_part.EscapedLiteral
                      token: <Id.Lit_EscapedChar '\\`'>
                      ch: '`'
                    ) ($ Id.VSub_DollarName filename) <'\' at line '> ($ Id.VSub_DollarName line)
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
  ]
)