(CommandList
  children: [
    (Assignment
      keyword: Assign_Typeset
      pairs: [
        (assign_pair
          lhs: (LhsName name:_Dbg_bogus_file)
          op: Equal
          rhs: {(SQ <' A really bogus file'>)}
          spids: [60]
        )
      ]
      spids: [58]
    )
    (Assignment
      keyword: Assign_Typeset
      flags: [-A]
      pairs: [(assign_pair lhs:(LhsName name:_Dbg_file2canonic) op:Equal spids:[73])]
      spids: [69]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:_Dbg_file2canonic)
          op: Equal
          rhs: {(ArrayLiteralPart)}
          spids: [75]
        )
      ]
      spids: [75]
    )
    (Assignment
      keyword: Assign_Typeset
      flags: [-A]
      pairs: [(assign_pair lhs:(LhsName name:_Dbg_fileinfo) op:Equal spids:[87])]
      spids: [83]
    )
    (Assignment
      keyword: Assign_Typeset
      flags: [-A]
      pairs: [(assign_pair lhs:(LhsName name:_Dbg_filenames) op:Equal spids:[100])]
      spids: [96]
    )
    (FuncDef
      name: _Dbg_filecache_reset
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:_Dbg_filenames)
                  op: Equal
                  rhs: {(ArrayLiteralPart)}
                  spids: [110]
                )
              ]
              spids: [110]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:_Dbg_fileinfo)
                  op: Equal
                  rhs: {(ArrayLiteralPart)}
                  spids: [115]
                )
              ]
              spids: [115]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:_Dbg_file2canonic)
                  op: Equal
                  rhs: {(ArrayLiteralPart)}
                  spids: [120]
                )
              ]
              spids: [120]
            )
          ]
          spids: [107]
        )
      spids: [103 106]
    )
    (C {(_Dbg_filecache_reset)})
    (FuncDef
      name: _Dbg_check_line
      body: 
        (BraceGroup
          children: [
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DParen
                  child: 
                    (ArithBinary
                      op_id: Arith_NEqual
                      left: (ArithWord w:{($ VSub_Pound '$#')})
                      right: (ArithWord w:{(Lit_Digits 2)})
                    )
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
              ]
            )
            (Assignment
              keyword: Assign_Typeset
              flags: [-i]
              pairs: [
                (assign_pair
                  lhs: (LhsName name:line_number)
                  op: Equal
                  rhs: {($ VSub_Number '$1')}
                  spids: [164]
                )
              ]
              spids: [160]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [
                (assign_pair
                  lhs: (LhsName name:filename)
                  op: Equal
                  rhs: {(DQ ($ VSub_Number '$2'))}
                  spids: [170]
                )
              ]
              spids: [168]
            )
            (Assignment
              keyword: Assign_Typeset
              flags: [-i]
              pairs: [(assign_pair lhs:(LhsName name:max_line) op:Equal spids:[180])]
              spids: [176]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:max_line)
                  op: Equal
                  rhs: 
                    {
                      (CommandSubPart
                        command_list: 
                          (CommandList
                            children: [(C {(_Dbg_get_maxline)} {(DQ ($ VSub_Name '$filename'))})]
                          )
                        left_token: <Left_CommandSub '$('>
                        spids: [184 190]
                      )
                    }
                  spids: [183]
                )
              ]
              spids: [183]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DParen
                          child: 
                            (ArithBinary
                              op_id: Arith_NEqual
                              left: (ArithWord w:{($ VSub_QMark '$?')})
                              right: (ArithWord w:{(Lit_Digits 0)})
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(_Dbg_errmsg)} 
                      {(DQ ('internal error getting number of lines in ') ($ VSub_Name '$filename'))}
                    )
                    (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
                  ]
                  spids: [16777215 208]
                )
              ]
              spids: [16777215 224]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DParen
                          child: 
                            (ArithBinary
                              op_id: Arith_Great
                              left: (ArithVarRef name:line_number)
                              right: (ArithVarRef name:max_line)
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (AndOr
                      ops: [Op_DAmp]
                      children: [
                        (DParen child:(ArithVarRef name:_Dbg_set_basename))
                        (Assignment
                          keyword: Assign_None
                          pairs: [
                            (assign_pair
                              lhs: (LhsName name:filename)
                              op: Equal
                              rhs: 
                                {
                                  (BracedVarSub
                                    token: <VSub_Name filename>
                                    suffix_op: 
                                      (StringUnary
                                        op_id: VOp1_DPound
                                        arg_word: {('*') (Lit_Slash /)}
                                      )
                                    spids: [256 261]
                                  )
                                }
                              spids: [255]
                            )
                          ]
                          spids: [255]
                        )
                      ]
                    )
                    (C {(_Dbg_errmsg)} {(DQ ('Line ') ($ VSub_Name '$line_number') (' is too large.'))} 
                      {
                        (DQ ('File ') ($ VSub_Name '$filename') (' has only ') ($ VSub_Name '$max_line') 
                          (' lines.')
                        )
                      }
                    )
                    (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
                  ]
                  spids: [16777215 243]
                )
              ]
              spids: [16777215 288]
            )
            (ControlFlow token:<ControlFlow_Return return> arg_word:{(0)})
          ]
          spids: [139]
        )
      spids: [135 138]
    )
    (FuncDef
      name: _Dbg_file_not_read_in
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_Typeset
              flags: [-r]
              pairs: [
                (assign_pair
                  lhs: (LhsName name:filename)
                  op: Equal
                  rhs: 
                    {
                      (CommandSubPart
                        command_list: 
                          (CommandList
                            children: [(C {(_Dbg_adjust_filename)} {(DQ ($ VSub_Number '$1'))})]
                          )
                        left_token: <Left_CommandSub '$('>
                        spids: [313 319]
                      )
                    }
                  spids: [312]
                )
              ]
              spids: [308]
            )
            (C {(_Dbg_errmsg)} 
              {
                (DQ ('File ') (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>) 
                  ($ VSub_Name '$filename') (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>) (' not found in read-in files.')
                )
              }
            )
            (C {(_Dbg_errmsg)} {(DQ ("See 'info files' for a list of known files and"))})
            (C {(_Dbg_errmsg)} {(DQ ("'load' to read in a file."))})
          ]
          spids: [305]
        )
      spids: [301 304]
    )
    (FuncDef
      name: _Dbg_get_maxline
      body: 
        (BraceGroup
          children: [
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DParen
                  child: 
                    (ArithBinary
                      op_id: Arith_NEqual
                      left: (ArithWord w:{($ VSub_Pound '$#')})
                      right: (ArithWord w:{(Lit_Digits 1)})
                    )
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(-1)})
              ]
            )
            (AndOr
              ops: [Op_DPipe]
              children: [
                (C {(_Dbg_set_source_array_var)} {(DQ ($ VSub_Number '$1'))})
                (ControlFlow
                  token: <ControlFlow_Return return>
                  arg_word: {($ VSub_QMark '$?')}
                )
              ]
            )
            (Assignment
              keyword: Assign_Typeset
              flags: [-r]
              pairs: [
                (assign_pair
                  lhs: (LhsName name:line_count_cmd)
                  op: Equal
                  rhs: 
                    {
                      (DQ ('line_count=') (EscapedLiteralPart token:<Lit_EscapedChar '\\$'>) ('{#') 
                        ($ VSub_Name '$_Dbg_source_array_var') ('[@]}')
                      )
                    }
                  spids: [397]
                )
              ]
              spids: [393]
            )
            (C {(eval)} {($ VSub_Name '$line_count_cmd')})
            (C {(eval)} 
              {
                (DQ ('typeset last_line; last_line=') 
                  (EscapedLiteralPart token:<Lit_EscapedChar '\\$'>) ('{') (${ VSub_Name _Dbg_source_array_var) ('[') ($ VSub_Name '$line_count') (']}')
                )
              }
            )
            (Assignment
              keyword: Assign_Typeset
              flags: [-i]
              pairs: [(assign_pair lhs:(LhsName name:last_not_null) op:Equal rhs:{(0)} spids:[443])]
              spids: [439]
            )
            (DParen
              child: 
                (BinaryAssign
                  op_id: Arith_Equal
                  left: (LhsName name:line_count)
                  right: 
                    (ArithBinary
                      op_id: Arith_Minus
                      left: (ArithVarRef name:line_count)
                      right: (ArithVarRef name:last_line_is_null)
                    )
                )
            )
            (C {(echo)} {($ VSub_Name '$line_count')})
            (ControlFlow token:<ControlFlow_Return return> arg_word:{($ VSub_QMark '$?')})
          ]
          spids: [359]
        )
      spids: [355 358]
    )
    (FuncDef
      name: _Dbg_get_source_line
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_Typeset
              flags: [-i]
              pairs: [(assign_pair lhs:(LhsName name:lineno) op:Equal spids:[497])]
              spids: [493]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DParen
                          child: 
                            (ArithBinary
                              op_id: Arith_DEqual
                              left: (ArithWord w:{($ VSub_Pound '$#')})
                              right: (ArithWord w:{(Lit_Digits 0)})
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:lineno)
                          op: Equal
                          rhs: {($ VSub_Name '$_Dbg_frame_last_lineno')}
                          spids: [517]
                        )
                      ]
                      spids: [517]
                    )
                  ]
                  spids: [16777215 514]
                )
              ]
              else_action: [
                (Assignment
                  keyword: Assign_None
                  pairs: [
                    (assign_pair
                      lhs: (LhsName name:lineno)
                      op: Equal
                      rhs: {($ VSub_Number '$1')}
                      spids: [524]
                    )
                  ]
                  spids: [524]
                )
                (C {(shift)})
              ]
              spids: [521 531]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [(assign_pair lhs:(LhsName name:filename) op:Equal spids:[536])]
              spids: [534]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DParen
                          child: 
                            (ArithBinary
                              op_id: Arith_DEqual
                              left: (ArithWord w:{($ VSub_Pound '$#')})
                              right: (ArithWord w:{(Lit_Digits 0)})
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:filename)
                          op: Equal
                          rhs: {(DQ ($ VSub_Name '$_Dbg_frame_last_filename'))}
                          spids: [557]
                        )
                      ]
                      spids: [557]
                    )
                  ]
                  spids: [16777215 554]
                )
              ]
              else_action: [
                (Assignment
                  keyword: Assign_None
                  pairs: [
                    (assign_pair
                      lhs: (LhsName name:filename)
                      op: Equal
                      rhs: {(DQ ($ VSub_Number '$1'))}
                      spids: [566]
                    )
                  ]
                  spids: [566]
                )
              ]
              spids: [563 572]
            )
            (C {(_Dbg_readin_if_new)} {(DQ ($ VSub_Name '$filename'))})
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (AndOr
                          ops: [Op_DAmp]
                          children: [
                            (DBracket
                              expr: 
                                (BoolUnary
                                  op_id: BoolUnary_n
                                  child: {($ VSub_Name '$_Dbg_set_highlight')}
                                )
                            )
                            (DBracket
                              expr: 
                                (BoolUnary
                                  op_id: BoolUnary_n
                                  child: {($ VSub_Name '$_Dbg_highlight_array_var')}
                                )
                            )
                          ]
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(eval)} 
                      {
                        (DQ ('typeset -i count=') (EscapedLiteralPart token:<Lit_EscapedChar '\\$'>) 
                          ('{#') ($ VSub_Name '$_Dbg_highlight_array_var') ('[@]}')
                        )
                      }
                    )
                    (If
                      arms: [
                        (if_arm
                          cond: [
                            (Sentence
                              child: (DParen child:(ArithVarRef name:count))
                              terminator: <Op_Semi ';'>
                            )
                          ]
                          action: [
                            (C {(eval)} 
                              {
                                (DQ ('_Dbg_source_line=') 
                                  (EscapedLiteralPart
                                    token: <Lit_EscapedChar '\\$'>
                                  ) ('{') ($ VSub_Name '$_Dbg_highlight_array_var') ('[lineno]}')
                                )
                              }
                            )
                          ]
                          spids: [16777215 628]
                        )
                      ]
                      else_action: [
                        (C {(eval)} 
                          {
                            (DQ ('_Dbg_source_line=') 
                              (EscapedLiteralPart
                                token: <Lit_EscapedChar '\\$'>
                              ) ('{') ($ VSub_Name '$_Dbg_source_array_var') ('[') ($ VSub_Name '$lineno') (']}')
                            )
                          }
                        )
                      ]
                      spids: [642 658]
                    )
                  ]
                  spids: [16777215 603]
                )
              ]
              else_action: [
                (C {(eval)} 
                  {
                    (DQ ('_Dbg_source_line=') (EscapedLiteralPart token:<Lit_EscapedChar '\\$'>) ('{') 
                      ($ VSub_Name '$_Dbg_source_array_var') ('[') ($ VSub_Name '$lineno') (']}')
                    )
                  }
                )
              ]
              spids: [661 677]
            )
          ]
          spids: [490]
        )
      spids: [486 489]
    )
    (FuncDef
      name: _Dbg_is_file
      body: 
        (BraceGroup
          children: [
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DParen
                          child: 
                            (ArithBinary
                              op_id: Arith_DEqual
                              left: (ArithWord w:{($ VSub_Pound '$#')})
                              right: (ArithWord w:{(Lit_Digits 0)})
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(_Dbg_errmsg)} {(DQ ('Internal debug error _Dbg_is_file(): null file to find'))})
                    (C {(echo)} {(SQ )})
                    (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
                  ]
                  spids: [16777215 710]
                )
              ]
              spids: [16777215 731]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [
                (assign_pair
                  lhs: (LhsName name:find_file)
                  op: Equal
                  rhs: {(DQ ($ VSub_Number '$1'))}
                  spids: [736]
                )
              ]
              spids: [734]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [(assign_pair lhs:(LhsName name:try_find_file) op:Equal spids:[744])]
              spids: [742]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DBracket
                          expr: (BoolUnary op_id:BoolUnary_z child:{($ VSub_Name '$find_file')})
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(_Dbg_errmsg)} 
                      {(DQ ('Internal debug error _Dbg_is_file(): file argument null'))}
                    )
                    (C {(echo)} {(SQ )})
                    (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
                  ]
                  spids: [16777215 760]
                )
              ]
              spids: [16777215 781]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DBracket
                          expr: 
                            (BoolBinary
                              op_id: BoolBinary_GlobDEqual
                              left: 
                                {
                                  (BracedVarSub
                                    token: <VSub_Name find_file>
                                    suffix_op: 
                                      (Slice
                                        begin: (ArithWord w:{(Lit_Digits 0)})
                                        length: (ArithWord w:{(Lit_Digits 1)})
                                      )
                                    spids: [789 795]
                                  )
                                }
                              right: {(SQ </>)}
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:try_find_file)
                          op: Equal
                          rhs: 
                            {
                              (CommandSubPart
                                command_list: 
                                  (CommandList
                                    children: [
                                      (C {(_Dbg_expand_filename)} {(DQ ($ VSub_Name '$find_file'))})
                                    ]
                                  )
                                left_token: <Left_CommandSub '$('>
                                spids: [815 821]
                              )
                            }
                          spids: [814]
                        )
                      ]
                      spids: [814]
                    )
                    (If
                      arms: [
                        (if_arm
                          cond: [
                            (Sentence
                              child: 
                                (DBracket
                                  expr: 
                                    (BoolUnary
                                      op_id: BoolUnary_n
                                      child: 
                                        {
                                          (BracedVarSub
                                            token: <VSub_Name _Dbg_filenames>
                                            bracket_op: 
                                              (ArrayIndex
                                                expr: (ArithWord w:{($ VSub_Name '$try_find_file')})
                                              )
                                            spids: [830 835]
                                          )
                                        }
                                    )
                                )
                              terminator: <Op_Semi ';'>
                            )
                          ]
                          action: [
                            (C {(echo)} {(DQ ($ VSub_Name '$try_find_file'))})
                            (ControlFlow
                              token: <ControlFlow_Return return>
                              arg_word: {(0)}
                            )
                          ]
                          spids: [16777215 841]
                        )
                      ]
                      spids: [16777215 856]
                    )
                  ]
                  spids: [16777215 807]
                )
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DBracket
                          expr: 
                            (BoolBinary
                              op_id: BoolBinary_GlobDEqual
                              left: 
                                {
                                  (BracedVarSub
                                    token: <VSub_Name find_file>
                                    suffix_op: 
                                      (Slice
                                        begin: (ArithWord w:{(Lit_Digits 0)})
                                        length: (ArithWord w:{(Lit_Digits 1)})
                                      )
                                    spids: [863 869]
                                  )
                                }
                              right: {(SQ <.>)}
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:try_find_file)
                          op: Equal
                          rhs: 
                            {
                              (CommandSubPart
                                command_list: 
                                  (CommandList
                                    children: [
                                      (C {(_Dbg_expand_filename)} 
                                        {
                                          (DQ (${ VSub_Name _Dbg_init_cwd) (/) 
                                            ($ VSub_Name '$find_file')
                                          )
                                        }
                                      )
                                    ]
                                  )
                                left_token: <Left_CommandSub '$('>
                                spids: [889 899]
                              )
                            }
                          spids: [888]
                        )
                      ]
                      spids: [888]
                    )
                    (If
                      arms: [
                        (if_arm
                          cond: [
                            (Sentence
                              child: 
                                (DBracket
                                  expr: 
                                    (BoolUnary
                                      op_id: BoolUnary_n
                                      child: 
                                        {
                                          (BracedVarSub
                                            token: <VSub_Name _Dbg_filenames>
                                            bracket_op: 
                                              (ArrayIndex
                                                expr: (ArithWord w:{($ VSub_Name '$try_find_file')})
                                              )
                                            spids: [912 917]
                                          )
                                        }
                                    )
                                )
                              terminator: <Op_Semi ';'>
                            )
                          ]
                          action: [
                            (C {(echo)} {(DQ ($ VSub_Name '$try_find_file'))})
                            (ControlFlow
                              token: <ControlFlow_Return return>
                              arg_word: {(0)}
                            )
                          ]
                          spids: [16777215 923]
                        )
                      ]
                      spids: [16777215 938]
                    )
                  ]
                  spids: [859 881]
                )
              ]
              else_action: [
                (Assignment
                  keyword: Assign_Typeset
                  flags: [-i]
                  pairs: [
                    (assign_pair
                      lhs: (LhsName name:n)
                      op: Equal
                      rhs: 
                        {
                          (BracedVarSub
                            token: <VSub_Name _Dbg_dir>
                            prefix_op: VSub_Pound
                            bracket_op: (WholeArray op_id:Lit_At)
                            spids: [953 959]
                          )
                        }
                      spids: [952]
                    )
                  ]
                  spids: [948]
                )
                (Assignment
                  keyword: Assign_Typeset
                  flags: [-i]
                  pairs: [(assign_pair lhs:(LhsName name:i) op:Equal spids:[966])]
                  spids: [962]
                )
                (ForExpr
                  init: 
                    (BinaryAssign
                      op_id: Arith_Equal
                      left: (LhsName name:i)
                      right: (ArithWord w:{(Lit_Digits 0)})
                    )
                  cond: 
                    (ArithBinary
                      op_id: Arith_Less
                      left: (ArithVarRef name:i)
                      right: (ArithVarRef name:n)
                    )
                  update: (UnaryAssign op_id:Node_PostDPlus child:(LhsName name:i))
                  body: 
                    (DoGroup
                      children: [
                        (Assignment
                          keyword: Assign_Typeset
                          pairs: [
                            (assign_pair
                              lhs: (LhsName name:basename)
                              op: Equal
                              rhs: 
                                {
                                  (DQ 
                                    (BracedVarSub
                                      token: <VSub_Name _Dbg_dir>
                                      bracket_op: (ArrayIndex expr:(ArithVarRef name:i))
                                      spids: [1001 1006]
                                    )
                                  )
                                }
                              spids: [999]
                            )
                          ]
                          spids: [997]
                        )
                        (If
                          arms: [
                            (if_arm
                              cond: [
                                (Sentence
                                  child: 
                                    (DBracket
                                      expr: 
                                        (BoolBinary
                                          op_id: BoolBinary_GlobDEqual
                                          left: {($ VSub_Name '$basename')}
                                          right: {(SQ <'\\$cdir'>)}
                                        )
                                    )
                                  terminator: <Op_Semi ';'>
                                )
                              ]
                              action: [
                                (Assignment
                                  keyword: Assign_None
                                  pairs: [
                                    (assign_pair
                                      lhs: (LhsName name:basename)
                                      op: Equal
                                      rhs: {($ VSub_Name '$_Dbg_cdir')}
                                      spids: [1029]
                                    )
                                  ]
                                  spids: [1029]
                                )
                              ]
                              spids: [16777215 1026]
                            )
                            (if_arm
                              cond: [
                                (Sentence
                                  child: 
                                    (DBracket
                                      expr: 
                                        (BoolBinary
                                          op_id: BoolBinary_GlobDEqual
                                          left: {($ VSub_Name '$basename')}
                                          right: {(SQ <'\\$cwd'>)}
                                        )
                                    )
                                  terminator: <Op_Semi ';'>
                                )
                              ]
                              action: [
                                (Assignment
                                  keyword: Assign_None
                                  pairs: [
                                    (assign_pair
                                      lhs: (LhsName name:basename)
                                      op: Equal
                                      rhs: 
                                        {
                                          (CommandSubPart
                                            command_list: (CommandList children:[(C {(pwd)})])
                                            left_token: <Left_CommandSub '$('>
                                            spids: [1053 1055]
                                          )
                                        }
                                      spids: [1052]
                                    )
                                  ]
                                  spids: [1052]
                                )
                              ]
                              spids: [1033 1049]
                            )
                          ]
                          spids: [16777215 1058]
                        )
                        (Assignment
                          keyword: Assign_None
                          pairs: [
                            (assign_pair
                              lhs: (LhsName name:try_find_file)
                              op: Equal
                              rhs: {(DQ ($ VSub_Name '$basename') (/) ($ VSub_Name '$find_file'))}
                              spids: [1061]
                            )
                          ]
                          spids: [1061]
                        )
                        (If
                          arms: [
                            (if_arm
                              cond: [
                                (Sentence
                                  child: 
                                    (DBracket
                                      expr: 
                                        (BoolUnary
                                          op_id: BoolUnary_f
                                          child: {(DQ ($ VSub_Name '$try_find_file'))}
                                        )
                                    )
                                  terminator: <Op_Semi ';'>
                                )
                              ]
                              action: [
                                (C {(echo)} {(DQ ($ VSub_Name '$try_find_file'))})
                                (ControlFlow
                                  token: <ControlFlow_Return return>
                                  arg_word: {(0)}
                                )
                              ]
                              spids: [16777215 1083]
                            )
                          ]
                          spids: [16777215 1098]
                        )
                      ]
                      spids: [994 1101]
                    )
                )
              ]
              spids: [941 1104]
            )
            (C {(echo)} {(SQ )})
            (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
          ]
          spids: [692]
        )
      spids: [688 691]
    )
    (FuncDef
      name: _Dbg_readin
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_Typeset
              pairs: [(assign_pair lhs:(LhsName name:filename) op:Equal spids:[1144])]
              spids: [1142]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DParen
                          child: 
                            (ArithBinary
                              op_id: Arith_NEqual
                              left: (ArithWord w:{($ VSub_Pound '$#')})
                              right: (ArithWord w:{(Lit_Digits 0)})
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:filename)
                          op: Equal
                          rhs: {(DQ ($ VSub_Number '$1'))}
                          spids: [1163]
                        )
                      ]
                      spids: [1163]
                    )
                  ]
                  spids: [16777215 1160]
                )
              ]
              else_action: [
                (C {(_Dbg_frame_file)})
                (Assignment
                  keyword: Assign_None
                  pairs: [
                    (assign_pair
                      lhs: (LhsName name:filename)
                      op: Equal
                      rhs: {(DQ ($ VSub_Name '$_Dbg_frame_filename'))}
                      spids: [1175]
                    )
                  ]
                  spids: [1175]
                )
              ]
              spids: [1169 1181]
            )
            (Assignment
              keyword: Assign_Typeset
              flags: [-i]
              pairs: [(assign_pair lhs:(LhsName name:line_count) op:Equal rhs:{(0)} spids:[1189])]
              spids: [1185]
            )
            (Sentence
              child: 
                (Assignment
                  keyword: Assign_Typeset
                  flags: [-i]
                  pairs: [(assign_pair lhs:(LhsName name:next) op:Equal spids:[1198])]
                  spids: [1194]
                )
              terminator: <Op_Semi ';'>
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:next)
                  op: Equal
                  rhs: 
                    {
                      (BracedVarSub
                        token: <VSub_Name _Dbg_filenames>
                        prefix_op: VSub_Pound
                        bracket_op: (WholeArray op_id:Lit_At)
                        spids: [1203 1209]
                      )
                    }
                  spids: [1202]
                )
              ]
              spids: [1202]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:_Dbg_source_array_var)
                  op: Equal
                  rhs: {(DQ (_Dbg_source_) (${ VSub_Name next))}
                  spids: [1212]
                )
              ]
              spids: [1212]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DBracket
                          expr: 
                            (BoolUnary
                              op_id: BoolUnary_n
                              child: {($ VSub_Name '$_Dbg_set_highlight')}
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:_Dbg_highlight_array_var)
                          op: Equal
                          rhs: {(DQ (_Dbg_highlight_) (${ VSub_Name next))}
                          spids: [1236]
                        )
                      ]
                      spids: [1236]
                    )
                  ]
                  spids: [16777215 1233]
                )
              ]
              spids: [16777215 1245]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [(assign_pair lhs:(LhsName name:filevar) op:Equal spids:[1251])]
              spids: [1249]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [(assign_pair lhs:(LhsName name:source_array) op:Equal spids:[1256])]
              spids: [1254]
            )
            (Assignment
              keyword: Assign_Typeset
              flags: [-ri]
              pairs: [
                (assign_pair
                  lhs: (LhsName name:NOT_SMALLFILE)
                  op: Equal
                  rhs: {(1000)}
                  spids: [1263]
                )
              ]
              spids: [1259]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (AndOr
                          ops: [Op_DPipe]
                          children: [
                            (DBracket
                              expr: (BoolUnary op_id:BoolUnary_z child:{($ VSub_Name '$filename')})
                            )
                            (DBracket
                              expr: 
                                (BoolBinary
                                  op_id: BoolBinary_GlobDEqual
                                  left: {($ VSub_Name '$filename')}
                                  right: {(DQ ($ VSub_Name '$_Dbg_bogus_file'))}
                                )
                            )
                          ]
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(eval)} 
                      {
                        (DQ (${ VSub_Name _Dbg_source_array_var) ('[0]=') 
                          (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>) ($ VSub_Name '$Dbg_EXECUTION_STRING') (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>)
                        )
                      }
                    )
                  ]
                  spids: [16777215 1294]
                )
              ]
              else_action: [
                (Assignment
                  keyword: Assign_None
                  pairs: [
                    (assign_pair
                      lhs: (LhsName name:fullname)
                      op: Equal
                      rhs: 
                        {
                          (CommandSubPart
                            command_list: 
                              (CommandList
                                children: [
                                  (C {(_Dbg_resolve_expand_filename)} {(DQ ($ VSub_Name '$filename'))})
                                ]
                              )
                            left_token: <Left_CommandSub '$('>
                            spids: [1314 1320]
                          )
                        }
                      spids: [1313]
                    )
                  ]
                  spids: [1313]
                )
                (If
                  arms: [
                    (if_arm
                      cond: [
                        (Sentence
                          child: 
                            (DBracket
                              expr: (BoolUnary op_id:BoolUnary_r child:{($ VSub_Name '$fullname')})
                            )
                          terminator: <Op_Semi ';'>
                        )
                      ]
                      action: [
                        (Assignment
                          keyword: Assign_Typeset
                          flags: [-r]
                          pairs: [
                            (assign_pair
                              lhs: (LhsName name:progress_prefix)
                              op: Equal
                              rhs: {(DQ ('Reading ') ($ VSub_Name '$filename'))}
                              spids: [1342]
                            )
                          ]
                          spids: [1338]
                        )
                        (C 
                          {(_Dbg_file2canonic) (Lit_Other '[') ($ VSub_Name '$filename') 
                            (Lit_Other ']') (Lit_Other '=') (DQ ($ VSub_Name '$fullname'))
                          }
                        )
                        (C 
                          {(_Dbg_file2canonic) (Lit_Other '[') ($ VSub_Name '$fullname') 
                            (Lit_Other ']') (Lit_Other '=') (DQ ($ VSub_Name '$fullname'))
                          }
                        )
                        (Assignment
                          keyword: Assign_Typeset
                          flags: [-ri]
                          pairs: [
                            (assign_pair
                              lhs: (LhsName name:BIGFILE)
                              op: Equal
                              rhs: {(30000)}
                              spids: [1377]
                            )
                          ]
                          spids: [1373]
                        )
                        (If
                          arms: [
                            (if_arm
                              cond: [
                                (Sentence
                                  child: 
                                    (SimpleCommand
                                      words: [{(wc)} {(-l)}]
                                      redirects: [
                                        (Redir
                                          op_id: Redir_Less
                                          fd: 16777215
                                          arg_word: {(/dev/null)}
                                          spids: [1387]
                                        )
                                        (Redir
                                          op_id: Redir_Great
                                          fd: 16777215
                                          arg_word: {(/dev/null)}
                                          spids: [1391]
                                        )
                                        (Redir
                                          op_id: Redir_GreatAnd
                                          fd: 2
                                          arg_word: {(1)}
                                          spids: [1394]
                                        )
                                      ]
                                    )
                                  terminator: <Op_Semi ';'>
                                )
                              ]
                              action: [
                                (Assignment
                                  keyword: Assign_None
                                  pairs: [
                                    (assign_pair
                                      lhs: (LhsName name:line_count)
                                      op: Equal
                                      rhs: 
                                        {
                                          (CommandSubPart
                                            command_list: 
                                              (CommandList
                                                children: [
                                                  (SimpleCommand
                                                    words: [{(wc)} {(-l)}]
                                                    redirects: [
                                                      (Redir
                                                        op_id: Redir_Less
                                                        fd: 16777215
                                                        arg_word: {(DQ (${ VSub_Name fullname))}
                                                        spids: [1408]
                                                      )
                                                    ]
                                                  )
                                                ]
                                              )
                                            left_token: <Left_CommandSub '$('>
                                            spids: [1403 1415]
                                          )
                                        }
                                      spids: [1402]
                                    )
                                  ]
                                  spids: [1402]
                                )
                                (If
                                  arms: [
                                    (if_arm
                                      cond: [
                                        (Sentence
                                          child: 
                                            (DParen
                                              child: 
                                                (ArithBinary
                                                  op_id: Arith_GreatEqual
                                                  left: (ArithVarRef name:line_count)
                                                  right: (ArithVarRef name:NOT_SMALLFILE)
                                                )
                                            )
                                          terminator: <Op_Semi ';'>
                                        )
                                      ]
                                      action: [
                                        (C {(_Dbg_msg_nocr)} {(DQ (${ VSub_Name progress_prefix) (' '))})
                                      ]
                                      spids: [16777215 1433]
                                    )
                                  ]
                                  spids: [16777215 1446]
                                )
                              ]
                              spids: [16777215 1399]
                            )
                          ]
                          spids: [16777215 1449]
                        )
                        (SimpleCommand
                          words: [
                            {(builtin)}
                            {(readarray)}
                            {(-t)}
                            {(-O)}
                            {(1)}
                            {(-c)}
                            {($ VSub_Name '$BIGFILE')}
                            {(-C)}
                            {
                              (DQ ('_Dbg_progess_show ') 
                                (EscapedLiteralPart
                                  token: <Lit_EscapedChar '\\"'>
                                ) (${ VSub_Name progress_prefix) (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>) (' ') 
                                (${ VSub_Name line_count)
                              )
                            }
                            {($ VSub_Name '$_Dbg_source_array_var')}
                          ]
                          redirects: [
                            (Redir
                              op_id: Redir_Less
                              fd: 16777215
                              arg_word: {(DQ ($ VSub_Name '$fullname'))}
                              spids: [1487]
                            )
                          ]
                        )
                        (If
                          arms: [
                            (if_arm
                              cond: [
                                (Sentence
                                  child: 
                                    (DBracket
                                      expr: 
                                        (BoolUnary
                                          op_id: BoolUnary_n
                                          child: {($ VSub_Name '$_Dbg_set_highlight')}
                                        )
                                    )
                                  terminator: <Op_Semi ';'>
                                )
                              ]
                              action: [
                                (Assignment
                                  keyword: Assign_None
                                  pairs: [
                                    (assign_pair
                                      lhs: (LhsName name:opts)
                                      op: Equal
                                      rhs: {(DQ ('--bg=') (${ VSub_Name _Dbg_set_highlight))}
                                      spids: [1509]
                                    )
                                  ]
                                  spids: [1509]
                                )
                                (If
                                  arms: [
                                    (if_arm
                                      cond: [
                                        (Sentence
                                          child: 
                                            (DBracket
                                              expr: 
                                                (BoolUnary
                                                  op_id: BoolUnary_n
                                                  child: {($ VSub_Name '$_Dbg_set_style')}
                                                )
                                            )
                                          terminator: <Op_Semi ';'>
                                        )
                                      ]
                                      action: [
                                        (Assignment
                                          keyword: Assign_None
                                          pairs: [
                                            (assign_pair
                                              lhs: (LhsName name:opts)
                                              op: Equal
                                              rhs: {(DQ ('--style=') (${ VSub_Name _Dbg_set_style))}
                                              spids: [1533]
                                            )
                                          ]
                                          spids: [1533]
                                        )
                                      ]
                                      spids: [16777215 1530]
                                    )
                                  ]
                                  spids: [16777215 1542]
                                )
                                (Assignment
                                  keyword: Assign_None
                                  pairs: [
                                    (assign_pair
                                      lhs: (LhsName name:highlight_cmd)
                                      op: Equal
                                      rhs: 
                                        {
                                          (DQ (${ VSub_Name _Dbg_libdir) ('/lib/term-highlight.py ') 
                                            ($ VSub_Name '$opts') (' ') ($ VSub_Name '$fullname')
                                          )
                                        }
                                      spids: [1545]
                                    )
                                  ]
                                  spids: [1545]
                                )
                                (Assignment
                                  keyword: Assign_None
                                  pairs: [
                                    (assign_pair
                                      lhs: (LhsName name:tempfile)
                                      op: Equal
                                      rhs: 
                                        {
                                          (CommandSubPart
                                            command_list: 
                                              (CommandList
                                                children: [
                                                  (SimpleCommand
                                                    words: [{($ VSub_Name '$highlight_cmd')}]
                                                    redirects: [
                                                      (Redir
                                                        op_id: Redir_Great
                                                        fd: 2
                                                        arg_word: {(/dev/null)}
                                                        spids: [1561]
                                                      )
                                                    ]
                                                  )
                                                ]
                                              )
                                            left_token: <Left_CommandSub '$('>
                                            spids: [1558 1563]
                                          )
                                        }
                                      spids: [1557]
                                    )
                                  ]
                                  spids: [1557]
                                )
                                (If
                                  arms: [
                                    (if_arm
                                      cond: [
                                        (Sentence
                                          child: 
                                            (DParen
                                              child: 
                                                (ArithBinary
                                                  op_id: Arith_DEqual
                                                  left: (ArithWord w:{(Lit_Digits 0)})
                                                  right: (ArithWord w:{($ VSub_QMark '$?')})
                                                )
                                            )
                                          terminator: <Op_Semi ';'>
                                        )
                                      ]
                                      action: [
                                        (SimpleCommand
                                          words: [
                                            {(builtin)}
                                            {(readarray)}
                                            {(-t)}
                                            {(-O)}
                                            {(1)}
                                            {(-c)}
                                            {($ VSub_Name '$BIGFILE')}
                                            {(-C)}
                                            {
                                              (DQ ('_Dbg_progess_show ') 
                                                (EscapedLiteralPart
                                                  token: <Lit_EscapedChar '\\"'>
                                                ) (${ VSub_Name progress_prefix) (EscapedLiteralPart token:<Lit_EscapedChar '\\"'>) (' ') 
                                                (${ VSub_Name line_count)
                                              )
                                            }
                                            {($ VSub_Name '$_Dbg_highlight_array_var')}
                                          ]
                                          redirects: [
                                            (Redir
                                              op_id: Redir_Less
                                              fd: 16777215
                                              arg_word: {(DQ ($ VSub_Name '$tempfile'))}
                                              spids: [1619]
                                            )
                                          ]
                                        )
                                      ]
                                      spids: [16777215 1581]
                                    )
                                  ]
                                  spids: [16777215 1626]
                                )
                                (AndOr
                                  ops: [Op_DAmp]
                                  children: [
                                    (DBracket
                                      expr: 
                                        (BoolUnary
                                          op_id: BoolUnary_r
                                          child: {($ VSub_Name '$tempfile')}
                                        )
                                    )
                                    (C {(rm)} {($ VSub_Name '$tempfile')})
                                  ]
                                )
                              ]
                              spids: [16777215 1506]
                            )
                          ]
                          spids: [16777215 1644]
                        )
                        (AndOr
                          ops: [Op_DAmp]
                          children: [
                            (DParen
                              child: 
                                (ArithBinary
                                  op_id: Arith_Great
                                  left: (ArithVarRef name:line_count)
                                  right: (ArithVarRef name:BIGFILE)
                                )
                            )
                            (C {(_Dbg_progess_done)})
                          ]
                        )
                      ]
                      spids: [16777215 1335]
                    )
                  ]
                  else_action: [(ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})]
                  spids: [1662 1670]
                )
              ]
              spids: [1310 1673]
            )
            (Assignment
              keyword: Assign_Typeset
              flags: [-r]
              pairs: [
                (assign_pair
                  lhs: (LhsName name:line_count_cmd)
                  op: Equal
                  rhs: 
                    {
                      (DQ ('line_count=') (EscapedLiteralPart token:<Lit_EscapedChar '\\$'>) ('{#') 
                        (BracedVarSub
                          token: <VSub_Name _Dbg_source_array_var>
                          bracket_op: (WholeArray op_id:Lit_At)
                          spids: [1686 1691]
                        ) ('}')
                      )
                    }
                  spids: [1681]
                )
              ]
              spids: [1677]
            )
            (C {(eval)} {($ VSub_Name '$line_count_cmd')})
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DParen
                  child: 
                    (ArithBinary
                      op_id: Arith_GreatEqual
                      left: (ArithVarRef name:line_count)
                      right: (ArithVarRef name:NOT_SMALLFILE)
                    )
                )
                (C {(_Dbg_msg)} {(DQ (done.))})
              ]
            )
            (Sentence
              child: 
                (C 
                  {(_Dbg_filenames) (Lit_Other '[') ($ VSub_Name '$fullname') (Lit_Other ']') 
                    (Lit_Other '=') ($ VSub_Name '$_Dbg_source_array_var')
                  }
                )
              terminator: <Op_Semi ';'>
            )
            (ControlFlow token:<ControlFlow_Return return> arg_word:{(0)})
          ]
          spids: [1139]
        )
      spids: [1135 1138]
    )
    (FuncDef
      name: _Dbg_readin_if_new
      body: 
        (BraceGroup
          children: [
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DParen
                  child: 
                    (ArithBinary
                      op_id: Arith_NEqual
                      left: (ArithWord w:{($ VSub_Pound '$#')})
                      right: (ArithWord w:{(Lit_Digits 1)})
                    )
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
              ]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [
                (assign_pair
                  lhs: (LhsName name:filename)
                  op: Equal
                  rhs: {(DQ ($ VSub_Number '$1'))}
                  spids: [1776]
                )
              ]
              spids: [1774]
            )
            (C {(_Dbg_set_source_array_var)} {(DQ ($ VSub_Name '$filename'))})
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DBracket
                          expr: (BoolUnary op_id:BoolUnary_z child:{(DQ ($ VSub_Name '$fullname'))})
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (C {(_Dbg_readin)} {(DQ ($ VSub_Name '$filename'))})
                    (Assignment
                      keyword: Assign_Typeset
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:rc)
                          op: Equal
                          rhs: {($ VSub_QMark '$?')}
                          spids: [1815]
                        )
                      ]
                      spids: [1813]
                    )
                    (C {(set)} {(Lit_Other '+') (xv)})
                    (AndOr
                      ops: [Op_DAmp]
                      children: [
                        (DParen
                          child: 
                            (ArithBinary
                              op_id: Arith_NEqual
                              left: (ArithWord w:{($ VSub_QMark '$?')})
                              right: (ArithWord w:{(Lit_Digits 0)})
                            )
                        )
                        (ControlFlow
                          token: <ControlFlow_Return return>
                          arg_word: {($ VSub_Name '$rc')}
                        )
                      ]
                    )
                    (AndOr
                      ops: [Op_DAmp]
                      children: [
                        (DBracket
                          expr: (BoolUnary op_id:BoolUnary_z child:{($ VSub_Name '$fullname')})
                        )
                        (ControlFlow
                          token: <ControlFlow_Return return>
                          arg_word: {(1)}
                        )
                      ]
                    )
                    (AndOr
                      ops: [Op_DPipe]
                      children: [
                        (C {(_Dbg_set_source_array_var)} {(DQ ($ VSub_Name '$filename'))})
                        (ControlFlow
                          token: <ControlFlow_Return return>
                          arg_word: {($ VSub_QMark '$?')}
                        )
                      ]
                    )
                  ]
                  spids: [16777215 1803]
                )
              ]
              spids: [16777215 1871]
            )
            (ControlFlow token:<ControlFlow_Return return> arg_word:{(0)})
          ]
          spids: [1753]
        )
      spids: [1749 1752]
    )
    (FuncDef
      name: _Dbg_set_source_array_var
      body: 
        (BraceGroup
          children: [
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DParen
                  child: 
                    (ArithBinary
                      op_id: Arith_NEqual
                      left: (ArithWord w:{($ VSub_Pound '$#')})
                      right: (ArithWord w:{(Lit_Digits 1)})
                    )
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
              ]
            )
            (Assignment
              keyword: Assign_Typeset
              pairs: [
                (assign_pair
                  lhs: (LhsName name:filename)
                  op: Equal
                  rhs: {(DQ ($ VSub_Number '$1'))}
                  spids: [1917]
                )
              ]
              spids: [1915]
            )
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DBracket
                  expr: (BoolUnary op_id:BoolUnary_z child:{($ VSub_Name '$filename')})
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(2)})
              ]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:fullname)
                  op: Equal
                  rhs: 
                    {
                      (BracedVarSub
                        token: <VSub_Name _Dbg_file2canonic>
                        bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$filename')}))
                        spids: [1939 1944]
                      )
                    }
                  spids: [1938]
                )
              ]
              spids: [1938]
            )
            (AndOr
              ops: [Op_DAmp Op_DAmp]
              children: [
                (DBracket
                  expr: (BoolUnary op_id:BoolUnary_z child:{($ VSub_Name '$fullname')})
                )
                (DBracket
                  expr: 
                    (BoolUnary
                      op_id: BoolUnary_n
                      child: 
                        {
                          (BracedVarSub
                            token: <VSub_Name _Dbg_filenames>
                            bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$filename')}))
                            spids: [1961 1966]
                          )
                        }
                    )
                )
                (BraceGroup
                  children: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:fullname)
                          op: Equal
                          rhs: {(DQ ($ VSub_Name '$filename'))}
                          spids: [1975]
                        )
                      ]
                      spids: [1975]
                    )
                  ]
                  spids: [1972]
                )
              ]
            )
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DBracket
                  expr: (BoolUnary op_id:BoolUnary_z child:{($ VSub_Name '$fullname')})
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(2)})
              ]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:_Dbg_source_array_var)
                  op: Equal
                  rhs: 
                    {
                      (BracedVarSub
                        token: <VSub_Name _Dbg_filenames>
                        bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$fullname')}))
                        spids: [2000 2005]
                      )
                    }
                  spids: [1999]
                )
              ]
              spids: [1999]
            )
            (If
              arms: [
                (if_arm
                  cond: [
                    (Sentence
                      child: 
                        (DBracket
                          expr: 
                            (BoolUnary
                              op_id: BoolUnary_n
                              child: {($ VSub_Name '$_Dbg_set_highlight')}
                            )
                        )
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:_Dbg_highlight_array_var)
                          op: Equal
                          rhs: 
                            {
                              (DQ 
                                (BracedVarSub
                                  token: <VSub_Name _Dbg_source_array_var>
                                  suffix_op: 
                                    (PatSub
                                      pat: {(_Dbg_source_)}
                                      replace: {(_Dbg_highlight_)}
                                      do_all: F
                                      do_prefix: F
                                      do_suffix: F
                                    )
                                  spids: [2025 2031]
                                )
                              )
                            }
                          spids: [2023]
                        )
                      ]
                      spids: [2023]
                    )
                  ]
                  spids: [16777215 2020]
                )
              ]
              spids: [16777215 2035]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:_Dbg_source_array_var)
                  op: Equal
                  rhs: 
                    {
                      (BracedVarSub
                        token: <VSub_Name _Dbg_filenames>
                        bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$fullname')}))
                        spids: [2039 2044]
                      )
                    }
                  spids: [2038]
                )
              ]
              spids: [2038]
            )
            (AndOr
              ops: [Op_DAmp]
              children: [
                (DBracket
                  expr: (BoolUnary op_id:BoolUnary_z child:{($ VSub_Name '$_Dbg_source_array_var')})
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(2)})
              ]
            )
            (ControlFlow token:<ControlFlow_Return return> arg_word:{(0)})
          ]
          spids: [1894]
        )
      spids: [1890 1893]
    )
  ]
)