(command.CommandList
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      ops: [Id.Op_DAmp]
      children: [
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          {
            (braced_var_sub
              token: <Id.VSub_Name VARIABLES_LINKEDLIST_SH>
              suffix_op: (suffix_op.Unary op_id:Id.VTest_Plus arg_word:{<true>})
            )
          } {<Id.Lit_RBracket ']'>}
        )
        (command.ControlFlow token:<Id.ControlFlow_Return return>)
      ]
    )
    (C {<declare>} {<-g>} {<Id.Lit_VarLike 'VARIABLES_LINKEDLIST_SH='> <true>})
    (C {<.>} 
      {
        (braced_var_sub
          token: <Id.VSub_Name BASH_SOURCE>
          suffix_op: (suffix_op.Unary op_id:Id.VOp1_Percent arg_word:{<Id.Lit_Slash /> <'*'>})
        ) </common.sh>
      }
    )
    (C {<.>} 
      {
        (braced_var_sub
          token: <Id.VSub_Name BASH_SOURCE>
          suffix_op: (suffix_op.Unary op_id:Id.VOp1_Percent arg_word:{<Id.Lit_Slash /> <'*'>})
        ) </logger.sh>
      }
    )
    (C {<.>} 
      {
        (braced_var_sub
          token: <Id.VSub_Name BASH_SOURCE>
          suffix_op: (suffix_op.Unary op_id:Id.VOp1_Percent arg_word:{<Id.Lit_Slash /> <'*'>})
        ) </variables.sh>
      }
    )
    (C {<.>} 
      {
        (braced_var_sub
          token: <Id.VSub_Name BASH_SOURCE>
          suffix_op: (suffix_op.Unary op_id:Id.VOp1_Percent arg_word:{<Id.Lit_Slash /> <'*'>})
        ) </variables.atom.sh>
      }
    )
    (C 
      {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <type> <Id.Lit_Other ':'> <Id.Lit_Other ':'> 
        <define>
      } {<LinkedList>}
    )
    (command.ShFunction
      name: 'variable::LinkedList::new'
      body: 
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          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DBracket
                          expr: 
                            (bool_expr.Binary
                              op_id: Id.BoolBinary_GlobDEqual
                              left: {(${ Id.VSub_Name VARIABLES_DEBUG)}
                              right: {<1>}
                            )
                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.Sentence
                      child: (C {<stderr>} {(DQ <'variable::LinkedList::new '> (${ Id.VSub_At '@'))})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  spids: [157 172]
                )
              ]
            )
            (C {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <new>} {<LinkedList>} 
              {(DQ (${ Id.VSub_At '@'))}
            )
          ]
        )
    )
    (command.ShFunction
      name: 'variable::LinkedList::append'
      body: 
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          children: [
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              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DBracket
                          expr: 
                            (bool_expr.Binary
                              op_id: Id.BoolBinary_GlobDEqual
                              left: {(${ Id.VSub_Name VARIABLES_DEBUG)}
                              right: {<1>}
                            )
                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.Sentence
                      child: (C {<stderr>} {(DQ <'variable::LinkedList::append '> (${ Id.VSub_At '@'))})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  spids: [234 249]
                )
              ]
            )
            (C {<declare>} {<Id.Lit_VarLike 'list_token='> ($ Id.VSub_Number '$1')})
            (C {<declare>} {<Id.Lit_VarLike 'value_token='> ($ Id.VSub_Number '$2')})
            (C 
              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <type> <Id.Lit_Other ':'> 
                <Id.Lit_Other ':'> <instanceOfOrExit>
              } {(DQ (${ Id.VSub_Name list_token))} {<LinkedList>}
            )
            (C {<declare>} {<Id.Lit_VarLike 'currToken='> (DQ (${ Id.VSub_Name list_token))})
            (C {<declare>} {<node>})
            (C {<declare>} {<-a>} {<nodeArr>})
            (command.WhileUntil
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              cond: [(command.Sentence child:(C {<true>}) terminator:<Id.Op_Semi _>)]
              body: 
                (command.DoGroup
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                    (C {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <value>} 
                      {(DQ (${ Id.VSub_Name currToken))}
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:node)
                          op: assign_op.Equal
                          rhs: {(DQ (${ Id.VSub_Name RESULT))}
                          spids: [339]
                        )
                      ]
                    )
                    (command.If
                      arms: [
                        (if_arm
                          cond: [
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                              child: 
                                (C {<Id.Lit_LBracket '['>} {(DQ (${ Id.VSub_Name node))} 
                                  {<Id.Lit_Equals '='> <Id.Lit_Equals '='>} {(DQ )} {<Id.Lit_RBracket ']'>}
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [
                            (C 
                              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <LinkedList> 
                                <Id.Lit_Other ':'> <Id.Lit_Other ':'> <new>
                              }
                            )
                            (command.ShAssignment
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                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:nodeArr)
                                  op: assign_op.Equal
                                  rhs: 
                                    {
                                      (sh_array_literal
                                        left: <Id.Op_LParen _>
                                        words: [
                                          {(DQ (${ Id.VSub_Name value_token))}
                                          {(DQ (${ Id.VSub_Name RESULT))}
                                        ]
                                      )
                                    }
                                  spids: [381]
                                )
                              ]
                            )
                            (C {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <Id.KW_Set set>} 
                              {(DQ (${ Id.VSub_Name currToken))} {<LinkedList>} 
                              {
                                (DQ 
                                  (braced_var_sub
                                    token: <Id.VSub_Name nodeArr>
                                    bracket_op: (bracket_op.WholeArray op_id:Id.Arith_Star)
                                  )
                                )
                              }
                            )
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:RESULT)
                                  op: assign_op.Equal
                                  rhs: {(DQ )}
                                  spids: [420]
                                )
                              ]
                            )
                            (command.ControlFlow
                              token: <Id.ControlFlow_Return return>
                              arg_word: {<0>}
                            )
                          ]
                          spids: [347 366]
                        )
                      ]
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:nodeArr)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (sh_array_literal
                                left: <Id.Op_LParen _>
                                words: [{($ Id.VSub_DollarName '$node')}]
                              )
                            }
                          spids: [433]
                        )
                      ]
                    )
                    (command.If
                      arms: [
                        (if_arm
                          cond: [
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                              child: 
                                (C {<Id.Lit_LBracket '['>} 
                                  {
                                    (DQ 
                                      (braced_var_sub
                                        token: <Id.VSub_Name nodeArr>
                                        prefix_op: (Id.VSub_Pound)
                                        bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                      )
                                    )
                                  } {<-ne>} {<2>} {<Id.Lit_RBracket ']'>}
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [
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                              {
                                (DQ <'Encountered node with single element at ['> 
                                  (${ Id.VSub_Name currToken) <']=['> 
                                  (braced_var_sub
                                    token: <Id.VSub_Name nodeArr>
                                    bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                  ) <']'>
                                )
                              }
                            )
                            (command.ControlFlow
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                              arg_word: {<1>}
                            )
                          ]
                          spids: [439 460]
                        )
                      ]
                    )
                    (command.ShAssignment
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                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:currToken)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (DQ 
                                (braced_var_sub
                                  token: <Id.VSub_Name nodeArr>
                                  bracket_op: 
                                    (bracket_op.ArrayIndex
                                      expr: (arith_expr.ArithWord w:{<Id.Lit_Digits 1>})
                                    )
                                )
                              )
                            }
                          spids: [489]
                        )
                      ]
                    )
                  ]
                )
            )
            (C {<stderr>} {(DQ <'Should never get here'>)})
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
        )
    )
    (command.ShFunction
      name: 'variable::LinkedList::prepend'
      body: 
        (command.BraceGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
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                          expr: 
                            (bool_expr.Binary
                              op_id: Id.BoolBinary_GlobDEqual
                              left: {(${ Id.VSub_Name VARIABLES_DEBUG)}
                              right: {<1>}
                            )
                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.Sentence
                      child: 
                        (C {<stderr>} {(DQ <'variable::LinkedList::prepend '> (${ Id.VSub_At '@'))})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  spids: [548 563]
                )
              ]
            )
            (C {<declare>} {<Id.Lit_VarLike 'list_token='> ($ Id.VSub_Number '$1')})
            (C {<declare>} {<Id.Lit_VarLike 'value_token='> ($ Id.VSub_Number '$2')})
            (C 
              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <type> <Id.Lit_Other ':'> 
                <Id.Lit_Other ':'> <instanceOfOrExit>
              } {(DQ (${ Id.VSub_Name list_token))} {<LinkedList>}
            )
            (C {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <value>} 
              {(DQ (${ Id.VSub_Name list_token))}
            )
            (C {<declare>} {<-a>} 
              {<Id.Lit_VarLike 'node='> 
                (sh_array_literal
                  left: <Id.Op_LParen _>
                  words: [{(${ Id.VSub_Name RESULT)}]
                )
              }
            )
            (C {<declare>} {<-a>} 
              {<Id.Lit_VarLike 'node='> 
                (sh_array_literal
                  left: <Id.Op_LParen _>
                  words: [{(DQ (${ Id.VSub_Name value_token))} {(DQ (${ Id.VSub_Name list_token))}]
                )
              }
            )
            (C 
              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <LinkedList> <Id.Lit_Other ':'> 
                <Id.Lit_Other ':'> <new>
              } {(DQ (braced_var_sub token:<Id.VSub_Name node> bracket_op:(bracket_op.WholeArray op_id:Id.Arith_Star)))}
            )
            (command.ShAssignment
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                (assign_pair
                  lhs: (sh_lhs_expr.Name name:RESULT)
                  op: assign_op.Equal
                  rhs: {(DQ (${ Id.VSub_Name RESULT))}
                  spids: [673]
                )
              ]
            )
          ]
        )
    )
    (command.ShFunction
      name: 'variable::LinkedList::length'
      body: 
        (command.BraceGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
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                          expr: 
                            (bool_expr.Binary
                              op_id: Id.BoolBinary_GlobDEqual
                              left: {(${ Id.VSub_Name VARIABLES_DEBUG)}
                              right: {<1>}
                            )
                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.Sentence
                      child: (C {<stderr>} {(DQ <'variable::LinkedList::length '> (${ Id.VSub_At '@'))})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  spids: [698 713]
                )
              ]
            )
            (C {<declare>} {<Id.Lit_VarLike 'list_token='> ($ Id.VSub_Number '$1')})
            (C 
              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <type> <Id.Lit_Other ':'> 
                <Id.Lit_Other ':'> <instanceOfOrExit>
              } {(DQ (${ Id.VSub_Name list_token))} {<LinkedList>}
            )
            (C {<declare>} {<Id.Lit_VarLike 'currToken='> (DQ (${ Id.VSub_Name list_token))})
            (C {<declare>} {<node>})
            (C {<declare>} {<-a>} {<nodeArr>})
            (C {<declare>} {<-i>} {<Id.Lit_VarLike 'count='> <0>})
            (command.WhileUntil
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              cond: [(command.Sentence child:(C {<true>}) terminator:<Id.Op_Semi _>)]
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                (command.DoGroup
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                      {(DQ (${ Id.VSub_Name currToken))}
                    )
                    (command.ShAssignment
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                          lhs: (sh_lhs_expr.Name name:node)
                          op: assign_op.Equal
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                          spids: [805]
                        )
                      ]
                    )
                    (command.If
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                                  {<Id.Lit_Equals '='> <Id.Lit_Equals '='>} {(DQ )} {<Id.Lit_RBracket ']'>}
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [
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                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:RESULT)
                                  op: assign_op.Equal
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                                  spids: [836]
                                )
                              ]
                            )
                            (command.ControlFlow
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                              arg_word: {<0>}
                            )
                          ]
                          spids: [813 832]
                        )
                      ]
                    )
                    (command.ShAssignment
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                          op: assign_op.Equal
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                            {
                              (sh_array_literal
                                left: <Id.Op_LParen _>
                                words: [{($ Id.VSub_DollarName '$node')}]
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                            }
                          spids: [850]
                        )
                      ]
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                                  {
                                    (DQ 
                                      (braced_var_sub
                                        token: <Id.VSub_Name nodeArr>
                                        prefix_op: (Id.VSub_Pound)
                                        bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                      )
                                    )
                                  } {<-ne>} {<2>} {<Id.Lit_RBracket ']'>}
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [
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                              {
                                (DQ <'Encountered node with single element at ['> 
                                  (${ Id.VSub_Name currToken) <']=['> 
                                  (braced_var_sub
                                    token: <Id.VSub_Name nodeArr>
                                    bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                  ) <']'>
                                )
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                            )
                            (command.ControlFlow
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                              arg_word: {<1>}
                            )
                          ]
                          spids: [856 877]
                        )
                      ]
                    )
                    (command.ShAssignment
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                          op: assign_op.PlusEqual
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                          spids: [906]
                        )
                      ]
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:currToken)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (DQ 
                                (braced_var_sub
                                  token: <Id.VSub_Name nodeArr>
                                  bracket_op: 
                                    (bracket_op.ArrayIndex
                                      expr: (arith_expr.ArithWord w:{<Id.Lit_Digits 1>})
                                    )
                                )
                              )
                            }
                          spids: [910]
                        )
                      ]
                    )
                  ]
                )
            )
            (C {<stderr>} {(DQ <'Should never get here'>)})
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
        )
    )
    (command.ShFunction
      name: 'variable::LinkedList::index'
      body: 
        (command.BraceGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DBracket
                          expr: 
                            (bool_expr.Binary
                              op_id: Id.BoolBinary_GlobDEqual
                              left: {(${ Id.VSub_Name VARIABLES_DEBUG)}
                              right: {<1>}
                            )
                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.Sentence
                      child: (C {<stderr>} {(DQ <'variables_list::index '> (${ Id.VSub_At '@'))})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  spids: [954 969]
                )
              ]
            )
            (C {<declare>} {<Id.Lit_VarLike 'token='> (DQ (${ Id.VSub_Number 1))})
            (C {<declare>} {<-i>} {<Id.Lit_VarLike 'index='> (DQ (${ Id.VSub_Number 2))})
            (C 
              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <type> <Id.Lit_Other ':'> 
                <Id.Lit_Other ':'> <instanceOfOrExit>
              } {(DQ (${ Id.VSub_Name token))} {<LinkedList>}
            )
            (C {<declare>} {<Id.Lit_VarLike 'currToken='> (DQ (${ Id.VSub_Name token))})
            (C {<declare>} {<node>})
            (C {<declare>} {<-a>} {<nodeArr>})
            (C {<declare>} {<-i>} {<Id.Lit_VarLike 'count='> <0>})
            (command.WhileUntil
              keyword: <Id.KW_While while>
              cond: [(command.Sentence child:(C {<true>}) terminator:<Id.Op_Semi _>)]
              body: 
                (command.DoGroup
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                      {(DQ (${ Id.VSub_Name currToken))}
                    )
                    (command.ShAssignment
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                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:node)
                          op: assign_op.Equal
                          rhs: {(DQ (${ Id.VSub_Name RESULT))}
                          spids: [1077]
                        )
                      ]
                    )
                    (command.If
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                          cond: [
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                                  {<Id.Lit_Equals '='> <Id.Lit_Equals '='>} {(DQ )} {<Id.Lit_RBracket ']'>}
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [
                            (C {<stderr>} 
                              {
                                (DQ <'Invalid index ['> (${ Id.VSub_Name index) 
                                  <'] for list of length ['> (${ Id.VSub_Name count) <']'>
                                )
                              }
                            )
                            (command.ControlFlow
                              token: <Id.ControlFlow_Exit exit>
                              arg_word: {<1>}
                            )
                          ]
                          spids: [1085 1104]
                        )
                      ]
                    )
                    (command.ShAssignment
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                          op: assign_op.Equal
                          rhs: 
                            {
                              (sh_array_literal
                                left: <Id.Op_LParen _>
                                words: [{($ Id.VSub_DollarName '$node')}]
                              )
                            }
                          spids: [1131]
                        )
                      ]
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                    (command.If
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                          cond: [
                            (command.Sentence
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                                  {
                                    (DQ 
                                      (braced_var_sub
                                        token: <Id.VSub_Name nodeArr>
                                        prefix_op: (Id.VSub_Pound)
                                        bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                      )
                                    )
                                  } {<-ne>} {<2>} {<Id.Lit_RBracket ']'>}
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [
                            (C {<stderr>} 
                              {
                                (DQ <'Encountered node with single element at ['> 
                                  (${ Id.VSub_Name currToken) <']=['> 
                                  (braced_var_sub
                                    token: <Id.VSub_Name nodeArr>
                                    bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                  ) <']'>
                                )
                              }
                            )
                            (command.ControlFlow
                              token: <Id.ControlFlow_Exit exit>
                              arg_word: {<1>}
                            )
                          ]
                          spids: [1137 1158]
                        )
                      ]
                    )
                    (command.If
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                          cond: [
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                                (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName '$count')} {<-eq>} 
                                  {($ Id.VSub_DollarName '$index')} {<Id.Lit_RBracket ']'>}
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:RESULT)
                                  op: assign_op.Equal
                                  rhs: 
                                    {
                                      (DQ 
                                        (braced_var_sub
                                          token: <Id.VSub_Name nodeArr>
                                          bracket_op: 
                                            (bracket_op.ArrayIndex
                                              expr: (arith_expr.ArithWord w:{<Id.Lit_Digits 0>})
                                            )
                                        )
                                      )
                                    }
                                  spids: [1206]
                                )
                              ]
                            )
                            (command.ControlFlow
                              token: <Id.ControlFlow_Return return>
                              arg_word: {<0>}
                            )
                          ]
                          spids: [1187 1200]
                        )
                      ]
                    )
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                          spids: [1226]
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                    (command.ShAssignment
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                              (DQ 
                                (braced_var_sub
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                                  bracket_op: 
                                    (bracket_op.ArrayIndex
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                          spids: [1230]
                        )
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            (C {<stderr>} {(DQ <'Should never get here'>)})
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
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                  spids: [1278 1293]
                )
              ]
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            (C {<declare>} {<Id.Lit_VarLike 'token='> ($ Id.VSub_Number '$1')})
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              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <type> <Id.Lit_Other ':'> 
                <Id.Lit_Other ':'> <instanceOfOrExit>
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            (C 
              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <LinkedList> <Id.Lit_Other ':'> 
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                  spids: [1366 1381]
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                  spids: [1444 1463]
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                      (DQ 
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                            (bracket_op.ArrayIndex
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                  spids: [1492]
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                  spids: [1529 1544]
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            (C {<declare>} {<Id.Lit_VarLike 'token='> (DQ (${ Id.VSub_Number 1))})
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                  spids: [1611 1630]
                )
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        )
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                  spids: [1666 1681]
                )
              ]
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            (C {<declare>} {<Id.Lit_VarLike 'token='> (DQ (${ Id.VSub_Number 1))})
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                <Id.Lit_Other ':'> <instanceOfOrExit>
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                          spids: [1778]
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                                                  (braced_var_sub
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                                                    bracket_op: 
                                                      (bracket_op.WholeArray
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                                              right: {<0>}
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                                  action: [
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                                          spids: [1831]
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                                      ]
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                                  spids: [1809 1828]
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                                        {
                                          (DQ <'('> 
                                            (braced_var_sub
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                                      spids: [1840]
                                    )
                                  ]
                                )
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                            (command.ControlFlow
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                          spids: [1786 1805]
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                              (sh_array_literal
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                          spids: [1864]
                        )
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                          spids: [1870 1891]
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                    (C {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <toSexp>} 
                      {
                        (braced_var_sub
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                          bracket_op: 
                            (bracket_op.ArrayIndex
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                        )
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                    (command.ShAssignment
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                              (sh_array_literal
                                left: <Id.Op_LParen _>
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                          spids: [1933]
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                    (command.ShAssignment
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                              (DQ 
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                                )
                              )
                            }
                          spids: [1943]
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            (command.Sentence
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              terminator: <Id.Op_Semi _>
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          spids: [1977 1991]
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              {<variable> <Id.Lit_Other ':'> <Id.Lit_Other ':'> <LinkedList> <Id.Lit_Other ':'> 
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