(command.CommandList
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    (command.CommandList
      children: [
        (command.Sentence
          child: 
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-a>} {<_Dbg_yn>}]
              redirects: []
              do_fork: T
            )
          terminator: <Id.Op_Semi _>
        )
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          pairs: [
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              lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike '_Dbg_yn='> name:_Dbg_yn)
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                {
                  (ShArrayLiteral
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                    words: [{(DQ <n>)} {(DQ <y>)}]
                    right: <Id.Right_ShArrayLiteral _>
                  )
                }
            )
          ]
          redirects: []
        )
      ]
    )
    (command.ShFunction
      keyword: <Id.KW_Function function>
      name_tok: <_Dbg_copies>
      name: _Dbg_copies
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.ShAssignment
              left: <Id.Lit_VarLike 'result='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'result='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'result='> name:result)
                  op: assign_op.Equal
                  rhs: {(SQ )}
                )
              ]
              redirects: []
            )
            (command.AndOr
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                (command.DParen
                  left: <Id.Op_DLeftParen _>
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_Less
                      left: {($ Id.VSub_Pound '#')}
                      right: {<Id.Lit_Digits 2>}
                    )
                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
                (command.ControlFlow
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                  arg_word: {<1>}
                )
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              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-r>} {<Id.Lit_VarLike 'string='> (DQ ($ Id.VSub_Number 1))}]
              redirects: []
              do_fork: T
            )
            (command.AndOr
              children: [
                (command.Simple
                  blame_tok: <typeset>
                  more_env: []
                  words: [{<typeset>} {<-i>} {<Id.Lit_VarLike 'count='> ($ Id.VSub_Number 2)}]
                  redirects: []
                  do_fork: T
                )
                (command.ControlFlow
                  keyword: <Id.ControlFlow_Return return>
                  arg_word: {<2>}
                )
              ]
              ops: [<Id.Op_DPipe _>]
            )
            (command.AndOr
              children: [
                (command.DParen
                  left: <Id.Op_DLeftParen _>
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_Great
                      left: ($ Id.Lit_ArithVarLike count)
                      right: {<Id.Lit_Digits 0>}
                    )
                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
                (command.ControlFlow
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                  arg_word: {<3>}
                )
              ]
              ops: [<Id.Op_DPipe _>]
            )
            (command.AndOr
              children: [
                (command.Simple
                  blame_tok: <builtin>
                  more_env: []
                  words: [
                    {<builtin>}
                    {<printf>}
                    {<-v>}
                    {<result>}
                    {(DQ <'%'> (${ Id.VSub_Name count) <s>)}
                    {(SQ <' '>)}
                  ]
                  redirects: []
                  do_fork: T
                )
                (command.ControlFlow
                  keyword: <Id.ControlFlow_Return return>
                  arg_word: {<3>}
                )
              ]
              ops: [<Id.Op_DPipe _>]
            )
            (command.ShAssignment
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              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'result='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'result='> name:result)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (BracedVarSub
                        left: <Id.Left_DollarBrace '${'>
                        token: <Id.VSub_Name result>
                        var_name: result
                        suffix_op: 
                          (suffix_op.PatSub
                            pat: {<' '>}
                            replace: {($ Id.VSub_DollarName string)}
                            replace_mode: Id.Lit_Slash
                            slash_tok: <Id.VOp2_Slash _>
                          )
                        right: <Id.Right_DollarBrace '}'>
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      name_tok: <_Dbg_defined>
      name: _Dbg_defined
      body: 
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          left: <Id.Lit_LBrace '{'>
          children: [
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                (command.DParen
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                  child: 
                    (arith_expr.Binary
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                      left: {<Id.Lit_Digits 0>}
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                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
                (command.ControlFlow
                  keyword: <Id.ControlFlow_Return return>
                  arg_word: {<1>}
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-p>} {(DQ ($ Id.VSub_Number 1))}]
              redirects: [
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                  loc: (redir_loc.Fd fd:1)
                  arg: {<'/dev/null'>}
                )
              ]
              do_fork: T
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      keyword: <Id.KW_Function function>
      name_tok: <_Dbg_esc_dq>
      name: _Dbg_esc_dq
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.Simple
              blame_tok: <builtin>
              more_env: []
              words: [
                {<builtin>}
                {<printf>}
                {(DQ <'%q'> <Id.Lit_BadBackslash '\\'> <n>)}
                {(DQ ($ Id.VSub_Number 1))}
              ]
              redirects: []
              do_fork: T
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.Sentence
      child: 
        (command.Simple
          blame_tok: <typeset>
          more_env: []
          words: [{<typeset>} {<-a>} {<_Dbg_eval_re>}]
          redirects: []
          do_fork: T
        )
      terminator: <Id.Op_Semi _>
    )
    (command.ShAssignment
      left: <Id.Lit_VarLike '_Dbg_eval_re='>
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike '_Dbg_eval_re='>
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike '_Dbg_eval_re='> name:_Dbg_eval_re)
          op: assign_op.Equal
          rhs: 
            {
              (ShArrayLiteral
                left: <Id.Op_LParen _>
                words: [
                  {(SQ <'^[ \\t]*(if|elif)[ \\t]+([^;]*)((;[ \\t]*then?)?|$)'>)}
                  {(SQ <'^[ \\t]*return[ \\t]+(.*)$'>)}
                  {(SQ <'^[ \\t]*while[ \\t]+([^;]*)((;[ \\t]*do?)?|$)'>)}
                  {(SQ <'^[ \\t]*[A-Za-z_][A-Za-z_0-9_]*[+-]?=(.*$)'>)}
                  {
                    (DQ <'^[ '> <Id.Lit_BadBackslash '\\'> <'t]*[A-Za-z_][A-Za-z_0-9_]*'> 
                      <Id.Lit_BadBackslash '\\'> <'[[0-9]+'> <Id.Lit_BadBackslash '\\'> <'][+-]?=(.*'> 
                      (word_part.EscapedLiteral
                        token: <Id.Lit_EscapedChar '\\$'>
                        ch: '$'
                      ) <')'>
                    )
                  }
                ]
                right: <Id.Right_ShArrayLiteral _>
              )
            }
        )
      ]
      redirects: []
    )
    (command.ShFunction
      name_tok: <_Dbg_eval_extract_condition>
      name: _Dbg_eval_extract_condition
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.ShAssignment
              left: <Id.Lit_VarLike 'orig='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'orig='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'orig='> name:orig)
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                  rhs: {(DQ ($ Id.VSub_Number 1))}
                )
              ]
              redirects: []
            )
            (command.If
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              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_EqualTilde
                                  left: {($ Id.VSub_DollarName orig)}
                                  right: 
                                    {
                                      (BracedVarSub
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                                        token: <Id.VSub_Name _Dbg_eval_re>
                                        var_name: _Dbg_eval_re
                                        bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 0>})
                                        right: <Id.Right_DollarBrace '}'>
                                      )
                                    }
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.ShAssignment
                      left: <Id.Lit_VarLike 'extracted='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike 'extracted='>
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extracted='> name:extracted)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (BracedVarSub
                                left: <Id.Left_DollarBrace '${'>
                                token: <Id.VSub_Name BASH_REMATCH>
                                var_name: BASH_REMATCH
                                bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 2>})
                                right: <Id.Right_DollarBrace '}'>
                              )
                            }
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [353 372]
                )
                (IfArm
                  keyword: <Id.KW_Elif elif>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_EqualTilde
                                  left: {($ Id.VSub_DollarName orig)}
                                  right: 
                                    {
                                      (BracedVarSub
                                        left: <Id.Left_DollarBrace '${'>
                                        token: <Id.VSub_Name _Dbg_eval_re>
                                        var_name: _Dbg_eval_re
                                        bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 1>})
                                        right: <Id.Right_DollarBrace '}'>
                                      )
                                    }
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.ShAssignment
                      left: <Id.Lit_VarLike 'extracted='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike 'extracted='>
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extracted='> name:extracted)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (DQ <'echo '> 
                                (BracedVarSub
                                  left: <Id.Left_DollarBrace '${'>
                                  token: <Id.VSub_Name BASH_REMATCH>
                                  var_name: BASH_REMATCH
                                  bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 1>})
                                  right: <Id.Right_DollarBrace '}'>
                                )
                              )
                            }
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [384 403]
                )
                (IfArm
                  keyword: <Id.KW_Elif elif>
                  cond: 
                    (condition.Shell
                      commands: [
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                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_EqualTilde
                                  left: {($ Id.VSub_DollarName orig)}
                                  right: 
                                    {
                                      (BracedVarSub
                                        left: <Id.Left_DollarBrace '${'>
                                        token: <Id.VSub_Name _Dbg_eval_re>
                                        var_name: _Dbg_eval_re
                                        bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 2>})
                                        right: <Id.Right_DollarBrace '}'>
                                      )
                                    }
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.ShAssignment
                      left: <Id.Lit_VarLike 'extracted='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike 'extracted='>
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extracted='> name:extracted)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (BracedVarSub
                                left: <Id.Left_DollarBrace '${'>
                                token: <Id.VSub_Name BASH_REMATCH>
                                var_name: BASH_REMATCH
                                bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 1>})
                                right: <Id.Right_DollarBrace '}'>
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                            }
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [418 437]
                )
                (IfArm
                  keyword: <Id.KW_Elif elif>
                  cond: 
                    (condition.Shell
                      commands: [
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                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_EqualTilde
                                  left: {($ Id.VSub_DollarName orig)}
                                  right: 
                                    {
                                      (BracedVarSub
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                                        right: <Id.Right_DollarBrace '}'>
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                                    }
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
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                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.ShAssignment
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                      pairs: [
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                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extracted='> name:extracted)
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                          rhs: 
                            {
                              (DQ <'echo '> 
                                (BracedVarSub
                                  left: <Id.Left_DollarBrace '${'>
                                  token: <Id.VSub_Name BASH_REMATCH>
                                  var_name: BASH_REMATCH
                                  bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 1>})
                                  right: <Id.Right_DollarBrace '}'>
                                )
                              )
                            }
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [449 468]
                )
                (IfArm
                  keyword: <Id.KW_Elif elif>
                  cond: 
                    (condition.Shell
                      commands: [
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                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_EqualTilde
                                  left: {($ Id.VSub_DollarName orig)}
                                  right: 
                                    {
                                      (BracedVarSub
                                        left: <Id.Left_DollarBrace '${'>
                                        token: <Id.VSub_Name _Dbg_eval_re>
                                        var_name: _Dbg_eval_re
                                        bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 4>})
                                        right: <Id.Right_DollarBrace '}'>
                                      )
                                    }
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.ShAssignment
                      left: <Id.Lit_VarLike 'extracted='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike 'extracted='>
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extracted='> name:extracted)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (DQ <'echo '> 
                                (BracedVarSub
                                  left: <Id.Left_DollarBrace '${'>
                                  token: <Id.VSub_Name BASH_REMATCH>
                                  var_name: BASH_REMATCH
                                  bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 1>})
                                  right: <Id.Right_DollarBrace '}'>
                                )
                              )
                            }
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [483 502]
                )
              ]
              else_kw: <Id.KW_Else else>
              else_action: [
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                  left: <Id.Lit_VarLike 'extracted='>
                  pairs: [
                    (AssignPair
                      left: <Id.Lit_VarLike 'extracted='>
                      lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extracted='> name:extracted)
                      op: assign_op.Equal
                      rhs: {($ Id.VSub_DollarName orig)}
                    )
                  ]
                  redirects: []
                )
              ]
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      keyword: <Id.KW_Function function>
      name_tok: <_Dbg_onoff>
      name: _Dbg_onoff
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<Id.Lit_VarLike 'onoff='> (SQ <off.>)}]
              redirects: []
              do_fork: T
            )
            (command.AndOr
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                (command.DParen
                  left: <Id.Op_DLeftParen _>
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_NEqual
                      left: {($ Id.VSub_Number 1)}
                      right: {<Id.Lit_Digits 0>}
                    )
                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
                (command.ShAssignment
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                  pairs: [
                    (AssignPair
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                      lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'onoff='> name:onoff)
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                      rhs: {(SQ <on.>)}
                    )
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                  redirects: []
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <builtin>
              more_env: []
              words: [{<builtin>} {<echo>} {($ Id.VSub_DollarName onoff)}]
              redirects: []
              do_fork: T
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      keyword: <Id.KW_Function function>
      name_tok: <_Dbg_set_dol_q>
      name: _Dbg_set_dol_q
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.ControlFlow
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              arg_word: 
                {
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Number 1>
                    var_name: 1
                    suffix_op: 
                      (suffix_op.Unary
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                        arg_word: {($ Id.VSub_DollarName _Dbg_debugged_exit_code)}
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                    right: <Id.Right_DollarBrace '}'>
                  )
                }
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      keyword: <Id.KW_Function function>
      name_tok: <_Dbg_split>
      name: _Dbg_split
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
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              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<Id.Lit_VarLike 'old_IFS='> ($ Id.VSub_DollarName IFS)}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [
                {<typeset>}
                {<Id.Lit_VarLike 'new_ifs='> 
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Number 1>
                    var_name: 1
                    suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{(SQ <' '>)})
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <shift>
              more_env: []
              words: [{<shift>}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-r>} {<Id.Lit_VarLike 'text='> (DQ ($ Id.VSub_Star '*'))}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-a>} {<array>}]
              redirects: []
              do_fork: T
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'IFS='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'IFS='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'IFS='> name:IFS)
                  op: assign_op.Equal
                  rhs: {(DQ ($ Id.VSub_DollarName new_ifs))}
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              ]
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'array='>
              pairs: [
                (AssignPair
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                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'array='> name:array)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (ShArrayLiteral
                        left: <Id.Op_LParen _>
                        words: [{($ Id.VSub_DollarName text)}]
                        right: <Id.Right_ShArrayLiteral _>
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.Simple
              blame_tok: <echo>
              more_env: []
              words: [
                {<echo>}
                {
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Name array>
                    var_name: array
                    bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'IFS='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'IFS='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'IFS='> name:IFS)
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_DollarName old_IFS)}
                )
              ]
              redirects: []
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      name_tok: <_Dbg_get_functions>
      name: _Dbg_get_functions
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [
                {<typeset>}
                {<-i>}
                {<Id.Lit_VarLike 'include_system='> 
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Number 1>
                    var_name: 1
                    suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{<0>})
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [
                {<typeset>}
                {<Id.Lit_VarLike 'pat='> 
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Number 2>
                    var_name: 2
                    suffix_op: 
                      (suffix_op.Unary
                        op: <Id.VTest_ColonHyphen _>
                        arg_word: {<.> <Id.Lit_Other '*'>}
                      )
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-a>} {<fns_a>}]
              redirects: []
              do_fork: T
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'fns_a='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'fns_a='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'fns_a='> name:fns_a)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (ShArrayLiteral
                        left: <Id.Op_LParen _>
                        words: [
                          {
                            (CommandSub
                              left_token: <Id.Left_DollarParen '$('>
                              child: 
                                (command.Simple
                                  blame_tok: <declare>
                                  more_env: []
                                  words: [{<declare>} {<-F>}]
                                  redirects: []
                                  do_fork: T
                                )
                              right: <Id.Eof_RParen _>
                            )
                          }
                        ]
                        right: <Id.Right_ShArrayLiteral _>
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [
                {<typeset>}
                {<-a>}
                {<Id.Lit_VarLike 'ret_fns='> 
                  (ShArrayLiteral
                    left: <Id.Op_LParen _>
                    words: []
                    right: <Id.Right_ShArrayLiteral _>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<i>}]
              redirects: []
              do_fork: T
            )
            (command.Sentence
              child: 
                (command.Simple
                  blame_tok: <typeset>
                  more_env: []
                  words: [{<typeset>} {<-i>} {<Id.Lit_VarLike 'invert='> <0>}]
                  redirects: []
                  do_fork: T
                )
              terminator: <Id.Op_Semi _>
            )
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_GlobDEqual
                                  left: {($ Id.VSub_DollarName pat)}
                                  right: {<Id.KW_Bang '!'> <Id.Lit_Other '*'>}
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.ShAssignment
                      left: <Id.Lit_VarLike 'pat='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike 'pat='>
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'pat='> name:pat)
                          op: assign_op.Equal
                          rhs: 
                            {<Id.Lit_Pound '#'> <Id.Lit_LBrace '{'> ($ Id.VSub_DollarName pat) 
                              <Id.Lit_Pound '#'> <Id.KW_Bang '!'> <Id.Lit_RBrace '}'>
                            }
                        )
                      ]
                      redirects: []
                    )
                    (command.ShAssignment
                      left: <Id.Lit_VarLike 'invert='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike 'invert='>
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'invert='> name:invert)
                          op: assign_op.Equal
                          rhs: {<1>}
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [780 795]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.ForExpr
              keyword: <Id.KW_For for>
              init: 
                (arith_expr.BinaryAssign
                  op_id: Id.Arith_Equal
                  left: ($ Id.Lit_ArithVarLike i)
                  right: {<Id.Lit_Digits 2>}
                )
              cond: 
                (arith_expr.Binary
                  op_id: Id.Arith_Less
                  left: ($ Id.Lit_ArithVarLike i)
                  right: 
                    {
                      (BracedVarSub
                        left: <Id.Left_DollarBrace '${'>
                        token: <Id.VSub_Name fns_a>
                        var_name: fns_a
                        prefix_op: <Id.VSub_Pound '#'>
                        bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                        right: <Id.Right_DollarBrace '}'>
                      )
                    }
                )
              update: 
                (arith_expr.BinaryAssign
                  op_id: Id.Arith_PlusEqual
                  left: ($ Id.Lit_ArithVarLike i)
                  right: {<Id.Lit_Digits 3>}
                )
              body: 
                (command.DoGroup
                  left: <Id.KW_Do do>
                  children: [
                    (command.Simple
                      blame_tok: <typeset>
                      more_env: []
                      words: [
                        {<typeset>}
                        {<Id.Lit_VarLike 'fn='> 
                          (DQ 
                            (BracedVarSub
                              left: <Id.Left_DollarBrace '${'>
                              token: <Id.VSub_Name fns_a>
                              var_name: fns_a
                              bracket_op: (bracket_op.ArrayIndex expr:{($ Id.VSub_DollarName i)})
                              right: <Id.Right_DollarBrace '}'>
                            )
                          )
                        }
                      ]
                      redirects: []
                      do_fork: T
                    )
                    (command.AndOr
                      children: [
                        (command.DBracket
                          left: <Id.KW_DLeftBracket '[['>
                          expr: 
                            (bool_expr.Binary
                              op_id: Id.BoolBinary_GlobDEqual
                              left: {($ Id.VSub_DollarName fn)}
                              right: {<_> <Id.Lit_Other '*'>}
                            )
                          right: <Id.Lit_DRightBracket ']]'>
                          redirects: []
                        )
                        (command.DParen
                          left: <Id.Op_DLeftParen _>
                          child: 
                            (arith_expr.Unary
                              op_id: Id.Arith_Bang
                              child: ($ Id.Lit_ArithVarLike include_system)
                            )
                          right: <Id.Op_DRightParen _>
                          redirects: []
                        )
                        (command.ControlFlow
                          keyword: <Id.ControlFlow_Continue continue>
                        )
                      ]
                      ops: [<Id.Op_DAmp _> <Id.Op_DAmp _>]
                    )
                    (command.If
                      if_kw: <Id.KW_If if>
                      arms: [
                        (IfArm
                          keyword: <Id.KW_If if>
                          cond: 
                            (condition.Shell
                              commands: [
                                (command.Sentence
                                  child: 
                                    (command.DBracket
                                      left: <Id.KW_DLeftBracket '[['>
                                      expr: 
                                        (bool_expr.Binary
                                          op_id: Id.BoolBinary_EqualTilde
                                          left: {($ Id.VSub_DollarName fn)}
                                          right: {($ Id.VSub_DollarName pat)}
                                        )
                                      right: <Id.Lit_DRightBracket ']]'>
                                      redirects: []
                                    )
                                  terminator: <Id.Op_Semi _>
                                )
                              ]
                            )
                          then_kw: <Id.KW_Then then>
                          action: [
                            (command.AndOr
                              children: [
                                (command.DBracket
                                  left: <Id.KW_DLeftBracket '[['>
                                  expr: 
                                    (bool_expr.Binary
                                      op_id: Id.BoolBinary_GlobDEqual
                                      left: {($ Id.VSub_DollarName invert)}
                                      right: {<0>}
                                    )
                                  right: <Id.Lit_DRightBracket ']]'>
                                  redirects: []
                                )
                                (command.ShAssignment
                                  left: <Id.Lit_ArrayLhsOpen 'ret_fns['>
                                  pairs: [
                                    (AssignPair
                                      left: <Id.Lit_ArrayLhsOpen 'ret_fns['>
                                      lhs: 
                                        (sh_lhs_expr.IndexedName
                                          left: <Id.Lit_ArrayLhsOpen 'ret_fns['>
                                          name: ret_fns
                                          index: 
                                            {
                                              (BracedVarSub
                                                left: <Id.Left_DollarBrace '${'>
                                                token: <Id.VSub_Name ret_fns>
                                                var_name: ret_fns
                                                prefix_op: <Id.VSub_Pound '#'>
                                                bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                                right: <Id.Right_DollarBrace '}'>
                                              )
                                            }
                                        )
                                      op: assign_op.Equal
                                      rhs: {($ Id.VSub_DollarName fn)}
                                    )
                                  ]
                                  redirects: []
                                )
                              ]
                              ops: [<Id.Op_DAmp _>]
                            )
                          ]
                          spids: [906 920]
                        )
                      ]
                      else_kw: <Id.KW_Else else>
                      else_action: [
                        (command.AndOr
                          children: [
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_GlobNEqual
                                  left: {($ Id.VSub_DollarName invert)}
                                  right: {<0>}
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                            (command.ShAssignment
                              left: <Id.Lit_ArrayLhsOpen 'ret_fns['>
                              pairs: [
                                (AssignPair
                                  left: <Id.Lit_ArrayLhsOpen 'ret_fns['>
                                  lhs: 
                                    (sh_lhs_expr.IndexedName
                                      left: <Id.Lit_ArrayLhsOpen 'ret_fns['>
                                      name: ret_fns
                                      index: 
                                        {
                                          (BracedVarSub
                                            left: <Id.Left_DollarBrace '${'>
                                            token: <Id.VSub_Name ret_fns>
                                            var_name: ret_fns
                                            prefix_op: <Id.VSub_Pound '#'>
                                            bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                            right: <Id.Right_DollarBrace '}'>
                                          )
                                        }
                                    )
                                  op: assign_op.Equal
                                  rhs: {($ Id.VSub_DollarName fn)}
                                )
                              ]
                              redirects: []
                            )
                          ]
                          ops: [<Id.Op_DAmp _>]
                        )
                      ]
                      fi_kw: <Id.KW_Fi fi>
                      redirects: []
                    )
                  ]
                  right: <Id.KW_Done done>
                )
              redirects: []
            )
            (command.Simple
              blame_tok: <echo>
              more_env: []
              words: [
                {<echo>}
                {
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Name ret_fns>
                    var_name: ret_fns
                    bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      name_tok: <_Dbg_is_function>
      name: _Dbg_is_function
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.AndOr
              children: [
                (command.DParen
                  left: <Id.Op_DLeftParen _>
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_DEqual
                      left: {<Id.Lit_Digits 0>}
                      right: {($ Id.VSub_Pound '#')}
                    )
                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
                (command.ControlFlow
                  keyword: <Id.ControlFlow_Return return>
                  arg_word: {<1>}
                )
              ]
              ops: [<Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<Id.Lit_VarLike 'needed_fn='> ($ Id.VSub_Number 1)}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [
                {<typeset>}
                {<-i>}
                {<Id.Lit_VarLike 'include_system='> 
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Number 2>
                    var_name: 2
                    suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{<0>})
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.AndOr
              children: [
                (command.DBracket
                  left: <Id.KW_DLeftBracket '[['>
                  expr: 
                    (bool_expr.Binary
                      op_id: Id.BoolBinary_GlobDEqual
                      left: 
                        {
                          (BracedVarSub
                            left: <Id.Left_DollarBrace '${'>
                            token: <Id.VSub_Name needed_fn>
                            var_name: needed_fn
                            suffix_op: 
                              (suffix_op.Slice
                                begin: {<Id.Lit_Digits 0>}
                                length: {<Id.Lit_Digits 1>}
                              )
                            right: <Id.Arith_RBrace _>
                          )
                        }
                      right: {(SQ <_>)}
                    )
                  right: <Id.Lit_DRightBracket ']]'>
                  redirects: []
                )
                (command.DParen
                  left: <Id.Op_DLeftParen _>
                  child: 
                    (arith_expr.Unary
                      op_id: Id.Arith_Bang
                      child: ($ Id.Lit_ArithVarLike include_system)
                    )
                  right: <Id.Op_DRightParen _>
                  redirects: []
                )
                (BraceGroup
                  left: <Id.Lit_LBrace '{'>
                  children: [
                    (command.ControlFlow
                      keyword: <Id.ControlFlow_Return return>
                      arg_word: {<1>}
                    )
                  ]
                  redirects: []
                  right: <Id.Lit_RBrace '}'>
                )
              ]
              ops: [<Id.Op_DAmp _> <Id.Op_DAmp _>]
            )
            (command.Simple
              blame_tok: <declare>
              more_env: []
              words: [{<declare>} {<-F>} {($ Id.VSub_DollarName needed_fn)}]
              redirects: [
                (Redir
                  op: <Id.Redir_Great '>'>
                  loc: (redir_loc.Fd fd:1)
                  arg: {<'/dev/null'>}
                )
                (Redir op:<Id.Redir_GreatAnd '2>&'> loc:(redir_loc.Fd fd:2) arg:{<1>})
              ]
              do_fork: T
            )
            (command.ControlFlow
              keyword: <Id.ControlFlow_Return return>
              arg_word: {($ Id.VSub_QMark '?')}
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      name_tok: <_Dbg_is_traced>
      name: _Dbg_is_traced
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_GlobDEqual
                                  left: {($ Id.VSub_Hyphen -)}
                                  right: {<Id.Lit_Other '*'> <x> <Id.Lit_Other '*'>}
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [(command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})]
                  spids: [1134 1150]
                )
              ]
              else_kw: <Id.KW_Else else>
              else_action: [(command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<1>})]
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.ShFunction
      keyword: <Id.KW_Function function>
      name_tok: <_Dbg_linespec_setup>
      name: _Dbg_linespec_setup
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [
                {<typeset>}
                {<Id.Lit_VarLike 'linespec='> 
                  (BracedVarSub
                    left: <Id.Left_DollarBrace '${'>
                    token: <Id.VSub_Number 1>
                    var_name: 1
                    suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{(SQ )})
                    right: <Id.Right_DollarBrace '}'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Unary
                                  op_id: Id.BoolUnary_z
                                  child: {($ Id.VSub_DollarName linespec)}
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <_Dbg_errmsg>
                      more_env: []
                      words: [{<_Dbg_errmsg>} {(DQ <'Invalid line specification, null given'>)}]
                      redirects: []
                      do_fork: T
                    )
                  ]
                  spids: [1202 1214]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-a>} {<word>}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <eval>
              more_env: []
              words: [
                {<eval>}
                {
                  (DQ <'word=('> 
                    (CommandSub
                      left_token: <Id.Left_DollarParen '$('>
                      child: 
                        (command.Simple
                          blame_tok: <_Dbg_parse_linespec>
                          more_env: []
                          words: [{<_Dbg_parse_linespec>} {($ Id.VSub_DollarName linespec)}]
                          redirects: []
                          do_fork: T
                        )
                      right: <Id.Eof_RParen _>
                    ) <')'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DBracket
                              left: <Id.KW_DLeftBracket '[['>
                              expr: 
                                (bool_expr.Binary
                                  op_id: Id.BoolBinary_GlobDEqual
                                  left: 
                                    {
                                      (BracedVarSub
                                        left: <Id.Left_DollarBrace '${'>
                                        token: <Id.VSub_Name word>
                                        var_name: word
                                        prefix_op: <Id.VSub_Pound '#'>
                                        bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                        right: <Id.Right_DollarBrace '}'>
                                      )
                                    }
                                  right: {<0>}
                                )
                              right: <Id.Lit_DRightBracket ']]'>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <_Dbg_errmsg>
                      more_env: []
                      words: [
                        {<_Dbg_errmsg>}
                        {(DQ <'Invalid line specification: '> ($ Id.VSub_DollarName linespec))}
                      ]
                      redirects: []
                      do_fork: T
                    )
                    (command.ControlFlow keyword:<Id.ControlFlow_Return return>)
                  ]
                  spids: [1247 1267]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'filename='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'filename='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'filename='> name:filename)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (BracedVarSub
                          left: <Id.Left_DollarBrace '${'>
                          token: <Id.VSub_Name word>
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                          bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 2>})
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