(CommandList
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              (BracedVarSub
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                spids: [47 51]
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            )
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      terminator: <Op_Semi ';'>
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        )
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        )
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        )
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        )
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        )
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          spids: [176]
        )
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        (Assignment
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        )
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        (C {(test)} {(-f)} {(xab)})
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          spids: [312]
        )
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        )
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        )
        (Assignment
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        )
        (Assignment
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        )
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            )
          ]
          action: [
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                    {(split)}
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                  redirects: [
                    (Redir
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                      fd: 16777215
                      arg_word: {(/dev/null)}
                      spids: [403]
                    )
                  ]
                )
                (Assignment
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                  spids: [408]
                )
              ]
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          spids: [16777215 386]
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      spids: [16777215 411]
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            {(split)}
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              ($ VSub_Name '$UINTMAX_MAX')
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          ]
          redirects: [
            (Redir op_id:Redir_Less fd:16777215 arg_word:{(/dev/null)} spids:[422])
            (Redir op_id:Redir_Great fd:16777215 arg_word:{(/dev/null)} spids:[425])
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        (Assignment
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            (Redir op_id:Redir_Great fd:2 arg_word:{(/dev/null)} spids:[443])
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          do_expansion: False
          here_end: EOF
          was_filled: T
          spids: [507]
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                  negated: T
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              ]
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)