(command.CommandList
  children: [
    (command.CommandList
      children: [
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:NM)
                  op: assign_op.Equal
                  rhs: {(DQ ($ Id.VSub_Number '$1'))}
                  spids: [52]
                )
              ]
            )
          terminator: <Id.Op_Semi _>
        )
        (C {<shift>})
      ]
    )
    (command.WhileUntil
      keyword: <Id.KW_While while>
      cond: 
        (condition.Shell
          commands: [
            (command.Sentence
              child: 
                (C {<Id.Lit_LBracket '['>} {($ Id.VSub_Pound '$#')} {<-gt>} {<0>} {<Id.Lit_RBracket ']'>})
              terminator: <Id.Op_Semi _>
            )
          ]
        )
      body: 
        (command.DoGroup
          children: [
            (command.AndOr
              ops: [Id.Op_DPipe]
              children: [
                (command.Pipeline
                  children: [
                    (command.Subshell
                      child: 
                        (command.CommandList
                          children: [
                            (command.Sentence
                              child: 
                                (C {($ Id.VSub_DollarName '$NM')} {<-P>} {($ Id.VSub_Number '$1')})
                              terminator: <Id.Op_Semi _>
                            )
                            (C {<echo>} {(SQ <'end[end]:'>)})
                          ]
                        )
                    )
                    (C {<gawk>} 
                      {
                        (SQ <' BEGIN {\n'> <'C["accept"]=1\n'> <'C["close"]=1\n'> <'C["connect"]=1\n'> 
                          <'C["creat"]=1\n'> <'C["fcntl"]=1\n'> <'C["fdatasync"]=1\n'> <'C["fsync"]=1\n'> <'C["msgrcv"]=1\n'> <'C["msgsnd"]=1\n'> 
                          <'C["msync"]=1\n'> <'C["nanosleep"]=1\n'> <'C["open"]=1\n'> <'C["open64"]=1\n'> <'C["pause"]=1\n'> <'C["poll"]=1\n'> 
                          <'C["pread"]=1\n'> <'C["pread64"]=1\n'> <'C["pselect"]=1\n'> <'C["pwrite"]=1\n'> <'C["pwrite64"]=1\n'> <'C["read"]=1\n'> 
                          <'C["readv"]=1\n'> <'C["recv"]=1\n'> <'C["recvfrom"]=1\n'> <'C["recvmsg"]=1\n'> <'C["select"]=1\n'> <'C["send"]=1\n'> 
                          <'C["sendmsg"]=1\n'> <'C["sendto"]=1\n'> <'C["sigpause"]=1\n'> <'C["sigsuspend"]=1\n'> <'C["sigwait"]=1\n'> 
                          <'C["sigwaitinfo"]=1\n'> <'C["tcdrain"]=1\n'> <'C["wait"]=1\n'> <'C["waitid"]=1\n'> <'C["waitpid"]=1\n'> <'C["write"]=1\n'> 
                          <'C["writev"]=1\n'> <'C["__xpg_sigpause"]=1\n'> <'}\n'> <'/:$/ {\n'> <'  if (seen)\n'> <'    {\n'> 
                          <'      if (!seen_enable || !seen_disable)\n'> <'\t{\n'> <'\t  printf "in '>
                        ) ($ Id.VSub_Number '$1') (SQ <'(%s) %s'>) (word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\\''>) 
                        (SQ <'s cancellation missing\\n", object, seen\n'> <'\t  ret = 1\n'> <'\t}\n'> 
                          <'    }\n'> <'  seen=""\n'> <'  seen_enable=""\n'> <'  seen_disable=""\n'> 
                          <'  object=gensub(/^.*\\[(.*)\\]:$/, "\\\\1", 1, $0)\n'> <'  next\n'> <'}\n'> <'{\n'> <'  if (C[$1] && $2 ~ /^[TW]$/)\n'> <'    seen=$1\n'> 
                          <
'  else if ($1 ~ /^([.]|)__(libc|pthread)_enable_asynccancel$/ && $2 == "U")\n'
                          > <'    seen_enable=1\n'> 
                          <
'  else if ($1 ~ /^([.]|)__(libc|pthread)_disable_asynccancel$/ && $2 == "U")\n'
                          > <'    seen_disable=1\n'> <'}\n'> <'END {\n'> <'  exit ret\n'> <'}'>
                        )
                      }
                    )
                  ]
                  negated: F
                )
                (command.ControlFlow token:<Id.ControlFlow_Exit exit>)
              ]
            )
            (C {<shift>})
          ]
        )
    )
  ]
)