(command.Pipeline
  children: [
    (command.BraceGroup
      children: [
        (command.SimpleCommand
          words: [{(cat)}]
          redirects: [
            (redir.HereDoc
              op: <Redir_DLess '<<'>
              fd: 16777215
              here_begin: {(word_part.EscapedLiteralPart token:<Lit_EscapedChar '\\E'>) (OF)}
              here_end_span_id: 23
              stdin_parts: [('sayIt:\n') ('\t$(foreach b,$(BUILT_INS),echo XXX $(b:$X=) YYY;)\n')]
            )
          ]
        )
        (C {(cat)} {(Makefile)})
      ]
      spids: [12]
    )
    (command.SimpleCommand
      words: [{(make)} {(-f)} {(-)} {(sayIt)}]
      redirects: [(redir.Redir op:<Redir_Great '2>'> fd:2 arg_word:{(/dev/null)})]
    )
    (C {(sed)} {(-n)} {(-e)} {(SQ <'s/.*XXX \\(.*\\) YYY.*/\\1/p'>)})
    (C {(sort)})
    (command.BraceGroup
      children: [
        (command.Assignment
          keyword: Assign_None
          pairs: [
            (assign_pair
              lhs: (lhs_expr.LhsName name:bad spids:[65])
              op: Equal
              rhs: {(0)}
              spids: [65]
            )
          ]
          spids: [65]
        )
        (command.WhileUntil
          keyword: <KW_While while>
          cond: [(C {(read)} {(builtin)})]
          body: 
            (command.DoGroup
              children: [
                (command.Assignment
                  keyword: Assign_None
                  pairs: [
                    (assign_pair
                      lhs: (lhs_expr.LhsName name:base spids:[79])
                      op: Equal
                      rhs: 
                        {
                          (word_part.CommandSubPart
                            command_list: 
                              (command.CommandList
                                children: [
                                  (C {(expr)} {(DQ ($ VSub_Name '$builtin'))} {(Lit_Other ':')} 
                                    {(SQ <'git-\\(.*\\)'>)}
                                  )
                                ]
                              )
                            left_token: <Left_CommandSub '$('>
                            spids: [80 92]
                          )
                        }
                      spids: [79]
                    )
                  ]
                  spids: [79]
                )
                (command.Assignment
                  keyword: Assign_None
                  pairs: [
                    (assign_pair
                      lhs: (lhs_expr.LhsName name:x spids:[95])
                      op: Equal
                      rhs: 
                        {
                          (word_part.CommandSubPart
                            command_list: 
                              (command.CommandList
                                children: [
                                  (C {(sed)} {(-ne)} 
                                    {(SQ <'s/.*{ "'>) ($ VSub_Name '$base') 
                                      (SQ <'", \\(cmd_[^, ]*\\).*/'>) ($ VSub_Name '$base') (SQ <'\t\\1/p'>)
                                    } {(git.c)}
                                  )
                                ]
                              )
                            left_token: <Left_CommandSub '$('>
                            spids: [96 114]
                          )
                        }
                      spids: [95]
                    )
                  ]
                  spids: [95]
                )
                (command.If
                  arms: [
                    (if_arm
                      cond: [(C {(test)} {(-z)} {(DQ ($ VSub_Name '$x'))})]
                      action: [
                        (C {(echo)} 
                          {
                            (DQ ($ VSub_Name '$base') 
                              (' is builtin but not listed in git.c command list')
                            )
                          }
                        )
                        (command.Assignment
                          keyword: Assign_None
                          pairs: [
                            (assign_pair
                              lhs: (lhs_expr.LhsName name:bad spids:[139])
                              op: Equal
                              rhs: {(1)}
                              spids: [139]
                            )
                          ]
                          spids: [139]
                        )
                      ]
                      spids: [16777215 128]
                    )
                  ]
                  spids: [16777215 143]
                )
                (command.ForEach
                  iter_name: sfx
                  iter_words: [{(sh)} {(perl)} {(py)}]
                  do_arg_iter: F
                  body: 
                    (command.DoGroup
                      children: [
                        (command.If
                          arms: [
                            (if_arm
                              cond: [
                                (C {(test)} {(-f)} 
                                  {(DQ ($ VSub_Name '$builtin') (.) ($ VSub_Name '$sfx'))}
                                )
                              ]
                              action: [
                                (C {(echo)} 
                                  {
                                    (DQ ($ VSub_Name '$base') (' is builtin but ') 
                                      ($ VSub_Name '$builtin') (.) ($ VSub_Name '$sfx') (' still exists')
                                    )
                                  }
                                )
                                (command.Assignment
                                  keyword: Assign_None
                                  pairs: [
                                    (assign_pair
                                      lhs: (lhs_expr.LhsName name:bad spids:[190])
                                      op: Equal
                                      rhs: {(1)}
                                      spids: [190]
                                    )
                                  ]
                                  spids: [190]
                                )
                              ]
                              spids: [16777215 175]
                            )
                          ]
                          spids: [16777215 194]
                        )
                      ]
                      spids: [159 197]
                    )
                  spids: [151 16777215]
                )
              ]
              spids: [76 200]
            )
        )
        (command.ControlFlow token:<ControlFlow_Exit exit> arg_word:{($ VSub_Name '$bad')})
      ]
      spids: [62]
    )
  ]
  negated: F
)