(CommandList
  children: [
    (Sentence
      child: 
        (C {(.)} 
          {
            (DQ 
              (BracedVarSub
                token: <VSub_Name srcdir>
                suffix_op: (StringUnary op_id:VTest_Equals arg_word:{(.)})
                spids: [48 52]
              ) (/tests/init.sh)
            )
          }
        )
      terminator: <Op_Semi ';'>
    )
    (C {(path_prepend_)} {(./src)})
    (C {(print_ver_)} {(env)})
    (Assignment
      keyword: Assign_None
      pairs: [(assign_pair lhs:(LhsName name:a) op:Equal rhs:{(1)} spids:[70])]
      spids: [70]
    )
    (C {(export)} {(a)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(-)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(out)} spids:[81])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[87])]
          spids: [87]
        )
      ]
    )
    (AndOr
      ops: [Op_DAmp]
      children: [
        (C {(test)} {(-s)} {(out)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[98])]
          spids: [98]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(-i)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(out)} spids:[105])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[111])]
          spids: [111]
        )
      ]
    )
    (AndOr
      ops: [Op_DAmp]
      children: [
        (C {(test)} {(-s)} {(out)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[122])]
          spids: [122]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(-u)} {(a)} {(-i)} {(-u)} {(a)} {(--)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(out)} spids:[139])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[145])]
          spids: [145]
        )
      ]
    )
    (AndOr
      ops: [Op_DAmp]
      children: [
        (C {(test)} {(-s)} {(out)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[156])]
          spids: [156]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(-i)} {(--)} {(Lit_VarLike 'a=') (b)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(out)} spids:[168])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[174])]
          spids: [174]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(echo)} {(Lit_VarLike 'a=') (b)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(exp)} spids:[182])]
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(compare)} {(exp)} {(out)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[198])]
          spids: [198]
        )
      ]
    )
    (C {(env)} {(---)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(125)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[222])]
          spids: [222]
        )
      ]
    )
    (C {(env)} {(-u)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(125)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[242])]
          spids: [242]
        )
      ]
    )
    (C {(env)} {(sh)} {(-c)} {(SQ <'exit 2'>)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(2)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(2)} spids:[268])]
          spids: [268]
        )
      ]
    )
    (C {(env)} {(.)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(126)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[288])]
          spids: [288]
        )
      ]
    )
    (C {(env)} {(no_such)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(127)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[308])]
          spids: [308]
        )
      ]
    )
    (If
      arms: [
        (if_arm
          cond: [
            (Sentence
              child: 
                (Pipeline
                  children: [
                    (C {(env)})
                    (SimpleCommand
                      words: [{(grep)} {(SQ <'^ENV_TEST'>)}]
                      redirects: [
                        (Redir
                          op_id: Redir_Great
                          fd: 16777215
                          arg_word: {(/dev/null)}
                          spids: [354]
                        )
                      ]
                    )
                  ]
                  negated: F
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [(C {(skip_)} {(DQ ('environment has potential interference from ENV_TEST*'))})]
          spids: [16777215 359]
        )
      ]
      spids: [16777215 368]
    )
    (Assignment
      keyword: Assign_None
      pairs: [(assign_pair lhs:(LhsName name:ENV_TEST1) op:Equal rhs:{(a)} spids:[371])]
      spids: [371]
    )
    (C {(export)} {(ENV_TEST1)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(Lit_Other ':')}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(out)} spids:[380])]
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(Lit_VarLike 'ENV_TEST2=')}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(all)} spids:[391])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[397])]
          spids: [397]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (Pipeline
          children: [
            (C {(grep)} {(SQ <'^ENV_TEST'>)} {(all)})
            (SimpleCommand
              words: [{(sort)}]
              redirects: [(Redir op_id:Redir_DGreat fd:16777215 arg_word:{(out)} spids:[415])]
              more_env: [(env_pair name:LC_ALL val:{(C)} spids:[410])]
            )
          ]
          negated: F
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(-u)} {(ENV_TEST1)} {(Lit_VarLike 'ENV_TEST3=') (c)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(all)} spids:[432])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[438])]
          spids: [438]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (Pipeline
          children: [
            (C {(grep)} {(SQ <'^ENV_TEST'>)} {(all)})
            (SimpleCommand
              words: [{(sort)}]
              redirects: [(Redir op_id:Redir_DGreat fd:16777215 arg_word:{(out)} spids:[456])]
              more_env: [(env_pair name:LC_ALL val:{(C)} spids:[451])]
            )
          ]
          negated: F
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(Lit_VarLike 'ENV_TEST1=') (b)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(all)} spids:[469])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[475])]
          spids: [475]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (Pipeline
          children: [
            (C {(grep)} {(SQ <'^ENV_TEST'>)} {(all)})
            (SimpleCommand
              words: [{(sort)}]
              redirects: [(Redir op_id:Redir_DGreat fd:16777215 arg_word:{(out)} spids:[493])]
              more_env: [(env_pair name:LC_ALL val:{(C)} spids:[488])]
            )
          ]
          negated: F
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(Lit_VarLike 'ENV_TEST2=')} {(env)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(all)} spids:[507])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[513])]
          spids: [513]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (Pipeline
          children: [
            (C {(grep)} {(SQ <'^ENV_TEST'>)} {(all)})
            (SimpleCommand
              words: [{(sort)}]
              redirects: [(Redir op_id:Redir_DGreat fd:16777215 arg_word:{(out)} spids:[531])]
              more_env: [(env_pair name:LC_ALL val:{(C)} spids:[526])]
            )
          ]
          negated: F
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(-u)} {(ENV_TEST1)} {(Lit_VarLike 'ENV_TEST3=') (c)} {(env)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(all)} spids:[550])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[556])]
          spids: [556]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (Pipeline
          children: [
            (C {(grep)} {(SQ <'^ENV_TEST'>)} {(all)})
            (SimpleCommand
              words: [{(sort)}]
              redirects: [(Redir op_id:Redir_DGreat fd:16777215 arg_word:{(out)} spids:[574])]
              more_env: [(env_pair name:LC_ALL val:{(C)} spids:[569])]
            )
          ]
          negated: F
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(env)} {(Lit_VarLike 'ENV_TEST1=') (b)} {(env)}]
          redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(all)} spids:[589])]
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[595])]
          spids: [595]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (Pipeline
          children: [
            (C {(grep)} {(SQ <'^ENV_TEST'>)} {(all)})
            (SimpleCommand
              words: [{(sort)}]
              redirects: [(Redir op_id:Redir_DGreat fd:16777215 arg_word:{(out)} spids:[613])]
              more_env: [(env_pair name:LC_ALL val:{(C)} spids:[608])]
            )
          ]
          negated: F
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(cat)}]
          redirects: [
            (HereDoc
              op_id: Redir_DLess
              fd: 16777215
              body: 
                {
                  (DQ ('ENV_TEST1=a\n') ('ENV_TEST2=\n') ('ENV_TEST3=c\n') ('ENV_TEST1=b\n') 
                    ('ENV_TEST1=a\n') ('ENV_TEST2=\n') ('ENV_TEST3=c\n') ('ENV_TEST1=b\n')
                  )
                }
              do_expansion: True
              here_end: EOF
              was_filled: T
              spids: [623]
            )
            (Redir op_id:Redir_Great fd:16777215 arg_word:{(exp)} spids:[626])
          ]
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(compare)} {(exp)} {(out)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[650])]
          spids: [650]
        )
      ]
    )
    (AndOr ops:[Op_DPipe] children:[(C {(mkdir)} {(unlikely_name)}) (C {(framework_failure_)})])
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(cat)}]
          redirects: [
            (HereDoc
              op_id: Redir_DLess
              fd: 16777215
              body: {(DQ ('#!/bin/sh\n') ('echo pass\n'))}
              do_expansion: True
              here_end: EOF
              was_filled: T
              spids: [667]
            )
            (Redir
              op_id: Redir_Great
              fd: 16777215
              arg_word: {(unlikely_name/also_unlikely)}
              spids: [670]
            )
          ]
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(chmod)} {(Lit_Other '+') (x)} {(unlikely_name/also_unlikely)})
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DAmp]
      children: [
        (C {(env)} {(also_unlikely)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[698])]
          spids: [698]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} 
          {(x) 
            (CommandSubPart
              command_list: 
                (CommandList
                  children: [
                    (SimpleCommand
                      words: [{(env)} {(also_unlikely)}]
                      more_env: [
                        (env_pair
                          name: PATH
                          val: {($ VSub_Name '$PATH') (Lit_Other ':') (unlikely_name)}
                          spids: [705]
                        )
                      ]
                    )
                  ]
                )
              left_token: <Left_CommandSub '$('>
              spids: [704 713]
            )
          } {(Lit_Other '=')} {(xpass)}
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[721])]
          spids: [721]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} 
          {(x) 
            (CommandSubPart
              command_list: 
                (CommandList
                  children: [
                    (C {(env)} 
                      {(Lit_VarLike 'PATH=') (DQ ($ VSub_Name '$PATH')) (Lit_Other ':') 
                        (unlikely_name)
                      } {(also_unlikely)}
                    )
                  ]
                )
              left_token: <Left_CommandSub '$('>
              spids: [727 738]
            )
          } {(Lit_Other '=')} {(xpass)}
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[746])]
          spids: [746]
        )
      ]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:PATH)
          op: Equal
          rhs: {($ VSub_Name '$PATH') (Lit_Other ':')}
          spids: [753]
        )
      ]
      spids: [753]
    )
    (C {(export)} {(PATH)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(ln)} {(-s)} {(DQ ($ VSub_Name '$abs_top_builddir') (/src/echo))} {(./-u)})
        (C {(framework_failure_)})
      ]
    )
    (Case
      to_match: 
        {
          (CommandSubPart
            command_list: (CommandList children:[(C {(env)} {(-u)} {(echo)} {(echo)} {(good)})])
            left_token: <Left_CommandSub '$('>
            spids: [794 804]
          )
        }
      arms: [
        (case_arm pat_list:[{(good)}] spids:[809 810 812 16777215])
        (case_arm
          pat_list: [{(Lit_Other '*')}]
          action: [
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[818])]
              spids: [818]
            )
          ]
          spids: [815 816 821 16777215]
        )
      ]
      spids: [792 806 823]
    )
    (Case
      to_match: 
        {
          (CommandSubPart
            command_list: 
              (CommandList
                children: [(C {(env)} {(-u)} {(echo)} {(--)} {(echo)} {(good)})]
              )
            left_token: <Left_CommandSub '$('>
            spids: [827 839]
          )
        }
      arms: [
        (case_arm pat_list:[{(good)}] spids:[844 845 847 16777215])
        (case_arm
          pat_list: [{(Lit_Other '*')}]
          action: [
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[853])]
              spids: [853]
            )
          ]
          spids: [850 851 856 16777215]
        )
      ]
      spids: [825 841 858]
    )
    (Case
      to_match: 
        {
          (CommandSubPart
            command_list: (CommandList children:[(C {(env)} {(--)} {(-u)} {(pass)})])
            left_token: <Left_CommandSub '$('>
            spids: [862 870]
          )
        }
      arms: [
        (case_arm pat_list:[{(pass)}] spids:[875 876 878 16777215])
        (case_arm
          pat_list: [{(Lit_Other '*')}]
          action: [
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[884])]
              spids: [884]
            )
          ]
          spids: [881 882 887 16777215]
        )
      ]
      spids: [860 872 889]
    )
    (C {(env)} {(Lit_VarLike 'a=') (b)} {(--)} {(true)})
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(127)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[914])]
          spids: [914]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(ln)} {(-s)} {(DQ ($ VSub_Name '$abs_top_builddir') (/src/echo))} {(./--)})
        (C {(framework_failure_)})
      ]
    )
    (Case
      to_match: 
        {
          (CommandSubPart
            command_list: 
              (CommandList
                children: [
                  (AndOr
                    ops: [Op_DPipe]
                    children: [
                      (C {(env)} {(Lit_VarLike 'a=') (b)} {(--)} {(true)})
                      (C {(echo)} {(fail)})
                    ]
                  )
                ]
              )
            left_token: <Left_CommandSub '$('>
            spids: [934 949]
          )
        }
      arms: [
        (case_arm pat_list:[{(true)}] spids:[954 955 957 16777215])
        (case_arm
          pat_list: [{(Lit_Other '*')}]
          action: [
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[963])]
              spids: [963]
            )
          ]
          spids: [960 961 966 16777215]
        )
      ]
      spids: [932 951 968]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (SimpleCommand
          words: [{(cat)}]
          redirects: [
            (HereDoc
              op_id: Redir_DLess
              fd: 16777215
              body: {(DQ ('#!/bin/sh\n') ('echo pass\n'))}
              do_expansion: True
              here_end: EOF
              was_filled: T
              spids: [976]
            )
            (Redir
              op_id: Redir_Great
              fd: 16777215
              arg_word: {(./c) (Lit_Other '=') (d)}
              spids: [979]
            )
          ]
        )
        (C {(framework_failure_)})
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [(C {(chmod)} {(Lit_Other '+') (x)} {(Lit_VarLike 'c=') (d)}) (C {(framework_failure_)})]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} 
          {
            (DQ (x) 
              (CommandSubPart
                command_list: 
                  (CommandList
                    children: [(C {(env)} {(Lit_VarLike 'c=') (d)} {(echo)} {(fail)})]
                  )
                left_token: <Left_CommandSub '$('>
                spids: [1007 1016]
              )
            )
          } {(Lit_Other '=')} {(xfail)}
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1025])]
          spids: [1025]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} 
          {
            (DQ (x) 
              (CommandSubPart
                command_list: 
                  (CommandList
                    children: [(C {(env)} {(--)} {(Lit_VarLike 'c=') (d)} {(echo)} {(fail)})]
                  )
                left_token: <Left_CommandSub '$('>
                spids: [1032 1043]
              )
            )
          } {(Lit_Other '=')} {(xfail)}
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1052])]
          spids: [1052]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} 
          {
            (DQ (x) 
              (CommandSubPart
                command_list: 
                  (CommandList
                    children: [(C {(env)} {(./c) (Lit_Other '=') (d)} {(echo)} {(fail)})]
                  )
                left_token: <Left_CommandSub '$('>
                spids: [1059 1069]
              )
            )
          } {(Lit_Other '=')} {(xfail)}
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1078])]
          spids: [1078]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} 
          {
            (DQ (x) 
              (CommandSubPart
                command_list: 
                  (CommandList
                    children: [
                      (C {(env)} {(sh)} {(-c)} {(SQ <'exec "$@"'>)} {(sh)} {(Lit_VarLike 'c=') (d)} {(echo)} 
                        {(fail)}
                      )
                    ]
                  )
                left_token: <Left_CommandSub '$('>
                spids: [1085 1104]
              )
            )
          } {(Lit_Other '=')} {(xpass)}
        )
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1113])]
          spids: [1113]
        )
      ]
    )
    (AndOr
      ops: [Op_DAmp]
      children: [
        (C {(test)} 
          {
            (DQ (x) 
              (CommandSubPart
                command_list: (CommandList children:[(C {(sh)} {(-c)} {(SQ <'\\c=d echo fail'>)})])
                left_token: <Left_CommandSub '$('>
                spids: [1120 1128]
              )
            )
          } {(Lit_Other '=')} {(xpass)}
        )
        (BraceGroup
          children: [
            (Sentence
              child: 
                (AndOr
                  ops: [Op_DPipe]
                  children: [
                    (C {(test)} 
                      {
                        (DQ (x) 
                          (CommandSubPart
                            command_list: 
                              (CommandList
                                children: [(C {(env)} {(sh)} {(-c)} {(SQ <'\\c=d echo fail'>)})]
                              )
                            left_token: <Left_CommandSub '$('>
                            spids: [1147 1157]
                          )
                        )
                      } {(Lit_Other '=')} {(xpass)}
                    )
                    (Assignment
                      keyword: Assign_None
                      pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1166])]
                      spids: [1166]
                    )
                  ]
                )
              terminator: <Op_Semi ';'>
            )
          ]
          spids: [1141]
        )
      ]
    )
    (AndOr
      ops: [Op_DAmp]
      children: [
        (C {(env)} {(-u)} {(Lit_VarLike 'a=') (b)} {(true)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1187])]
          spids: [1187]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(125)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1200])]
          spids: [1200]
        )
      ]
    )
    (AndOr
      ops: [Op_DAmp]
      children: [
        (C {(env)} {(-u)} {(SQ )} {(true)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1214])]
          spids: [1214]
        )
      ]
    )
    (AndOr
      ops: [Op_DPipe]
      children: [
        (C {(test)} {($ VSub_QMark '$?')} {(Lit_Other '=')} {(125)})
        (Assignment
          keyword: Assign_None
          pairs: [(assign_pair lhs:(LhsName name:fail) op:Equal rhs:{(1)} spids:[1227])]
          spids: [1227]
        )
      ]
    )
    (C {(Exit)} {($ VSub_Name '$fail')})
  ]
)