(CommandList
  children: [
    (C {(printf)} {(DQ ('Status: 500 Intentional Breakage') (Lit_Other '\\') (n))})
    (C {(printf)} {(DQ ('Content-Type: '))})
    (Assignment
      keyword: Assign_None
      pairs: [(assign_pair lhs:(LhsName name:charset) op:Equal rhs:{(iso-8859-1)} spids:[19])]
      spids: [19]
    )
    (Case
      to_match: {(DQ ($ VSub_Name '$PATH_INFO'))}
      arms: [
        (case_arm
          pat_list: [{(Lit_Other '*') (html) (Lit_Other '*')}]
          action: [(C {(printf)} {(DQ (text/html))})]
          spids: [30 33 43 16777215]
        )
        (case_arm
          pat_list: [{(Lit_Other '*') (text) (Lit_Other '*')}]
          action: [(C {(printf)} {(DQ (text/plain))})]
          spids: [45 48 58 16777215]
        )
        (case_arm
          pat_list: [{(Lit_Other '*') (charset) (Lit_Other '*')}]
          action: [
            (C {(printf)} {(DQ ('text/plain; charset=utf-8'))})
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:charset) op:Equal rhs:{(utf-8)} spids:[73])]
              spids: [73]
            )
          ]
          spids: [60 63 77 16777215]
        )
        (case_arm
          pat_list: [{(Lit_Other '*') (utf16) (Lit_Other '*')}]
          action: [
            (C {(printf)} {(DQ ('text/plain; charset=utf-16'))})
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:charset) op:Equal rhs:{(utf-16)} spids:[92])]
              spids: [92]
            )
          ]
          spids: [79 82 96 16777215]
        )
        (case_arm
          pat_list: [{(Lit_Other '*') (odd-spacing) (Lit_Other '*')}]
          action: [
            (C {(printf)} {(DQ ('text/plain; foo=bar ;charset=utf-16; other=nonsense'))})
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:charset) op:Equal rhs:{(utf-16)} spids:[111])]
              spids: [111]
            )
          ]
          spids: [98 101 115 16777215]
        )
      ]
      spids: [22 28 117]
    )
    (C {(printf)} {(DQ (Lit_Other '\\') (n))})
    (C {(printf)} {(DQ (Lit_Other '\\') (n))})
    (Pipeline
      children: [
        (C {(printf)} {(DQ ('this is the error message') (Lit_Other '\\') (n))})
        (C {(iconv)} {(-f)} {(us-ascii)} {(-t)} {($ VSub_Name '$charset')})
      ]
      negated: F
    )
  ]
)