(List
  (Com {[LIT_CHARS set]} {[LIT_CHARS -e]})
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('lib', {[DQ [VarSub BUILT_PRODUCTS_DIR][LIT_CHARS /][VarSub FULL_PRODUCT_NAME]]})])
  (Com {[LIT_CHARS nm]} {[VarSub lib]}
    <
    (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT ">"> 1),
    >
  )
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('pattern', {[DQ [VarSub 1]]})])
  (If
    (Com {[LIT_OTHER "["]} {[VarSub pattern]} {[LIT_OTHER "!"] [LIT_OTHER "="]} {[DQ [LIT_CHARS "a|b"]]} {[LIT_OTHER "]"]})
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Parameter quote escaping is broken"]]})
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]})
    )
  )
  (If
    (Com {[LIT_OTHER "["]} {[DQ [VarSub 2]]} {[LIT_OTHER "!"] [LIT_OTHER "="]} {[DQ [LIT_CHARS "arg with spaces"]]} {[LIT_OTHER "]"]})
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Parameter space escaping is broken"]]})
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]})
    )
  )
  (Com {[LIT_CHARS touch]} {[DQ [VarSub lib]] [LIT_CHARS _touch.a]})
)