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	bluehawk
	Jul 28 2014, 10:08 PM

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	Error (PHL1) Unknown Symbol
	Use of unknown function 'xhpast_parser_token_constants'. Common causes
	are:

	- Your libphutil/ is out of date.
	This is the most common cause.
	Update this copy of libphutil: F:\bin\libphutil

	- Some other library is out of date.
	Update the library this symbol appears in.

	- This symbol is misspelled.
	Spell the symbol name correctly.
	Symbol name spelling is case-sensitive.

	- This symbol was added recently.
	Run `arc liberate` on the library it was added to.

	- This symbol is external. Use `@phutil-external-symbol`.
	Use `grep` to find usage examples of this directive.

	*** ALTHOUGH USUALLY EASY TO FIX, THIS IS A SERIOUS ERROR.
	*** THIS ERROR IS YOUR FAULT. YOU MUST RESOLVE IT.

	5 public function __construct(array $tree, array $stream, $source) {
	6 $this->setTreeType('XHP');
	7 $this->setNodeConstants(xhp_parser_node_constants());
	>>> 8 $this->setTokenConstants(xhpast_parser_token_constants());
	9
	10 parent::__construct($tree, $stream, $source);
	11 }