bug in parser with single function

[alexander-akait]

function foo() {
    function () {};
    (function () {});
}

php parser works well

[alexander-akait]

Same problem with

<?php

function () {};

[ichiriac]

that's specific to PHP 7.4 (a part of new introduced syntax)
https://wiki.php.net/rfc/arrow_functions_v2

Commit :
php/php-src@f3e5bbe

Definition
https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L999

inline_function:
		function returns_ref backup_doc_comment '(' parameter_list ')' lexical_vars return_type
		backup_fn_flags '{' inner_statement_list '}' backup_fn_flags
			{ $$ = zend_ast_create_decl(ZEND_AST_CLOSURE, $2 | $13, $1, $3,
				  zend_string_init("{closure}", sizeof("{closure}") - 1, 0),
				  $5, $7, $11, $8); CG(extra_fn_flags) = $9; }
	|	fn returns_ref '(' parameter_list ')' return_type backup_doc_comment T_DOUBLE_ARROW backup_fn_flags backup_lex_pos expr backup_fn_flags
			{ $$ = zend_ast_create_decl(ZEND_AST_ARROW_FUNC, $2 | $12, $1, $7,
				  zend_string_init("{closure}", sizeof("{closure}") - 1, 0), $4, NULL,
				  zend_ast_create(ZEND_AST_RETURN, $11), $6);
				  ((zend_ast_decl *) $$)->lex_pos = $10;
				  CG(extra_fn_flags) = $9; }
;

[alexander-akait]

Yes, in php7.4 we have arrow functions, need fix it