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zend_language_parser: Remove unused backup_lex_pos - #23224

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ydah:remove-backup-lex-pos
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zend_language_parser: Remove unused backup_lex_pos#23224
ydah wants to merge 1 commit into
php:masterfrom
ydah:remove-backup-lex-pos

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@ydah

@ydah ydah commented Aug 12, 2026

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backup_lex_pos is an empty grammar production used by the arrow function rule to save LANG_SCNG(yy_text), but its semantic value is never consumed.

Remove the unused production and adjust the semantic value references in the arrow function rule accordingly. No runtime behavior is intended to change.

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