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Make sure range (1, 1) doesn't capture anything (bug#80798)

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* src/treesit.c (Ftreesit_query_capture): Return Qnil if
querying (1, 1).
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Yuan Fu 2026-04-16 23:16:49 -07:00
parent 5ea181a75e
commit 35a8e7e068
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src/treesit.c
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@ -4070,6 +4070,11 @@ the query. */)
= XTS_PARSER (XTS_NODE (lisp_node)->parser)->visible_beg;
ptrdiff_t beg_byte = CHAR_TO_BYTE (fix_position (beg));
ptrdiff_t end_byte = CHAR_TO_BYTE (fix_position (end));
/* In ts_query_cursor_set_byte_range, if end_byte = 0, it's set to
UINT32_MAX for some reason. But range (1, 1) shouldn't capture
anything. So in this case just return Qnil. (bug#80798) */
if (beg_byte == visible_beg && end_byte == visible_beg) return Qnil;
/* We never let tree-sitter run on buffers too large, so these
assertion should never hit. */
eassert (beg_byte - visible_beg <= UINT32_MAX);