_hb_allocate_lig_id  838 third_party/harfbuzz-ng/src/hb-ot-layout-gsubgpos-private.hh   unsigned int lig_id = is_mark_ligature ? 0 : _hb_allocate_lig_id (buffer);
_hb_allocate_lig_id  336 third_party/harfbuzz-ng/src/hb-ot-layout-private.hh     lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */