preprocess_text_thai() at hb-ot-shape-complex-thai.cc:316 0x7ffff5d4e399
hb_ot_substitute_default() at hb-ot-shape.cc:553 0x7ffff5d458ed
hb_ot_substitute() at hb-ot-shape.cc:595 0x7ffff5d458ed
hb_ot_shape_internal() at hb-ot-shape.cc:795 0x7ffff5d458ed
_hb_ot_shape() at hb-ot-shape.cc:816 0x7ffff5d458ed
hb_shape_plan_execute() at hb-shaper-list.hh:43 0x7ffff5d278b7
hb_shape_full() at hb-shape.cc:375 0x7ffff5d26f2e
hb_shape() at hb-shape.cc:405 0x7ffff5d26f68
basic_engine_shape() at basic-fc.c:398 0x7ffff39b7de4
pango_shape_full() at shape.c:116 0x7ffff7bb8f7b
