The widen choke-point's struct-payload arm carried its own inline
N_STRUCTLIT field loop -- a parallel fill that drifted from
cg_structlit_fill/cgstructlitfill: no tagged-field widen arm, so a
(void|T)-typed field's raw scalar landed in the field's TAG word
(silent truncation past the first tagged field, both stages,
byte-id, gate-blind; prober-9 PG5). Delete both loops and delegate
to the canonical fill at the payload base: one fill path, one widen
path, mutually recursive. Inherits the nested-struct/call/arrlit
field arms and closes a latent fsz==2 cs!=ww (old ww loop's
fieldstoreop MOVW vs cstage MOVQ). Test 938: 15-row table-driven
runtime readback (incl. ellipsis autofill, offset-0 tagged field,
(void|str) payload, 3-level widen-fill recursion torture), all 13
bug rows silent-fail at master 6699158; 2 rows skip the byte-id
check loudly (pre-existing match-on-tagged-FIELD readback cs!=ww,
master-confirmed, separate family).
Hojun-Cho
413aafa599