Hojun-Cho
84ed2ab15a
`t[i].cap` (t a `[N][]u8` / `[N]str`) miscompiled in BOTH stages, divergently — the read-side sibling of #20's store fix. cgexpr on the indexed element leaves the full {ptr,len,cap} header (AX/BX/CX via cgslicehdr), but the `.cap` field-selector never shuffled CX→AX: cstage's typed pseudo-field else-branch handled only .ptr/.len, so `.cap` fell through returning AX=.ptr; wwstage's cgdot non-ident catch-all likewise handled only .ptr/.len, emitting no read (stale AX). `t[i].len` already worked (BX→AX shuffle) — only `.cap` was missing. Fix mirrors the .len shuffle: add the .cap CX→AX arm in both stages. The shuffle fires ONLY for a typed slice/str base (TY_SLICE/TY_STR after NAMED-chase); an untyped str literal (`"abc".cap`) leaves only AX=ptr/BX=len and must return AX unshuffled — keeping the wwstage catch-all byte-identical with cstage, whose cap-shuffle lives in the typed branch, not the untyped catch-all. Validated direct `t[i].cap` (slice + str, elements 0/1) against the whole-element-copy oracle (`let q=t[i]; q.cap`, made correct by #20), plus .len-after-index regression pins, in test 683; dual-stage runtime + byte-id (36/36 ok). combined.ww regenerated.