#64 flowed per-decl TY_NAMED wrappers, falsifying two #63-era assumptions
surfaced in the flip review.
elemissignedc read ti.sub for element signedness without peeling TY_NAMED;
a NAMED-of-indexable would read NAMED.sub (nil) instead of the underlying's.
Add the transitive peel ahead of the .sub read, mirroring cstage idx_eff's
type_unwrap (cmd/w6c/cgen.c:790) before eff->sub (:3518-3520). Byte-id-neutral:
every aliased indexable in-tree has a u8 element (typeissigned=false either
way). Independent .sub/.under inventory confirms elemissignedc was the sole
structural reader missing a peel (castsrcprim + TK_AMP already NAMED-guarded;
typeis* handle element NAMED via .under recursion; typeeq is nominal by
design and must not peel).
Refresh the 5 #63 peel-site comments (slotsize, fieldsize, nullableptrtag,
tupleelemslot, fieldslotsize): the peel now actively fires (#64 builds NAMED)
rather than being a no-op; byte-id holds because NAMED collapses to the
alias-invariant underlying.
make test 133/133 (byte-id 990-997 green).
Hojun-Cho
0fde4beeb4