#35 (fold-5 blocker, PG6): the append() spread arm dispatched on
SOURCE node kind — ident-local only; both fold-5 dup shapes
loud-rejected on BOTH stages: deref-spine `append(dup,
(*tsp)[0].caps...)` (add_thread regex.ha:569/572) and indexed
`append(res, ts[0].caps...)` (search ha:820).
Route every non-ident-local source through cgplaceaddr (the
established place choke-point: C1 stores, C1.25 aggregate fields, FA1
append targets, #49 element sources): the source header ADDRESS
resolves ONCE, pre-grow, into a fresh per-site @appsprscr spill, and
every loop iteration re-reads .ptr/.len THROUGH the spilled header
after the grow. This adapts the #49 split ruling to the spread's
full-range copy: the chain's rvalues (deref-root pointer expr, index
exprs) evaluate exactly once PRE-grow — an index reading the dst's
len sees the pre-append value — while the source data base and len
re-derive live each iteration, so a source header aliasing the dst
header re-roots post-realloc. A header reached through a buffer the
grow reallocs reads the STALE copy — bit-identical under the
non-reclaiming rt/malloc, the same documented #49 stale-base hole
(pinned by the spread_selfalias_chain row). Ident-local sources keep
the legacy BP-disp emission byte-identical.
New loudness with the same fix: the spread source's stamped type must
chase to TY_SLICE/TY_STR — a [N]T array ident source previously read
its first 16 DATA bytes as a {ptr,len} header, silently. Array wiring
plus the remaining rvalue sources (CALL, slicing exprs) stay loud,
filed task #27. Global-ident sources now resolve on cstage but are
blocked by a pre-existing wwstage checker reject ("let: not
assignable", task #29) — no dual-stage row until that closes.
806_append_place: reject_spread_src GRADUATES to a runtime row
(spread_place_deref, the old reject source verbatim + readback); new
rows spread_dup_copy (PG6 verbatim: both fold-5 shapes, 56B capture
elements, copy-semantics mutation pin, want 139), spread_place_kinds
(str 24B headers / narrow i32 / empty deref source),
spread_growth_place (40-elem spread crossing cap doublings),
spread_selfalias_chain (source header inside the dst's grown buffer),
and the two new loud-tail rejects (CALL rvalue, [N]T array) pinning
the "#35:" diagnostic on both stages. 87 fixtures green (was 70),
per-row cs/ww asm byte-cmp included.
Unblocks regex fold-5a: add_thread regex.ha:569/572 + search ha:820
spreads go from loud-bound to real spread.
Hojun-Cho
0ce98cc5dc