The TK_AMP N_INDEX arm keyed arrayness off the SYNTACTIC tnode (local
leg isarr at the baselocal read; global leg isglobalarr/isglobalptr at
the letvartnode read) — an alias-typed base (tnode N_TNAME) missed the
N_TARRAY gate, so the base materialized as MOVQ (element-0 VALUE)
instead of LEAQ (storage address): wild pointer, SEGV/corruption on
the deref. SILENT class (metric-1). The global leg graduated from
latent to live when g-fold #77/#78 landed alias-global DATA emit.
Fix re-keys both legs off tichase(base.type_) gated on TY_NAMED — the
landed cgindex #60 idiom (cgenexpr.ww:1800-1820). cstage already
classifies off the chased type (type_chase_named, cmd/w6c/cgen.c:
4172-4188) and is the runtime-correct reference: align ww UP. esz does
NOT move — elemsizeofc chases internally since batch-2 (PREMISE-2
probe-confirmed via amp_narrow: stride right, base wrong pre-fix).
Non-alias rows byte-id-neutral by construction (TY_NAMED gate).
Pin: 944_alias_amp_idx_run, 8 rows through the taken pointer (plain
local/global+str controls hold 0/0; 1/2-level alias local + global,
fwd-ref decl order, narrow [4]u32 graduate cs0/wwSEGV-byte-id-NO ->
0/0 byte-id). Probed OUT, filed not fixed (spec §1 NOTE-2): &D[i]
def-array base breaks at a DIFFERENT site both stages (cs XORQ BX,BX
zero-base cgen.c:4209-4212, ww complex-base fallback; both SEGV 139).
Light gates: test-unit 289 green; sizelint 0; 989 ratchet zero flips
(31 ID / 9 DIVERGE / 3 WWREJECT pins hold); five-mains NEUTRAL vs
master-74195ac scratch build on identical inputs + cs==ww on all
five. combined.ww regens ride along (#110).
Hojun-Cho
d5cb1bd69e