Trace at the c3 tip: cs-vs-ww diff on l2_local/kb5_def93 = exactly ONE
line, a spurious `MOVQ (AX), AX`. The deciding site is the cgexpr
N_UN(STAR) pointee classify (`ru`): the single peel left a 2-LEVEL
alias pointee TY_NAMED, the ARRAY skip (#61-C — an array value IS its
address, #270-1a) missed, and the scalar load pulled a[0]'s VALUE as
the index base — wild pointer, SIGSEGV 139 on cs. KEN #263-POLARITY:
cs is the WRONG side; ww chases and is the runtime-correct reference —
cs converges on WW's asm. Single-site grant: the one `ru` computation
(shared by the FN/ARRAY/TAGGED skip predicates) → type_chase_named.
Raw `->under` in cgen.c 59→58. #93 CLOSES.
TRAIN INVARIANT holds at the tip: cs-only; _ww binaries bit-identical
to the bcd948d baseline md5s across all four commits. cs movers vs the
c3 tip bounded to EXACTLY the deref-index shapes: l2_local, kb4_x93,
kb5_def93. Zero ww movers. Detector pinned: kb4_xampdef STAYS 139/139
(#94, out-of-train — `&D[i]` indexed def base, a different site).
Graduations (cs SEGV-139 / ww 0, BYTE-DIVERGE → 0/0 BYTE-ID):
g93_l2_local (the banked rob spelling), g93_def (kb5_def93, the
natural `(*p)[2]` def twin). g93_1lvl_ctl (1-level control) held 0/0
byte-id throughout.
944_alias_cgen_b5_run 28→31 rows (84 checks); 944 family green;
sizelint 0.
Hojun-Cho
837fdb4753