w6c_ww and wwdump_ww (-c mode) silently passed source into cgen
without type-checking it; any type error flowed through as broken
asm with exit 0. Mirror cstage cmd/w6c/main.c:73-75: between the
parse-error gate and cgeninit, install typesinit + checkinit +
checkfile + `if (ck.errs > 0) return 1;`. Cgen path unchanged —
drivers own check, cgen owns emit (checkfile not idempotent due to
installdecl scopedefine).
The wire-up was blocked by five latent check.ww divergences from
cstage, all landed first: cross-module type refs (#51), enum-int
reinterprets (#52), per-block scoping (#53), nominal-first
tagged-variant inclusion (#55), and same-module N_IDENT callee
preference (#56). With those clear, the broader exercise of
check across every selfhost driver reaches 131/131 first try.
994_w6c_ww grows by one row: a trivially-wrong `let x: i32 =
"hello";` smoke pins both stages to exit-non-zero. Pre-#50 it
emitted 202 bytes of broken asm with exit=0.
Unblocks #42 (size/align/offset wwstage intercepts) and the
audit-§1.8 UP-polarity refactor (node.type_ population can now
land in the same check pass we just wired up).
Hojun-Cho
c58d3511e8