emit_lets / emitletdataw's scalar-8B and array arms only matched bare
N_INTLIT / N_RUNELIT / N_TRUE / N_FALSE / N_NIL on the let rhs. `let
x: i8 = -1i8;` arrives as N_UN(TK_MINUS, N_INTLIT(1)) — none of those
— so cstage's scalar arm hit `else continue;` and dropped the DATAW
row entirely; the array arm bailed at the first non-foldable element
and the skip-array-with-non-NIL-rhs fall-through dropped the whole
row. Wwstage's mirror arms silently emitted zero bytes for negative
literals in both shapes.
Severity split — cstage symptom is no DATA emit, the linker fails
loudly at build time. Wwstage symptom is silent-zero element
substitution for negative array values: compiles, runs, returns
wrong answers. Corpus-coverage-blind on the wwstage side, only
surfaces when a consumer reads the wrong value. Single N_UN-fold
helper application retires both symptoms across both stages. Fourth
corpus-coverage-blind unmask this session (catalog: i64 div/mod CQO
#16, IDENT-local /= no-op, #21 call-arg DX drop, now #19 wwstage
silent-zero).
Route all four sites through fold_int_literal / foldintliteral, the
same helper #24 used on the def-emit side (which already covered
N_UN over the leaf set). The wwstage array arm also picks up an
N_CAST peel and drops a dead non-`...` N_FIELD branch (the parser
never emits non-`...` N_FIELD inside an N_ARRLIT — only as the `...`
repeat marker). Same-path sibling cleanup; rule-11 justified.
Tests:
- 719_signed_data_emit asserts DATAW <sym>(SB),"<bytes>" lines are
present in both stages' .s for the {i8, i16, i32, i64} × {scalar,
1D array} matrix, plus cmp -s byte-id between stages per row.
Corpus-coverage-blind sentinel per rob's STATUS-3 note.
- 923_signed_data_emit_run runtime-pins the same matrix plus a
TK_TILDE row through cstage and wwstage drivers.
995_self_rebuild stays green (ww2==ww3==ww4 byte-id).
