The wcc test drivers ran `ww build <bare-/tmp src>` with no -o, so the
compiler's <stem>.sepwork scratch landed beside the source and was never
cleaned: unbounded /tmp growth (2195 stale dirs observed) that fills tmpfs
and fabricates phantom test failures + silent harness aborts, and for
in-repo fixture builds leaked .sepwork into the tracked tree.
Each leaking build now writes its source + output inside a per-invocation
tmpdir, passes -o <tmpdir>/<stem> so the .sepwork lands inside it, and
rm -rf's the tmpdir on every exit path -- including fopen-fail and the
expected-fail reject builds (scratch is mkdir'd before the build can fail).
`ww run` and explicit-`-o`/byte-id helpers are left as-is; the 990/993
byte-id comparison logic is byte-for-byte unchanged.
Two items filed separately (this commit holds the no-Makefile / no-main.c
rail):
- #13: a stale <src>.s byte-id readback (749) silently no-ops since
separate-compile emits .s to <ostem>.sepwork/__root.s; documented inline.
- #14: build-system Makefile recipes build selfhost/cmd/*/main.ww with no
-o and leak main.sepwork in-tree (bounded, gitignored; own commit).
One concern -- sepwork leak hygiene -- across 228 drivers; uniform
transform applied per-file and two-round reviewed. make test: all 402
passed, zero net-new /tmp scratch, zero test-driven in-repo .sepwork.
def C:[N]str; C[i] was loud (undefined main.C) both stages. Three folded
fixes, one commit (splitting would ship a bisect point where wwstage
silently returns an element address instead of .len):
P0: the str-array static-init emitter dropped its vestigial directive
=="DATAW" gate so a def table rides the same DATAW-header + DATAR-reloc
path as let. A def str/slice table lives in DATAW by w6a's A_DATAR-holder
constraint -- placement only; def immutability stays checker-enforced.
P1: let_pre_intern / letpreintern walked N_LET only, so a def str-array's
element string-literals were never interned (dangling _S_n). Extracted a
pre_intern_strarray SSoT helper, called for a def str-array arm too, both
stages. Scoped to str fixed arrays; def []T / def [N][]T stay loud (#270).
P2: wwstage cgenexpr lacked a defvartnode fallback in the indexed-element
classify, so a def str-array element load returned the element address
instead of the slice header -- a silent miscompile. One line, aligning
wwstage up to cstage (which was correct). C[1].len now = 3 both stages,
byte-identical.
byte-id 990-997 8/8; w6c/w6c_ww move. test/wcc/819 table-driven. The
def-global scalar str index sibling (def S:str; S[0]) stays task #14.
