- Task 5: net.close on every path out of a serve iteration (400
included) and the listener on stop; measured 4 -> 54 fds over 50
requests before, 4 -> 4 over 200 after. The loop's comment claimed
the iteration-end drop IS the close -- wrong twice (net.Conn is a
scalar, and a drop would not close an fd); it now says what is true
- Task 6: LW_SOAK=<seconds> in the acceptance script -- each mode under
load, resident+descriptor deltas against a WARMED baseline (warm-up
includes load: cold-to-high-water is not growth), 256 KiB / zero
tolerance; LW_ACCEPT_WOVM soaks another build
- the soak caught ~1.6 MiB/min of in-arena leaks ASan cannot see (the
arena is one allocation to LeakSanitizer); an arena size-class
census + pointer trace attributed five bugs:
- jparse_string sized every decoded string at "rest of the input"
and relabeled len after -- blocks filed on free lists their next
allocation never reads (fs.read_all's mis-size, again); copy out
exact, free at the taken size
- `!=` never dropped fresh operands (headers["authorization"] !=
"Bearer ${key}" leaked both sides per request); Ne now reaps as Eq
- an Int interpolation segment is a fresh int_to_text, not a borrow;
is_borrowed_value_t asks the segment's type
- json.encode(Ctor{...}) had no owner -- record + both field copies
leaked per tool call; its bespoke lowering now drops the argument
- a discarded expression statement owns its result: `pop(lines);`
leaked the popped element; reader builtins excluded
- after: arena live bytes flat per request on every handler; release
soak 30 s per mode watch 0 / run 0 / mcp +20 KiB, descriptors flat;
ASan build flat at 14600 KiB across 601686 requests in 90 s past its
~1200-request quarantine warm-up
- gates: oop-accept ALL CRITERIA MET, oop-e2e 71/0, woc-test 565/0,
wovm-test green, log-watcher 7/0 (soak opt-in, fast path <1 min)
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- blocking stdlib calls that PARK (net.accept, socket read/write,
time.sleep, a child wait) no longer restart the syscall when the
stop flag is set on an interruption: a server sitting in accept
ignored SIGTERM and only `kill -9` ended it
- a stop is NOT a trap -- builtin.h's WO_SYS_STOPPED carries no error
record and no catch handler sees it (`try` must not swallow
SIGTERM); the VM unwinds the whole stack through the same drop
machinery an uncaught trap uses, so nothing leaks on the way out
- wo_vm_call gained a third outcome (1 = stopped); the CLI maps it to
the status the program's own `return 0` would have given, and a
regular-file read keeps its plain EINTR retry -- it does not park
- an ASSIGNMENT was not an ownership boundary: `api_key =
j.mcp.apiKey` moved the field pointer into the local, so the local
aliased the record and the first unwind freed the same string twice
(SIGSEGV in class_free). `let` copied a Text place, assignment now
does too -- the same double free was latent on the normal exit path,
hidden by the order the compiler happens to emit drops in
- log-watcher-accept is 7 checks: the seventh is the stop itself, with
the hard kill demoted to a fallback whose use is the failure
- measured under ASan: mcp parked, mcp after traffic, watch and run
all exit rc 0 with zero leaks; SIGINT behaves as SIGTERM
- gates: oop-accept ALL CRITERIA MET, oop-e2e 71/0, woc-test 565/0,
wovm-test green, log-watcher 7/0
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- program mode built the entry's `multi Text` of arguments and never
freed it: the entry only BORROWS a parameter (never a `take`, and
the drop tables never drop one), so the runtime that built the
container owns it
- dropped after the entry returns and after a trap alike -- the
container outlives the unwind; `multi_free` recurses, so the
argument strings go with it
- one site covers both invocation shapes: `self_rc` picks the argv
offset, it does not build a second container
- measured: watch, run and the full MCP mix now report ZERO leaks
under ASan -- the clean baseline the soak (Task 6) reads against
- gates: oop-accept ALL CRITERIA MET, oop-e2e 71/0, wovm-test green,
log-watcher 6/0
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
- the drop tables track bindings only, so six shapes had no owner: a
comparison operand (`if parse_expr(s) == nil` abandoned a schedule
record and its five containers per cron line), a borrowed call
argument (a 1 KB string per MCP request), a container read's copy,
a loop's iterable, a projected record, and any of those escaped by
a `return` from inside the statement that built them
- `c[i]` is the one place expression whose register holds a COPY:
no second copy at a boundary (`let u = tokens[0]` copied twice and
abandoned the first), and a drop where every other place is left be
- never drop an argument register after a CALL — the callee's frame
overlaps it; the reap moved into call_window's pre-call stash
- a statement-owned temporary is parked in a LOCAL slot: a loop
reclaims every temp for its body, and the end-of-statement DROP was
releasing the loop counter instead of the record
- reader builtins (get/latest/key_at/val_at) keep arg0 alive — their
result points into it — but their key argument is ordinary
- measured: run 2 112 B -> 64 B, flat 8 s to 20 s; MCP mix 21 312 B /
63 -> 64 B / 1; every handler flat from 2 to 6 requests; the 64 B
left is Task 3's argv container
- gates: oop-e2e 71/0, woc-test 565/0, wovm-test green, log-watcher 6/0
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Measured on the workload's supervisor mode, eight seconds, clean SIGTERM exit:
run 1 051 040 B in 24 allocations -> 2 112 B in 19; watch 128 B in 2 -> 64 B in
1. corpus 71/0, woc runtest 565/0, wovm unit gates green, just log-watcher 6/0.
- owner.ml: `oclass_of` called `Text` a builtin scalar, so it was Copy and NO
Text local was ever dropped — that, not the missing stdlib table, was the
leak. Text is now Owned, which forces an answer for what it does at an
ownership boundary, and the answer is uniform: it is COPIED. Into a
container (push/set/`m[i] = v`, already true), into a field (SETF), out of a
function (return), into a binding (`let s = other`), and into a loop cursor.
The source keeps its value; a freshly built Text stays the caller's and is
dropped at the site
- owner.ml: resolve_callee answers for three shapes it never knew — reserved
stdlib members, builtins, and a class's `static` members — so their results
get a type, an owner and a drop
- vm/builtin: WO_B_TEXT_COPY, the one new builtin the rule needs; SETF copies a
TEXT field in; emit copies a Text read out of a container, bound from a
place, returned from a place, or loaded into a cursor, and drops a freshly
built one after a copying store
- sysio.c: fs.read_all/net.read allocated their cap then relabelled the buffer
with the short length — but wo_str_free sizes a block by its len (no size
headers, obj.h), so a 1 MiB buffer wearing a 30-byte length went onto a
32-byte free list and never came back. They copy out at the true size now
- two regressions the corpus caught, fixed in the same pass: a @gc value read
out of a container is a plain borrow, not an rc-counted alias; and push's @gc
escape is keyed on "push is not a user-declared fn" rather than "the callee
did not resolve", which stopped being true once builtins resolved
- docs: Task 1 closed in the executable plan with its before/after numbers, and
the status board's item 1 records the deeper root cause
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Every remaining item is now traced to a measurement on the sample; anything the
sample does not exercise is deferred by name with the measurement that says so.
- new plan docs/plan/compiler/2026-08-14-logwatcher-executable.md — six tasks
between "it runs" and "you can leave it running": the ownership pass learning
stdlib return types (>1 MB leaked in 8s of `run` mode, one fs.read_all
result), dropping a projected temporary (`for e in parse_dir(d).entries`
leaks the shell per rescan), the runtime's own argv container (128 B every
run), honouring the stop signal in blocking calls (a server in accept ignores
SIGTERM), closing accepted connections (net.close exists, unused), and a soak
that would have caught all of it. Opens with the measured starting point and
closes with an explicit out-of-scope list
- story 7 (log-watcher proof): status banner separating the met compile-and-run
half from the executable half, plus a new Given/When/Then — clean SIGTERM
exit, zero leaks, flat RSS and descriptors across a soak
- story 5: grammar half landed, strictness half deliberately deferred
- story 6: landed for the surface the workload uses, with the two lifetime
defects it exposed pointed at the new plan
- story 7b: recorded as off this workload's path, measured — the sample has no
@gc class, 0 RC_INC/RC_DEC against 78 DROPs
- 00-status.md: NEXT PLAN is the executable list; story table and in-progress
row point at the new plan; deferrals carry their evidence
- plan 8 (haxe-parity): banner now says on hold behind the executable plan, and
its task states are corrected — Task 5 shipped, Tasks 6 and 7 are half done
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
