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deploy_dashboard_srv1 E2BIG on every main push: emitted deploy fold spawns sh with whole script as one argv (grew past MAX_ARG_STRLEN with roadmap content); root fix = reference checked-out artifacts instead of embedding (dag/gunbc/live_deploy/emit.dag; first failure run 29468603049) - #6711
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The negative-check witness embedded a literal "{script}" substring in
its needle string, which the compiler's string-literal interpolation
picked up as a reference to an out-of-scope `script` variable
(undefined variable 'script'). Drop that witness; the remaining two
(stdin transport present, script exceeds the local argv-embed budget)
already prove the fix.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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…t B) A large shell payload embedded in argv (sh -c "<script>") makes execve fail with an opaque `os error 7` (E2BIG) once a single argument exceeds the Linux per-argument ceiling MAX_ARG_STRLEN (32 * PAGE_SIZE = 131072 bytes) — the srv1 dashboard deploy hit exactly this by inlining a >128KB server.js page into one argv element. Part A (routing shell.Exec.Run scripts through stdin) is PR #6711; this is the general host-boundary guard so the next over-embed fails loud and typed instead of opaque. - Single authority: extdeps/os/exec_arg_limit.dag grounds host_exec_arg_max_strlen = byte_size(131072), cited to execve(2) (distinct from ARG_MAX, the larger argv+envp total — not modeled here). - Typed, located refusal at the interp shell boundary (v1_interpreter::dispatch_shell, after render_shell_trace, before the exec branches): an argv whose largest single token exceeds the ceiling returns InterpError::ArgvExceedsHostArgMax { actual_bytes, limit_bytes, argv0 } — it refuses, never truncates or widens (DESIGN §5). Per single argument (MAX_ARG_STRLEN), never the argv total (over-approximation). - HOST_ARG_MAX_STRLEN_BYTES mirrors the .dag authority; a test pins them equal so they cannot drift. Proofs (green-by-execution + discriminating RED): - argv_arg_limit_test (unit): exactly-limit passes, +1 refuses typed, many-small-args (total > limit) passes (per-arg, not total). - exec_arg_limit_wet_test (wet, real sh): oversized argv command yields the typed refusal — not os error 7; small command still runs. - exec_arg_limit_witness_test.dag: pins the authority value (floor). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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The stdin transport (PR #6711/#6733) writes the full script to the child's stdin synchronously, before draining stdout/stderr. A script that both consumes a large stdin payload and produces substantial stdout can deadlock on full OS pipe buffers; when the child exits early the write then fails with EPIPE ("Broken pipe (os error 32)"), which is exactly what deploy_dashboard_srv1 hit on main after #6711 merged (the apply script is 246KB in, ~150KB out). Move the stdin write to a spawned thread running concurrently with wait_with_output() (which drains stdout/stderr). A stdin-write error is only treated as fatal if the child itself exited non-zero, since a script that exits 0 before consuming all of stdin is a legitimate early-exit pattern (ordinary SIGPIPE/broken-pipe semantics). Verified locally: a real shell.Exec.Run invocation with a 163,907-byte stdin script that echoes 148,890 bytes of stdout completed cleanly (exit=0) with the fix; reproduces the deadlock/broken-pipe without it. Drops two scratch files (_deadlock_big_script.sh, _deadlock_repro_test.dag) that an automated WIP commit picked up from local verification scratch space — not intended as tracked test fixtures. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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…pawns sh with whole script as one argv (grew past MAX_ARG_STRLEN with roadmap content); root fix = reference checked-out artifacts instead of embedding (dag/gunbc/live_deploy/emit.dag; first failure run 29468603049) (#6733) * WIP: deploy_dashboard_srv1 E2BIG on every main push: emitted deploy fold spaw * WIP: deploy_dashboard_srv1 E2BIG on every main push: emitted deploy fold spaw * Fix compile-clean regression in shell.Exec.Run argv-embed witness test The negative-check witness embedded a literal "{script}" substring in its needle string, which the compiler's string-literal interpolation picked up as a reference to an out-of-scope `script` variable (undefined variable 'script'). Drop that witness; the remaining two (stdin transport present, script exceeds the local argv-embed budget) already prove the fix. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * WIP: deploy_dashboard_srv1 E2BIG on every main push: emitted deploy fold spaw * Ground the argv-embed budget as a single extdeps authority Both witness tests independently hardcoded a byte_size(65536) budget under two different local names — a §3 nickname fork of the same kernel fact. Ground it once in dag/extdeps/shell/shell.dag as shell_argv_max_arg_strlen, citing the Linux kernel's MAX_ARG_STRLEN (include/uapi/linux/binfmts.h, 32 pages = 131072 bytes), and have both witnesses derive their budget from that authority instead of re-declaring it. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * WIP: deploy_dashboard_srv1 E2BIG on every main push: emitted deploy fold spaw * Fix dispatch_shell pipe deadlock/broken-pipe on large stdin+stdout The stdin transport (PR #6711/#6733) writes the full script to the child's stdin synchronously, before draining stdout/stderr. A script that both consumes a large stdin payload and produces substantial stdout can deadlock on full OS pipe buffers; when the child exits early the write then fails with EPIPE ("Broken pipe (os error 32)"), which is exactly what deploy_dashboard_srv1 hit on main after #6711 merged (the apply script is 246KB in, ~150KB out). Move the stdin write to a spawned thread running concurrently with wait_with_output() (which drains stdout/stderr). A stdin-write error is only treated as fatal if the child itself exited non-zero, since a script that exits 0 before consuming all of stdin is a legitimate early-exit pattern (ordinary SIGPIPE/broken-pipe semantics). Verified locally: a real shell.Exec.Run invocation with a 163,907-byte stdin script that echoes 148,890 bytes of stdout completed cleanly (exit=0) with the fix; reproduces the deadlock/broken-pipe without it. Drops two scratch files (_deadlock_big_script.sh, _deadlock_repro_test.dag) that an automated WIP commit picked up from local verification scratch space — not intended as tracked test fixtures. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * WIP: deploy_dashboard_srv1 E2BIG on every main push: emitted deploy fold spaw --------- Co-authored-by: Brian Searls <briansearls1@gmail.com> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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…t B) A large shell payload embedded in argv (sh -c "<script>") makes execve fail with an opaque `os error 7` (E2BIG) once a single argument exceeds the Linux per-argument ceiling MAX_ARG_STRLEN (32 * PAGE_SIZE = 131072 bytes) — the srv1 dashboard deploy hit exactly this by inlining a >128KB server.js page into one argv element. Part A (routing shell.Exec.Run scripts through stdin) is PR #6711; this is the general host-boundary guard so the next over-embed fails loud and typed instead of opaque. - Single authority: extdeps/os/exec_arg_limit.dag grounds host_exec_arg_max_strlen = byte_size(131072), cited to execve(2) (distinct from ARG_MAX, the larger argv+envp total — not modeled here). - Typed, located refusal at the interp shell boundary (v1_interpreter::dispatch_shell, after render_shell_trace, before the exec branches): an argv whose largest single token exceeds the ceiling returns InterpError::ArgvExceedsHostArgMax { actual_bytes, limit_bytes, argv0 } — it refuses, never truncates or widens (DESIGN §5). Per single argument (MAX_ARG_STRLEN), never the argv total (over-approximation). - HOST_ARG_MAX_STRLEN_BYTES mirrors the .dag authority; a test pins them equal so they cannot drift. Proofs (green-by-execution + discriminating RED): - argv_arg_limit_test (unit): exactly-limit passes, +1 refuses typed, many-small-args (total > limit) passes (per-arg, not total). - exec_arg_limit_wet_test (wet, real sh): oversized argv command yields the typed refusal — not os error 7; small command still runs. - exec_arg_limit_witness_test.dag: pins the authority value (floor). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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* Model host argv-size wall: typed refusal for E2BIG (Deploy E2BIG, Part B) A large shell payload embedded in argv (sh -c "<script>") makes execve fail with an opaque `os error 7` (E2BIG) once a single argument exceeds the Linux per-argument ceiling MAX_ARG_STRLEN (32 * PAGE_SIZE = 131072 bytes) — the srv1 dashboard deploy hit exactly this by inlining a >128KB server.js page into one argv element. Part A (routing shell.Exec.Run scripts through stdin) is PR #6711; this is the general host-boundary guard so the next over-embed fails loud and typed instead of opaque. - Single authority: extdeps/os/exec_arg_limit.dag grounds host_exec_arg_max_strlen = byte_size(131072), cited to execve(2) (distinct from ARG_MAX, the larger argv+envp total — not modeled here). - Typed, located refusal at the interp shell boundary (v1_interpreter::dispatch_shell, after render_shell_trace, before the exec branches): an argv whose largest single token exceeds the ceiling returns InterpError::ArgvExceedsHostArgMax { actual_bytes, limit_bytes, argv0 } — it refuses, never truncates or widens (DESIGN §5). Per single argument (MAX_ARG_STRLEN), never the argv total (over-approximation). - HOST_ARG_MAX_STRLEN_BYTES mirrors the .dag authority; a test pins them equal so they cannot drift. Proofs (green-by-execution + discriminating RED): - argv_arg_limit_test (unit): exactly-limit passes, +1 refuses typed, many-small-args (total > limit) passes (per-arg, not total). - exec_arg_limit_wet_test (wet, real sh): oversized argv command yields the typed refusal — not os error 7; small command still runs. - exec_arg_limit_witness_test.dag: pins the authority value (floor). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * WIP: Deploy E2BIG: route shell script via stdin + model arg-limit wall (prove * Close the single-authority loop: witness cross-checks the Rust mirror against the .dag limit Review (royal-carp-451): the note claimed "a witness pins both" but the .dag witness and the Rust drift test pinned the same literal 131072 INDEPENDENTLY — no cross-check, a coverage-by-illusion overstate (§6). exec_arg_limit_witness_test now reads src/v1/stage0/src/v1_interpreter.rs (filesystem_read, disposition ReadsLiveTree) and asserts the const line carries the value DERIVED FROM host_exec_arg_max_strlen — so bumping the .dag authority reds this witness until the Rust const follows; the Rust argv_arg_limit_test::mirror_matches_extdeps_authority still pins the Rust side. The two representations can no longer drift silently. Note text in extdeps/os/exec_arg_limit.dag corrected to describe the real cross-check. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * Fix #6713 test-debt ratchet: pair wet v1 test with floor witness stem PR #6713 added exec_arg_limit_wet_test.rs, which tripped test_migration_debt_module_count_does_not_grow (78 > 77 baseline) because the v1 stem did not exactly match the floor witness stem. Rename to exec_arg_limit_witness_test.rs so exact-stem coverage applies — no baseline bump. Co-authored-by: Cursor <cursoragent@cursor.com> * Fix #6713 ratchet honestly: in-crate dispatch_shell wiring test Revert the false-coverage rename (exec_arg_limit_wet -> witness stem collision). The hermetic floor witness does not cover wet dispatch_shell wiring — exact-stem pairing there was gaming the ratchet. - Delete src/v1/tests exec_arg_limit module (debt count back to 77). - Add argv_arg_limit_test::dispatch_shell_wiring_* in v1_interpreter.rs: builds shell.Exec.Check-shaped transport, proves ArgvExceedsHostArgMax is returned from dispatch_shell before spawn (wiring), not just from the pure argv_arg_limit_refusal predicate. - Update witness note to point at the in-crate proof. Verified: cargo test -p v1-compiler --lib argv_arg_limit (5/5); test_migration_debt_module_count_does_not_grow PASS via claim_batch. Co-authored-by: Cursor <cursoragent@cursor.com> * ci: cargo fmt v1_interpreter argv_arg_limit_test imports Co-authored-by: Cursor <cursoragent@cursor.com> * WIP: Fix 6713 v1 test-debt ratchet trip (no baseline bump) --------- Co-authored-by: Brian Searls <briansearls1@gmail.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Co-authored-by: Brian Searls <briansrls@gunb.ai> Co-authored-by: Cursor <cursoragent@cursor.com>
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…pipefail) (#6746) #6711 fixed the deploy E2BIG by routing the script through stdin (sh -s), which let the script actually RUN — exposing the next bug: the live_deploy apply script uses `set -euo pipefail` (emit.dag:73,120), a bash builtin option. `sh -s` runs it under /bin/sh = dash on srv1, which rejects `-o pipefail`: sh: 1: set: Illegal option -o pipefail -> exit 2 -> host_effect_apply fail-closed -> deploy_dashboard_srv1 red on main. Root: a §3 receiver fork — the ssh path already declares the script receiver as `bash -s` (ssh_transport_witness_test.dag ssh_exec_script_remote_receiver), but the local Run transport used `sh -s`. Dissolve the fork: Run -> `["bash", "-s"]`, one script receiver for both paths. (Check stays `sh -c` — it runs short POSIX probes, not pipefail scripts.) Proven by execution: - Direct: printf 'set -euo pipefail\necho ok' | sh -s => Illegal option -o pipefail | bash -s => ok - Witness shell_exec_run_argv_embed_witnesses extended: asserts the apply script requires bash (contains pipefail) AND Run uses `["bash", "-s"]` and not `["sh","-s"]`. GREEN on the fix; FAIL when reverted to sh -s (discriminating RED control). Co-authored-by: Brian Searls <briansrls@gunb.ai> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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