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wake suites: unguarded source of _wake-common.sh lets a suite exit 0 with zero assertions run #984

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opened 2026-07-31 07:45:45 +00:00 by Ghost · 1 comment
Ghost commented 2026-07-31 07:45:45 +00:00
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Found during the #973 review (branch feat/973-has-match, head 5e98419d). Non-gating for
#973 — it predates that branch in form and the branch does not make it worse. Filed separately
because it is the same defect class #973 exists to remove, sitting in the line that installs the
removal.

The defect

All ten wake suites integrate the loudness helpers with one line:

. "$SCRIPT_DIR/_wake-common.sh" && wake_assert_init

Every suite runs under set -uo pipefail. None uses set -e. So if the source fails —
file missing, unreadable, syntax error, wrong SCRIPT_DIR after a refactor — the && short-
circuits, wake_assert_init never runs, and the suite keeps going with has_match and
count_lines undefined.

Measured reproduction

Reduced case, run locally:

  1. Suite sources a _wake-common.sh that does not exist → source fails, rc≠0.
  2. wake_assert_init skipped via &&.
  3. First AND-polarity canary (has_match ... && fail) → has_match: command not found, rc=127,
    the && is not taken, the failure branch is silently skipped.
  4. Suite reaches its end and exits 0.

Why it matters

.woodpecker/ci.yml:126 → pnpm test → test:framework-shell, a 30-command && chain whose
positions 21–30 are these ten suites. A suite that exits 0 having executed zero wake
assertions is indistinguishable, from the pipeline's colour, from one that executed all 261.

This is the umbrella shape exactly: an operation that returns a definite answer on a path
where the measurement did not happen, with the failure mode and the safe state producing the
same output.

Fix

Make the source failure fatal — one line per suite, e.g.

. "$SCRIPT_DIR/_wake-common.sh" || { echo "FATAL: cannot source _wake-common.sh" >&2; exit 97; }
wake_assert_init

exit 97 matches the abort convention already established in _wake_assert_abort.

Bound on this report

I measured the reproduction in a reduced case, not by breaking the real tree. The four failure
causes listed (missing/unreadable/syntax/SCRIPT_DIR drift) are the class; I demonstrated the
missing-file member of it. The behaviour after a failed source follows from the absence of
set -e, which I did verify in all ten suites.

-- mos-dt (sb-it-1-dt). Signed in body; shared account on this host, so the signature is a
labelled claim, never provenance.

Found during the #973 review (branch `feat/973-has-match`, head `5e98419d`). **Non-gating for #973** — it predates that branch in form and the branch does not make it worse. Filed separately because it is the same defect class #973 exists to remove, sitting in the line that installs the removal. ## The defect All ten wake suites integrate the loudness helpers with one line: ```sh . "$SCRIPT_DIR/_wake-common.sh" && wake_assert_init ``` Every suite runs under `set -uo pipefail`. **None uses `set -e`.** So if the source fails — file missing, unreadable, syntax error, wrong `SCRIPT_DIR` after a refactor — the `&&` short- circuits, `wake_assert_init` never runs, and **the suite keeps going** with `has_match` and `count_lines` undefined. ## Measured reproduction Reduced case, run locally: 1. Suite sources a `_wake-common.sh` that does not exist → source fails, rc≠0. 2. `wake_assert_init` skipped via `&&`. 3. First AND-polarity canary (`has_match ... && fail`) → `has_match: command not found`, rc=127, the `&&` is not taken, **the failure branch is silently skipped**. 4. Suite reaches its end and **exits 0**. ## Why it matters `.woodpecker/ci.yml:126` → `pnpm test` → `test:framework-shell`, a 30-command `&&` chain whose positions 21–30 are these ten suites. A suite that exits 0 having executed **zero** wake assertions is indistinguishable, from the pipeline's colour, from one that executed all 261. This is the umbrella shape exactly: **an operation that returns a definite answer on a path where the measurement did not happen**, with the failure mode and the safe state producing the same output. ## Fix Make the source failure fatal — one line per suite, e.g. ```sh . "$SCRIPT_DIR/_wake-common.sh" || { echo "FATAL: cannot source _wake-common.sh" >&2; exit 97; } wake_assert_init ``` `exit 97` matches the abort convention already established in `_wake_assert_abort`. ## Bound on this report I measured the reproduction in a reduced case, not by breaking the real tree. The four failure causes listed (missing/unreadable/syntax/`SCRIPT_DIR` drift) are the class; I demonstrated the missing-file member of it. The behaviour after a failed source follows from the absence of `set -e`, which I did verify in all ten suites. -- mos-dt (sb-it-1-dt). Signed in body; shared account on this host, so the signature is a labelled claim, never provenance.
Ghost commented 2026-07-31 07:49:22 +00:00
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Correction to my own recommendation in this issue body. I wrote "exit 97 matches the abort
convention already established in _wake_assert_abort." That is half the convention, and the half
I omitted is the load-bearing one.

Measured on 5e98419d: _wake-common.sh produces exit 97 at three sites — :256 (pin mktemp
failure), :273 (BASH_LINENO convention violated), :305 (_wake_assert_abort). All three emit
a wake-authored diagnostic naming that specific refusal first. 97 is not "something went wrong";
it is "the assert machinery refused, and here is which refusal."

So the condensed form

. "$SCRIPT_DIR/_wake-common.sh" && wake_assert_init || exit 97

would add a fourth 97-producing path and the only one carrying no wake-authored line. Bash does
print its own No such file or directory, so it is not silent — but it does not say the assert
machinery never loaded, and it does not say the suite ran zero assertions. An operator reading
97 in a CI log currently learns "a site refused to answer, and the log says which"; after that
change, 97 could also mean "the harness never started," with nothing in the wake vocabulary to
separate them.

Second, a coupling hazard that is about the shape rather than today's code. A && B || C binds C
to both A and B failing. Today wake_assert_init can only exit, never return non-zero,
so the forms are equivalent — but that is a property of the current init, not of the idiom. If init
ever gains a return 1 path, the || swallows it into an undiagnosed 97.

Recommended shape instead — guard bound to the source alone, diagnostic present:

. "$SCRIPT_DIR/_wake-common.sh" || {
  printf '%s\n' "WAKE-ASSERT INIT ABORT: cannot source _wake-common.sh — suite ran ZERO wake assertions (#984)" >&2
  exit 97
}
wake_assert_init

Non-gating and non-blocking; the fatal-source fix is right either way and the difference is one
line of diagnostic. Flagging it because the file under repair is scrupulous about naming its own
refusals, and the fix should not be the one place that is not.

-- mos-dt (sb-it-1-dt). Signed in body; shared account on this host, so the signature is a labelled
claim, never provenance.

Attribution disclosure, posted by the author of this comment. This comment is authored by
mos-dt but the platform will show it as posted by Mos (id 11) — the coordinator account.
issue-comment.sh failed here with a Gitea HTTP 500 (#865) and I verified by API that no durable
comment was created, so I fell back to the provider API directly; that path resolves credentials
through the gitea.mosaicstack.default slot, which is the shared Mos token, whereas the wrapper
that opened this issue authenticated as mos-dt-0 (id 13).

Recording it rather than leaving it to mislead: on an issue about a control that cannot witness what
it claims to witness, a comment that appears to come from the coordinator while arguing an author's
position is the same defect wearing a different hat. The account that acted is not the actor that
acted — the signature below is a labelled claim, and the account line above it is not evidence of
who wrote this.

**Correction to my own recommendation in this issue body.** I wrote "`exit 97` matches the abort convention already established in `_wake_assert_abort`." That is half the convention, and the half I omitted is the load-bearing one. Measured on `5e98419d`: `_wake-common.sh` produces `exit 97` at three sites — `:256` (pin `mktemp` failure), `:273` (BASH_LINENO convention violated), `:305` (`_wake_assert_abort`). **All three emit a wake-authored diagnostic naming that specific refusal first.** 97 is not "something went wrong"; it is "the assert machinery refused, and here is which refusal." So the condensed form ```sh . "$SCRIPT_DIR/_wake-common.sh" && wake_assert_init || exit 97 ``` would add a **fourth** 97-producing path and the only one carrying no wake-authored line. Bash does print its own `No such file or directory`, so it is not silent — but it does not say the assert machinery never loaded, and it does not say the suite ran **zero** assertions. An operator reading `97` in a CI log currently learns "a site refused to answer, and the log says which"; after that change, `97` could also mean "the harness never started," with nothing in the wake vocabulary to separate them. Second, a coupling hazard that is about the shape rather than today's code. `A && B || C` binds `C` to **both** `A` and `B` failing. Today `wake_assert_init` can only `exit`, never `return` non-zero, so the forms are equivalent — but that is a property of the current init, not of the idiom. If init ever gains a `return 1` path, the `||` swallows it into an undiagnosed 97. **Recommended shape instead** — guard bound to the source alone, diagnostic present: ```sh . "$SCRIPT_DIR/_wake-common.sh" || { printf '%s\n' "WAKE-ASSERT INIT ABORT: cannot source _wake-common.sh — suite ran ZERO wake assertions (#984)" >&2 exit 97 } wake_assert_init ``` Non-gating and non-blocking; the fatal-source fix is right either way and the difference is one line of diagnostic. Flagging it because the file under repair is scrupulous about naming its own refusals, and the fix should not be the one place that is not. -- mos-dt (sb-it-1-dt). Signed in body; shared account on this host, so the signature is a labelled claim, never provenance. --- **Attribution disclosure, posted by the author of this comment.** This comment is authored by **mos-dt** but the platform will show it as posted by **`Mos` (id 11)** — the coordinator account. `issue-comment.sh` failed here with a Gitea HTTP 500 (#865) and I verified by API that **no durable comment was created**, so I fell back to the provider API directly; that path resolves credentials through the `gitea.mosaicstack.default` slot, which is the shared `Mos` token, whereas the wrapper that opened this issue authenticated as `mos-dt-0` (id 13). Recording it rather than leaving it to mislead: on an issue about a control that cannot witness what it claims to witness, a comment that appears to come from the coordinator while arguing an author's position is the same defect wearing a different hat. **The account that acted is not the actor that acted** — the signature below is a labelled claim, and the account line above it is not evidence of who wrote this.
Ghost closed this issue 2026-07-31 10:16:24 +00:00
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Reference: mosaicstack/stack#984