fix(bundler): keep the failure that caused the ownership error - #3697
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Staging preview has been returning 500 with
[ext-bundler-esbuild] Cannot own an esbuild service started outside the
module-wide adapter
and the message is all there is: whatever actually failed is discarded
before anyone can read it.
`invokeEsbuild` records the latch up front, with no cause:
const ownershipError = recordOwnershipError(); // latch, no cause
return result.then(
() => { throw ownershipError; },
(cause) => { throw recordOwnershipError(cause); } // ??= -> cause dropped
);
Because the latch is set on the line above, the `??=` in
`recordOwnershipError` returns the existing causeless error and throws the
real one away. The latch is permanent, so every later operation in the
process reports a lifecycle problem that may not be what went wrong, and
the underlying failure is never visible anywhere.
Record the latch only once the operation settles, and let a cause arriving
later attach to an error created without one. Fold the cause into the
message too: callers log `error.message`, so a `cause` chain alone would
still not be printed.
This does not fix the staging failure. It makes it possible to see it.
📦 Client bundle boundary
A server module in a client graph aborts hydration in the browser. New leaks fail CI; known leaks are tracked in |
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📝 WalkthroughWalkthroughThe esbuild bundler preserves the first ownership error and adopts a later underlying cause when needed. It sanitizes and truncates cause details. Tests cover cause adoption, retention, formatting, and missing causes. ChangesOwnership error cause handling
Estimated code review effort: 2 (Simple) | ~15 minutes Merge Risk: ⚪ Minimal · up to The change preserves the underlying bundler failure so future errors are diagnosable without changing the intended bundling contract; no actionable merge-blocking risk remains after normal checks and review. Sequence Diagram(s)sequenceDiagram
participant EsbuildBundler
participant EsbuildOperation
participant OwnershipErrorLatch
EsbuildBundler->>EsbuildOperation: start bundling
EsbuildOperation-->>EsbuildBundler: resolve or reject
EsbuildBundler->>OwnershipErrorLatch: record ownership failure and cause
OwnershipErrorLatch-->>EsbuildBundler: return latched error
Possibly related PRs
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🧪 Generate unit tests (beta)
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Inline comments:
In `@extensions/ext-bundler-esbuild/src/esbuild-bundler.test.ts`:
- Line 9: Update the import in esbuild-bundler.test.ts to source afterEach,
describe, and it from the repository’s `#veryfront/testing/bdd.ts` module instead
of `@std/testing/bdd`.
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extensions/ext-bundler-esbuild/src/esbuild-bundler.test.tsextensions/ext-bundler-esbuild/src/esbuild-bundler.ts
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Review follow-ups.
Deferring the latch until the operation settled left a window where a
concurrent transform passed the admission check in runBundlerOperation
and drove esbuild while ownership was already known to be invalid. Latch
synchronously again; the cause still arrives, because the latch is
created without one and recordOwnershipError adopts the first cause
offered afterwards.
The cause is folded into a message that callers log, so it must not carry
a machine's filesystem layout: a compiled runtime resolves esbuild under
a temp directory and spawn errors quote that path verbatim. Reduce
absolute paths to their basename, keep only the first line so a stack
never reaches the message, and bound the length.
spawn /tmp/veryfront-esbuild-0.28.1-c3fd/esbuild ENOENT
-> spawn esbuild ENOENT
Also import the BDD helpers from the repo module rather than @std.
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Why
Staging preview has been 500ing since ~00:07 UTC with:
I could not determine the root cause, because the code discards it. That is what this PR fixes.
The defect
invokeEsbuildlatches the ownership error before the operation settles:recordOwnershipErrorusesesbuildOwnershipError ??= new Error(...). Since the line above already set the latch, the rejection path'scauseis silently thrown away — always, not just sometimes.The latch is permanent and process-wide, so one failure at cold start makes every subsequent transform report a lifecycle problem that may not be what actually went wrong, with no trace of the real error anywhere in the logs.
The fix
error.message(seeesm-transform,layout-orchestrator), so acausechain alone would still never be printed.What this does and does not do
It does not fix staging. It makes staging diagnosable — the next occurrence will name the real failure instead of the lifecycle message.
Worth stating plainly: the same masking is why #3690 looked like the fix and was not. That PR correctly identified
isLiveServicerejecting a live service whose exit fields areundefined, and it is in v0.1.1235 — but staging still fails identically on v0.1.1235, so something else is tripping the guard and we cannot see what.What I ruled out while chasing this
All tested against a Deno-compiled binary, since the failure is compiled-only:
createRequirereturns a differentchild_processthan esbuild usesspawnat load, defeating the patchchild_process.spawnat call timedeno compileESBUILD_BINARY_PATHunset / binary missing in the image0.28.1) in the podThat last one does reproduce a different compiled failure: without
ESBUILD_BINARY_PATH,spawnreturns undefined and esbuild throwsCannot read properties of undefined (reading 'unref'). Not staging's case, but it is one of the real errors this masking would hide.Validation
esbuild-bundler.test.ts: 7 passed (23 steps), including the pre-existing lifecycle-ownership test.deno lint/deno fmt --checkclean across the extension.esbuild-bundler.test.tshas a pre-existingTS2352onmain(arrived with fix(bundler): keep compiled renderer service live #3690's test); unrelated and untouched.Summary by CodeRabbit