fix: unexpected null pointer exception due to race condition #245
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Co-authored-by: JounQin <admin@1stg.me>
🦋 Changeset detectedLatest commit: ad8572b The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
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WalkthroughThis pull request introduces changes to allow releases on the 0.10.x branch. It includes a fix for a null pointer exception due to a race condition, updates to the package.json configuration, and adds new test files to ensure reliability. Changes
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Pull Request Overview
This pull request enables CI releases on the 0.10.x branch and addresses a race condition leading to unexpected null pointer exceptions in worker message handling.
- Introduces a new worker identity used by the runAsWorker function.
- Adds a reliability test that repeatedly verifies the worker’s identity function.
- Modifies the logic for receiving worker messages in src/index.ts to better handle potential race conditions and updates the package ignore files.
Reviewed Changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| test/worker-identity.js | New test worker using runAsWorker with a basic identity function |
| test/reliability.spec.ts | Adds a high-volume reliability test using createSyncFn |
| src/index.ts | Updates message handling to address race condition issues |
| package.json | Updates ignoreFiles configuration |
| .changeset/shiny-kids-check.md | Adds a changeset documenting the fix for the race condition |
Comments suppressed due to low confidence (1)
package.json:144
- Verify that changing ignoreFiles from "**/*.d.ts" to "lib" is intentional, and that it won't inadvertently affect the handling of declaration files.
"lib"
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Important
Looks good to me! 👍
Reviewed everything up to ad8572b in 1 minute and 39 seconds. Click for details.
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1. .changeset/shiny-kids-check.md:5
- Draft comment:
Clarify the race condition fix details for better context. - Reason this comment was not posted:
Comment did not seem useful. Confidence is useful =0%<= threshold50%The comment is asking for clarification on a race condition fix, which is not allowed as it falls under asking the PR author to explain or confirm their intention. This violates the rules.
2. package.json:144
- Draft comment:
Verify that ignoring the entire 'lib' directory (instead of '*.d.ts') for type coverage is intentional. - Reason this comment was not posted:
Comment did not seem useful. Confidence is useful =0%<= threshold50%The comment is asking the author to confirm their intention regarding ignoring the entirelibdirectory for type coverage. This falls under the rule of not asking the PR author to confirm their intention or to ensure the behavior is intended. Therefore, this comment should be removed.
3. src/index.ts:664
- Draft comment:
Consider replacing the recursive call in receiveMessageWithId with an iterative approach to avoid potential stack overflow on repeated unexpected messages. - Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 30% vs. threshold = 50% The recursive call is part of the changed code, as the diff shows the addition of the msg?.id null check and the recursive call. The suggestion to use iteration instead of recursion is a valid performance/safety concern since deep recursion can cause stack overflow. However, in this case, the recursion is unlikely to go very deep since it only recurses when receiving out-of-order messages, which should be rare. The current implementation is also clearer and easier to understand than an iterative version would be. I may be underestimating the frequency of out-of-order messages in a real-world scenario. If messages frequently arrive out of order, the recursion depth could become problematic. Even if messages do arrive out of order somewhat frequently, the recursion would only go as deep as the number of out-of-order messages, which is naturally limited by the messaging system. A stack overflow seems very unlikely in practice. While technically correct, this suggestion addresses a theoretical issue that is unlikely to cause problems in practice. The current recursive implementation is clearer and the risk of stack overflow is minimal.
4. test/reliability.spec.ts:5
- Draft comment:
High iteration count (1e6 runs) in the reliability test; ensure it only runs in CI to avoid local performance issues. - Reason this comment was not posted:
Comment looked like it was already resolved.
Workflow ID: wflow_1SBLTXop8Mldz0We
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## 0.10.x #245 +/- ##
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+ Coverage 86.80% 86.85% +0.04%
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Files 1 1
Lines 288 289 +1
Branches 137 138 +1
==========================================
+ Hits 250 251 +1
- Misses 31 38 +7
+ Partials 7 0 -7 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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📊 Package size report 0.5%↑
Unchanged files
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commit: |
related #217
Important
Fixes race condition in
startWorkerThreadand adds reliability test insynckit.startWorkerThreadinsrc/index.tsby checking for undefined messages.reliability.spec.tsto run 1 million iterations of a sync function to ensure stability.package.jsonto changeignoreFilesfrom**/*.d.tstolibfor type coverage.shiny-kids-check.mdto document the patch fix for the race condition.This description was created by
for ad8572b. You can customize this summary. It will automatically update as commits are pushed.