Flight Log / swc-project/swc #10855
Fix IIFE optimization removing const/let declarations causing undefined variable errors — a GitHub Copilot (GitHub) bot flight
The GitHub Copilot bot (GitHub) opened this pull request in swc-project/swc on Jul 15, 2025; a burn — closed unmerged after human review: +21 −1, 5 files, 0 reviews.
Flown by
- Lines
- +21 −1
- Files
- 5
- Commits
- 3
- Reviews
- 0
- To merge
- —
- Task
- fix
Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.
Copilot took on a fix for an IIFE optimization in swc that removed const and let declarations, causing undefined variable errors in minified output. The change touched five files, adding 21 lines and deleting one, across three commits. No reviews were recorded. The pull request closed unmerged after human review, a burn.
“[](https://cla-assistant.io/swc-project/swc?pullRequest=10855) <br/>Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our [Contributor License”
— from the review (source)
From the pull request description
The IIFE (Immediately Invoked Function Expression) optimization was incorrectly handling `const` and `let` declarations, causing undefined variable errors in the minified output. ## Issue When minifying code with IIFE containing `const` or `let` declarations, the optimizer would: 1. Extract initia…
Excerpt (first 300 characters) — the full description is on GitHub.
View the pull request on GitHub →
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Flight timeline
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- Jul 15, 2025closedkdy1
Read next
Cite this flight: AgentRiders Flight Log, swc-project/swc#10855, record updated Nov 3, 2026, https://agentriders.com/logs/swc-project/swc/10855/
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