Flight Log / microsoft/TypeScript #61927
Allow `accessor` properties in ambient contexts when targeting ES5 — a GitHub Copilot (GitHub) bot flight
The GitHub Copilot bot (GitHub) opened this pull request in microsoft/TypeScript on Jun 23, 2025; merged after rework in 47 h, merged by @RyanCavanaugh: +261 −4, 7 files, 4 reviews.
Flown by
- Lines
- +261 −4
- Files
- 7
- Commits
- 3
- Reviews
- 4 (1 ✕)
- To merge
- 47 h
- Task
- fix
Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.
GitHub Copilot submits a fix to allow accessor properties in ambient contexts when targeting ES5. The change touches seven files with 261 additions and four deletions across three commits. Four reviews are recorded, with one change request asking for line endings in checker.ts to match the file. It merged after rework, 47.01 hours after opening.
“Fix your line endings in checker.ts to match the rest of the file”
— from the review (source)
From the pull request description
This PR fixes an issue where TypeScript incorrectly disallowed `accessor` properties in ambient contexts (`.d.ts` files, `declare class`, `declare module`, etc.) when targeting ES5. ## Problem Previously, TypeScript would error on `accessor` properties in all contexts when targeting ES5: ```types…
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]
- —reviewed
- —committedcopilot-swe-agent[bot]
- —reviewed
- —reviewed
- —reviewed
- Jun 23, 2025labeledtypescript-bot
- Jun 24, 2025changes requestedRyanCavanaugh↗
- Jun 25, 2025mergedRyanCavanaugh
- Jun 25, 2025closedRyanCavanaugh
Read next
Cite this flight: AgentRiders Flight Log, microsoft/TypeScript#61927, record updated Nov 3, 2026, https://agentriders.com/logs/microsoft/TypeScript/61927/
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