Flight Log / dotnet/fsharp #18737
Eenable LanguageFeature.UnmanagedConstraintCsharpInterop for F# 10.0 — a GitHub Copilot (GitHub) bot flight
The GitHub Copilot bot (GitHub) opened this pull request in dotnet/fsharp on Jul 7, 2025; merged after rework in 4.3 d: +553 −389, 53 files, 8 reviews.
Flown by
- Lines
- +553 −389
- Files
- 53
- Commits
- 8
- Reviews
- 8 (1 ✕)
- To merge
- 4.3 d
- Task
- fix
Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.
GitHub Copilot took a fix task in dotnet/fsharp to re-enable the UnmanagedConstraintCsharpInterop language feature, aiming to resolve a TypeLoadException with unmanaged constraints in lambda expressions. The change spanned 53 files, with 553 additions and 389 deletions across eight commits. Review drew one change request and 10 comments. It merged after rework, 102.2 hours later.
“The feature UnmanagedConstraintCsharpInterop generates invalid IL in the Specialize method. Add tests in the ComponentTests projects. Add a test to verify the exact reported issue”
— from the review (source)
From the pull request description
## Summary Re-enables the `UnmanagedConstraintCsharpInterop` language feature for F#109.0 to fix a TypeLoadException that occurs when using unmanaged constraints in lambda expressions. ## Problem ```fsharp open System let printTypeConstraintsNative<'T when 'T : unmanaged> () = printf $"Hel…
Excerpt (first 300 characters) — the full description is on GitHub.
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Flight timeline
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- —reviewed
- —committedcopilot-swe-agent[bot]
- —committedTomas Grosup
- —committedTomas Grosup
- —committedTomas Grosup
- Jul 7, 2025changes requestedT-Gro↗
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Cite this flight: AgentRiders Flight Log, dotnet/fsharp#18737, record updated Nov 3, 2026, https://agentriders.com/logs/dotnet/fsharp/18737/
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