Issues

• Question about changed behavior of string interpolations in NativeAOT in the .NET 11 rc1 SDK

  BugNeeds-Triage
  Bug

  dotnet/fsharp#20757 · Filter by author Numpsy opened on Oct 10, 2026 · Updated on Oct 10, 2026 · Backlog

• Crash when using code quotations in tests

  BugImpact-Low
  Bug

  dotnet/fsharp#14225 · Filter by author tmoers opened on Nov 3, 2022 · Updated on Oct 10, 2026 · Backlog
  2

• Caches.Cache: its finalizer keeps a dropped check alive for one more full GC, and MailboxProcessor-mode caches are never collected

  Needs-Triage
  dotnet/fsharp#20756 · Filter by author nojaf opened on Oct 10, 2026 · Updated on Oct 10, 2026 · Backlog

• TransparentCompiler ignores keepAllBackgroundSymbolUses and enableBackgroundItemKeyStoreAndSemanticClassification, and caches every file's name resolution sink

  Needs-Triage
  dotnet/fsharp#20755 · Filter by author nojaf opened on Oct 10, 2026 · Updated on Oct 10, 2026 · Backlog

• Type mismatch reported for interpolated strings with multiple % specifiers in IDE checking

  BugNeeds-Triage
  Bug

  dotnet/fsharp#20752 · Filter by author auduchinok opened on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog

• TransparentCompiler: scripts read #load'ed files through the global FileSystem, and DocumentSource.Custom gives new versions on every call

  Needs-Triage
  dotnet/fsharp#20750 · Filter by author nojaf opened on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog
  1

• [Repo Assist] Monthly Activity 2026-10

  automationrepo-assist
  dotnet/fsharp#20672 · Filter by author github-actions opened on Oct 1, 2026 · Updated on Oct 9, 2026

• Intellisense for F# external SqlDataConnection type provider broken in v16.10.0

  Area-TypeProvidersBugImpact-MediumRegression
  Bug

  dotnet/fsharp#12078 · Filter by author vsfeedback opened on Sep 1, 2021 · Updated on Oct 9, 2026 · Backlog
  9

• Remove always-on language-feature flags (stable since ≤ F# 8.0)

  dotnet/fsharp#20139 · Filter by author T-Gro opened on Aug 4, 2026 · Updated on Oct 9, 2026 · Backlog
  

• Remove always-on language feature flag: ExpandedMeasurables

  dotnet/fsharp#20157 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog
  

• Compile generic extension forwarding without optimization

  BugNeeds-Triage
  dotnet/fsharp#20685 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog

• Preserve competing extension witnesses across files

  BugNeeds-Triage
  dotnet/fsharp#20684 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog

• Preserve extension SRTP constraints across files

  BugNeeds-Triage
  dotnet/fsharp#20683 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog

• Remove always-on language feature flag: ErrorOnDeprecatedRequireQualifiedAccess

  dotnet/fsharp#20168 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog
  

• Remove always-on language feature flag: WarningWhenMultipleRecdTypeChoice

  dotnet/fsharp#20192 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog
  

• Missing null guards in FSharpAsync; exceptions in continuations

  Area-AsyncArea-LibraryBug
  Bug

  dotnet/fsharp#20613 · Filter by author bartelink opened on Sep 22, 2026 · Updated on Oct 9, 2026 · Backlog

• Remove always-on language feature flag: WarningWhenTailRecAttributeButNonTailRecUsage

  dotnet/fsharp#20196 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog
  

• Remove always-on language feature flag: MatchNotAllowedForUnionCaseWithNoData

  dotnet/fsharp#20183 · by Filter by author T-Gro was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog
  

• Lack of error from language service masks build error in error list

  Area-LangService-DiagnosticsBugImpact-Medium
  Bug

  dotnet/fsharp#6036 · by Filter by author cartermp was closed on Oct 9, 2026 · Updated on Oct 9, 2026 · Backlog
  3

• Support 'protected abstract'

  Area-Compiler-ImportAndInteropBugImpact-Low
  Bug

  dotnet/fsharp#12281 · Filter by author kostya9 opened on Oct 19, 2021 · Updated on Oct 9, 2026 · Backlog
  3

• Remove always-on language feature flag: StringInterpolation

  dotnet/fsharp#20150 · by Filter by author T-Gro was closed on Oct 8, 2026 · Updated on Oct 8, 2026 · Backlog
  

• Runtime async throws InvalidProgramException when awaiting upcast Task

  BugNeeds-Triage
  dotnet/fsharp#20686 · by Filter by author T-Gro was closed on Oct 8, 2026 · Updated on Oct 8, 2026 · Backlog
  1

• Remove always-on language feature flag: ReallyLongLists

  dotnet/fsharp#20171 · by Filter by author T-Gro was closed on Oct 8, 2026 · Updated on Oct 8, 2026 · Backlog
  

• Remove always-on language feature flag: ErrorForNonVirtualMembersOverrides

  dotnet/fsharp#20179 · by Filter by author T-Gro was closed on Oct 8, 2026 · Updated on Oct 8, 2026 · Backlog
  

• Remove always-on language feature flag: ConstraintIntersectionOnFlexibleTypes

  dotnet/fsharp#20177 · by Filter by author T-Gro was closed on Oct 8, 2026 · Updated on Oct 8, 2026 · Backlog