March 2025

Issues

• Visual Studio Debugger error dialog: "To prevent an unsafe abort when evaluating the function *.__DebugDisplay" all threads where allowed to run.

  Area-DebugBugImpact-High
  Bug

  dotnet/fsharp#18305 · Filter by author smoothdeveloper opened on Feb 10, 2025 · March 2025
  5

  

• Discriminated union .Is* properties causing compile time error

  Area-Compiler-CodeGenBugImpact-High
  Bug

  dotnet/fsharp#18263 · Filter by author p5ych08illy opened on Jan 23, 2025 · March 2025
  7

  

• #r "nuget: .." in VisualFSI produces an interesting warning

  Area-VS-FSIBugImpact-Low
  Bug

  dotnet/fsharp#18357 · Filter by author KevinRansom opened on Mar 4, 2025 · March 2025

• Issue with consuming DLL when using LangVersion set to 8.0 with .NET SDK 9

  BugImpact-HighRegression
  Bug

  dotnet/fsharp#18003 · Filter by author ljb opened on Nov 14, 2024 · March 2025
  1

  

• Type extension issue with allows ref struct

  Area-Compiler-CheckingArea-Compiler-Checking-ByrefArea-Compiler-ImportAndInteropBugImpact-HighRegression
  Bug

  dotnet/fsharp#18001 · Filter by author bent-rasmussen opened on Nov 14, 2024 · March 2025
  17

  

• LSP switch from NewtonsoftLanguageServer to SystemTextJsonLanguageServer

  Area-LSP
  Task

  dotnet/fsharp#18068 · Filter by author 0101 opened on Nov 27, 2024 · March 2025
  1

• F# VisualStudio 2022 text editor erases pipe of array expression closing bracket when issuing match in a for loop

  AI-thinks-windows-onlyArea-VS-EditorBugImpact-High
  Bug

  dotnet/fsharp#18119 · Filter by author smoothdeveloper opened on Dec 9, 2024 · March 2025

• Null pointer reference (NRE) when referencing a point free function (FSharpFunc?) from a console app without a main method

  Area-Compiler-CodeGenBugFeature ImprovementTheme-Simple-F#
  Bug

  dotnet/fsharp#18259 · Filter by author bjartwolf opened on Jan 22, 2025 · March 2025
  9