dotnet/fsharp

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The F# compiler, F# core library, F# language service, and F# tooling integration for Visual Studio

Stars: 4.3k
Forks: 876
Open beginner issues: 0
Indexed issues: 1.1k
Avg merge: 4d 11h
Merged PRs (30d): 131

Dominant language: F#
License: MIT
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Open All

1143 open issues indexed

Improve error reporting: do-keyword missing in a query Open

Area-Diagnostics Feature Improvement Theme-Simple-F#

dotnet/fsharp#2799 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improve Error Reporting: Multi-line records Open

Area-Diagnostics Feature Improvement Theme-Simple-F#

dotnet/fsharp#2800 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Fields and methods on internal types are impossible to make public Open

Area-Compiler-Checking Feature Request

dotnet/fsharp#2820 · 20 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026
Wishlist: quick fix for "possible incorrect indentation" Open

Area-LangService-CodeFixes Feature Request

dotnet/fsharp#2834 · 2 comments · 7 reactions · 0 assignees · Indexed Sep 15, 2026
quickfix/refactor idea: convert Record to class with properties Open

Area-LangService-CodeRefactorings Feature Request

dotnet/fsharp#2836 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
improve smart indentation Open

Area-VS-Editor Feature Improvement

dotnet/fsharp#2848 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Quick fix to add missing pattern matching Open

Area-LangService-CodeFixes Feature Request

dotnet/fsharp#2886 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
FS0058 repeats for every let and member Open

Area-Diagnostics Feature Improvement Theme-Simple-F#

dotnet/fsharp#2948 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Suggestion: Allow Copy & Paste in Tooltips Open

Area-LangService-ToolTips Feature Improvement

dotnet/fsharp#2969 · 10 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Add "Convert to binary/hex" code fix Open

Area-LangService-API Area-LangService-CodeFixes Feature Request

dotnet/fsharp#3043 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add "Separate nibbles" code fix Open

Area-LangService-API Area-LangService-CodeFixes Feature Request

dotnet/fsharp#3044 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Error messages: "FS0039 : The value or constructor 'SomeNamespace' is not defined" Open

Area-Diagnostics Feature Improvement

dotnet/fsharp#3075 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Access protected const from base class in attribute Open

Area-Compiler-Checking Bug Impact-Low

dotnet/fsharp#3172 · 14 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
XML documentation in Visual Studio 2017 Open

Area-LangService-ToolTips Feature Improvement

dotnet/fsharp#3213 · 5 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
DebuggerStepThrough attribute is not respected for async, task and other CEs Open

Area-Debug Feature Request

dotnet/fsharp#3359 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Error Messages] Unhelpful error when trying to augment a generic type with concrete type parameters Open

Feature Improvement Theme-Simple-F#

dotnet/fsharp#3394 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
F# Interactive does not support namespace keyword when the code read from standard input Open

Area-FSI Feature Request

dotnet/fsharp#3409 · 3 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
Duplicate cases in match statement not producing compiler warnings if grouped Open

Area-Compiler-PatternMatching Bug

dotnet/fsharp#3448 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Operators starting with '>' don't get IDE features Open

AI-thinks-windows-only Area-LangService-Colorization Bug Impact-Low

dotnet/fsharp#3462 · 26 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
FS0236 "Directives inside modules are ignored" is incomplete and gives the wrong impression, directives inside modules are often allowed Open

Area-Diagnostics Feature Improvement

dotnet/fsharp#3486 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Syntax-coloring is not applied or removed when changing Build Action from None to Compile and vv Open

AI-thinks-windows-only Area-LangService-Colorization Bug Impact-Medium

dotnet/fsharp#3503 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Object Browser is not populated with assemblies refernced by fsproj Open

Area-VS Feature Request

dotnet/fsharp#3512 · 18 comments · 4 reactions · 0 assignees · Indexed Sep 15, 2026
Make FSharp.Core safe for SQL CLR with IL initonly (somehow) on static field 'empty' in Map Open

Feature Request

dotnet/fsharp#3535 · 13 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Problem: Unlike C#, the F# compiler allows multiple entries of assembly attributes Open

Area-Compiler-Checking Bug Impact-Low

dotnet/fsharp#3548 · 14 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Module marked with ModuleSuffix attribute is hidden by another module with the same name Open

Area-Compiler-Checking Area-Compiler-Checking-NameResolution Feature Improvement

dotnet/fsharp#3565 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Diagnostics] Better error message for conversion of fun to System.Func Open

Area-Diagnostics Feature Improvement

dotnet/fsharp#3568 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Funny behaviour for "member .. interface with .. end" on the same line Open

Area-Compiler-Syntax Feature Improvement

dotnet/fsharp#3585 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Async.DefaultCancellationToken susceptible to memory leaks Open

Area-Async Bug Impact-Medium

dotnet/fsharp#3590 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
fsi reference order matter Open

Area-FSI Bug Impact-Low

dotnet/fsharp#3600 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Build] Errors in fscomp.txt are not printed to the log Open

Contributor Pain Feature Improvement

dotnet/fsharp#3639 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Better error message when method call is resolved to a C# extension method instead of the type own one Open

Area-Diagnostics Feature Improvement

dotnet/fsharp#3652 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Raise a warning if an extension method is ignored Open

Area-Diagnostics Feature Improvement

dotnet/fsharp#3692 · 16 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
hidden variable names leak into normal namespace Open

Area-Compiler-PatternMatching Bug Impact-Medium

dotnet/fsharp#3705 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Suggestion: Auto-generate record fields when creating a record value Open

Area-LangService-CodeFixes Feature Request

dotnet/fsharp#3748 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improve Error Reporting: Unnecessarily vague pattern match warning Open

Area-Compiler-PatternMatching Feature Improvement Impact-Medium Theme-Simple-F#

dotnet/fsharp#3765 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Simplify Name should not simplify RQA Open

Area-LangService-Diagnostics Feature Improvement

dotnet/fsharp#3778 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Oddities in statically resolved method constraints and method overloading Open

Area-Compiler-SRTP Bug Impact-Medium

dotnet/fsharp#3814 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Follow inheritdoc Open

Feature Improvement

dotnet/fsharp#3827 · 0 comments · 7 reactions · 0 assignees · Indexed Sep 15, 2026
Query headOrDefault and exactlyOneOrDefault with a struct/tuple Open

Area-Queries Bug Impact-Low

dotnet/fsharp#3845 · 13 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Optimisation failure with structs in referenced projects Open

Area-Compiler-Optimization Bug Impact-Medium

dotnet/fsharp#3923 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Provide a way to check if FSharpSymbolUse is resolved from id Open

Area-LangService-AutoComplete Feature Improvement

dotnet/fsharp#3933 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
editorconfig support Open

Area-VS-Editor Feature Request

dotnet/fsharp#3962 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Can we improve somewhat on FS0001 errors of the form "The type X does not match the type Y" Open

Area-Diagnostics Feature Improvement Theme-Simple-F#

dotnet/fsharp#3973 · 4 comments · 9 reactions · 1 assignee · Indexed Sep 15, 2026
Symbols API: full thread-safety Open

Area-LangService-API Bug Impact-Medium

dotnet/fsharp#3991 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Warning FS0044 (type abbreviation to a less accessible type) should not be incorrectly triggered when using signature files Open

Area-Compiler-Checking Area-Compiler-Checking-Accessibility Bug Impact-Low

dotnet/fsharp#3998 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Extended completion for static members suggests to open already opened namespace Open

AI-thinks-windows-only Area-LangService-AutoComplete Bug Impact-Medium

dotnet/fsharp#4079 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Navigation Bars off and Indentation set to Block by default Open

AI-thinks-windows-only Area-LangService-BlockStructure Bug Impact-Low

dotnet/fsharp#4087 · 25 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
No member completion in particular place in core MVC template Open

AI-thinks-windows-only Area-LangService-AutoComplete Bug Impact-Low

dotnet/fsharp#4104 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Bad error recovery for attributes Open

Area-Diagnostics Bug Impact-Medium

dotnet/fsharp#4130 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Symbols API: property CompiledName is compiled name of accessor Open

Area-LangService-API Bug Impact-Low

dotnet/fsharp#4135 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

dotnet/fsharp

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