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Issues: dotnet/fsharp
Celebrating the F# 9 Release: A Tribute to Our Contributors
#17996
opened Nov 13, 2024 by
vzarytovskii
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Issues list
Type checking is cancelled on parsing errors in the compiler compilations
Area-Diagnostics
mistakes and possible improvements to diagnostics
Area-LangService-Diagnostics
FCS code analysis, diagnostics, red squigglies
Feature Improvement
Change compiler suggestion when not using return value of a function that returns a mistakes and possible improvements to diagnostics
Feature Request
Task
Area-Diagnostics
Support for UnmanagedCallersOnlyAttribute Class.
Area-Compiler-ImportAndInterop
import of .NET DLLs and interop
Feature Request
Needs-design
Needs-RFC
Colorize text in FSharpDiagnostics
Area-Diagnostics
mistakes and possible improvements to diagnostics
Feature Request
FSI multi-emit unstable
Area-FSI
Bug
Impact-Medium
(Internal MS Team use only) Describes an issue with moderate impact on existing code.
Fsharp non-deterministically fails to download vswhere
Engineering
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
ActivePatterns: Compilation issues (memory and speed)
Area-Compiler-Optimization
The F# optimizer, release code gen etc.
Feature Improvement
fsi bug after .NET 9 update: non-HTTPS sources in nuget.config creates error even with allowInsecureConnections="true" config
Area-FSI
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
Regression
Strange behavior in runtime
Area-Compiler-SRTP
bugs in SRTP inference, resolution, witness passing, code gen
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
Nested modules defined in the wrong parent module when preceded by a string interpolution (multi line) surrounded with parentheses
Area-Compiler-Syntax
lexfilter, indentation and parsing
Bug
Impact-Medium
(Internal MS Team use only) Describes an issue with moderate impact on existing code.
FS0193: internal error: startIndex cannot be larger than length of string. (Parameter 'startIndex')
Area-Compiler-Syntax
lexfilter, indentation and parsing
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
Visual Studio constantly hangs for multitarget project - stacks point to F# code.
Area-VS
VS support for F# not covered elsewhere
Bug
Impact-High
(Internal MS Team use only) Describes an issue with extreme impact on existing code.
Nullness issue - Regression in member constraint overload resolution with Issues related to handling of Nullable Reference Types
Bug
Impact-Medium
(Internal MS Team use only) Describes an issue with moderate impact on existing code.
null
-constrained methods from pre-F# 9-compiled code
Area-Nullness
Namespace open is incorrectly reported as redundant
Area-LangService-CodeFixes
Code fixes associated with diagnostics
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
RuntimeWrappedException cannot be caught
Area-Compiler-CodeGen
IlxGen, ilwrite and things at the backend
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
Field in a record named the same as a DUs case inside of module of the same name of the record type fails to pattern match
Area-Compiler-Checking
Type checking, attributes and all aspects of logic checking
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
Nullness issue - Can't cleanly implement INotifyPropertyChanged by publishing an Event
Area-Nullness
Issues related to handling of Nullable Reference Types
Bug
#18361
opened Mar 5, 2025 by
marklam
1 of 7 tasks
#r "nuget: .." in VisualFSI produces an interesting warning
Area-VS-FSI
VS window and commands for F# Interactive
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
Nullness issue – Publishing an event produces nullness warning
Area-Nullness
Issues related to handling of Nullable Reference Types
Bug
Impact-Low
(Internal MS Team use only) Describes an issue with limited impact on existing code.
Backwards compatibility broken
Area-Compiler-SRTP
bugs in SRTP inference, resolution, witness passing, code gen
Bug
Impact-High
(Internal MS Team use only) Describes an issue with extreme impact on existing code.
Nullness issue – Invalid type constraint resolution on Issues related to handling of Nullable Reference Types
Bug
Impact-Medium
(Internal MS Team use only) Describes an issue with moderate impact on existing code.
ILookup
Area-Nullness
#18334
opened Feb 22, 2025 by
xperiandri
CI should check the dev container setup
Area-Tooling
Generic tooling bugs and suggestions, which do not fall into any existing category.
Continuous Improvement
help wanted
Using a non-null constant expression bound to a literal variable of a less-specific type generates invalid IL
Area-Compiler-CodeGen
IlxGen, ilwrite and things at the backend
Bug
Impact-Medium
(Internal MS Team use only) Describes an issue with moderate impact on existing code.
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Updated in the last three days: updated:>2025-04-09.