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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
#18454 opened Apr 7, 2025 by auduchinok Backlog
Colorize text in FSharpDiagnostics Area-Diagnostics mistakes and possible improvements to diagnostics Feature Request
#18442 opened Apr 3, 2025 by auduchinok Backlog
FSI multi-emit unstable Area-FSI Bug Impact-Medium (Internal MS Team use only) Describes an issue with moderate impact on existing code.
#18441 opened Apr 3, 2025 by majocha Backlog
Fsharp non-deterministically fails to download vswhere Engineering Impact-Low (Internal MS Team use only) Describes an issue with limited impact on existing code.
#18432 opened Apr 1, 2025 by ViktorHofer Backlog
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.
#18417 opened Mar 27, 2025 by ingted Backlog
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.
#18416 opened Mar 26, 2025 by MangelMaxime Backlog
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.
#18402 opened Mar 24, 2025 by IS4Code Backlog
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.
#18392 opened Mar 17, 2025 by vsfeedback Backlog
Nullness issue - Regression in member constraint overload resolution with null-constrained methods from pre-F# 9-compiled code Area-Nullness 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.
#18390 opened Mar 16, 2025 by IS4Code
3 of 7 tasks
Backlog
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.
#18389 opened Mar 16, 2025 by Lanayx Backlog
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.
#18374 opened Mar 11, 2025 by IS4Code Backlog
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.
#18364 opened Mar 6, 2025 by MangelMaxime Backlog
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.
#18357 opened Mar 4, 2025 by KevinRansom March 2025
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.
#18349 opened Mar 1, 2025 by xperiandri
1 of 7 tasks
Backlog
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.
#18344 opened Feb 27, 2025 by gusty April 2025
Nullness issue – Invalid type constraint resolution on ILookup Area-Nullness 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.
#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
#18321 opened Feb 17, 2025 by Martin521 Backlog
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.
#18319 opened Feb 14, 2025 by IS4Code Backlog
ProTip! Updated in the last three days: updated:>2025-04-09.