Issues

• TensorPrimitives.MinNumber(ReadOnlySpan<T>) incorrectly propagates NaN

  area-System.Numericshelp wanted
  dotnet/runtime#133346 · Filter by author Sebtous opened on Sep 7, 2026 · Future
  2

• ILVerify does not detect disallowed boxing of byref-like types

  area-Tools-ILVerificationhelp wanted
  dotnet/runtime#132954 · Filter by author masonwheeler opened on Aug 30, 2026 · Future
  9

• [API Proposal]: Read an environment variable without expansion

  api-suggestionarea-System.Runtimehelp wanted
  dotnet/runtime#132366 · Filter by author AkitoTheGambler opened on Aug 16, 2026 · Future
  6

• Audit: files too large for agents, tooling, and GitHub UI

  area-Metahelp wanted
  dotnet/runtime#131440 · Filter by author tannergooding opened on Jul 27, 2026 · 12.0.0
  1

• MemoryExtensions: multi-value IndexOfAny/IndexOfAnyExcept/LastIndexOfAny/LastIndexOfAnyExcept missing int/long fast paths

  area-System.Runtimehelp wanted
  dotnet/runtime#131367 · Filter by author Rob-Hague opened on Jul 25, 2026 · Future
  8

• [Analyzer Proposal]: Warn on FixedAddressValueType/ThreadStatic on instance fields.

  api-suggestionarea-System.Runtime.CompilerServicescode-analyzerhelp wanted
  dotnet/runtime#131094 · Filter by author MichalPetryka opened on Jul 20, 2026 · Future
  7

• JIT should hoist interface method resolution out of loops

  area-CodeGen-coreclrhelp wantedtenet-performance
  dotnet/runtime#130572 · Filter by author MichalPetryka opened on Jul 12, 2026 · Future
  3

• [API Proposal]: ResetLowestSetBit on IBinaryInteger

  api-suggestionarea-System.Numericshelp wanted
  dotnet/runtime#129719 · Filter by author MihaZupan opened on Jun 22, 2026 · Future
  5

• JIT generates redundant mov for inline ++i (pre-increment)

  area-CodeGen-coreclrhelp wanted
  dotnet/runtime#129532 · Filter by author rameel opened on Jun 17, 2026 · Future
  6

• Optimize checks against close integer values.

  area-CodeGen-coreclrhelp wantedtenet-performance
  dotnet/runtime#129400 · Filter by author MichalPetryka opened on Jun 15, 2026 · Future
  3

• JIT: Investigate fallthrough flow regression from empty block removal

  area-CodeGen-coreclrhelp wanted
  dotnet/runtime#129275 · Filter by author BoyBaykiller opened on Jun 11, 2026 · Future
  3

  

• ToFrozenDictionary overloads differ in duplicate handling

  area-System.Collectionshelp wanted
  dotnet/runtime#127798 · Filter by author Timovzl opened on May 5, 2026 · Future
  4

• System.DirectoryServices.Protocols.SearchRequest Filter does not allow unnecessary space-escapes unlike on Windows

  area-System.DirectoryServiceshelp wanted
  dotnet/runtime#127175 · Filter by author Pxtl opened on Apr 20, 2026 · Future
  2

• System.DirectoryServices.Protocols.SearchRequest Filter does not allow redundant parentheses unlike on Windows

  area-System.DirectoryServiceshelp wanted
  dotnet/runtime#127168 · Filter by author Pxtl opened on Apr 20, 2026 · Future
  4

• Test failure: System.Linq.Tests.SequenceTests.Numbers_ProduceExpectedSequence

  area-System.Linqblocking-clean-ci-optionalhelp wantedJitStress
  dotnet/runtime#127125 · Filter by author VincentBu opened on Apr 20, 2026 · 11.0.0
  3

  

• ImmutableArray<T> cannot be passed to methods accepting ReadOnlySpan<T>

  api-suggestionarea-System.Collectionshelp wanted
  dotnet/runtime#126758 · Filter by author rreminy opened on Apr 10, 2026 · Future
  11

• Struct DIM escape analysis driven deabstraction

  area-CodeGen-coreclrhelp wantedPriority:3tenet-performance
  dotnet/runtime#126501 · Filter by author NinoFloris opened on Apr 3, 2026 · Future
  8

• System.Drawing.Image Width and Height declare bool default values

  area-System.Drawinghelp wanted
  dotnet/runtime#126265 · Filter by author sduquette-devolutions opened on Mar 28, 2026 · Future
  4

• Investigate load factor and size tuning strategy of Frozen collections

  area-System.Collectionshelp wantedtenet-performance
  dotnet/runtime#126205 · Filter by author danmoseley opened on Mar 27, 2026 · Future
  2

• [API Proposal]: ChannelOptions.ProcessingOrder

  api-suggestionarea-System.Threading.Channelshelp wanted
  dotnet/runtime#125923 · Filter by author TonyValenti opened on Mar 22, 2026 · Future
  3

• JIT: Arm IsContainableImmed doesnt handle shifts

  area-CodeGen-coreclrhelp wantedoptimization
  dotnet/runtime#125578 · Filter by author BoyBaykiller opened on Mar 15, 2026 · Future
  2

• JIT: Simplify arithmetic operations on memory, as is already done for register

  area-CodeGen-coreclrhelp wantedoptimization
  dotnet/runtime#125300 · Filter by author BoyBaykiller opened on Mar 8, 2026 · Future
  1

• JIT: A case of needing JitOptRepeat=3 for constant folding and conditional move

  area-CodeGen-coreclrhelp wantedoptimization
  dotnet/runtime#124700 · Filter by author BoyBaykiller opened on Feb 21, 2026 · Future
  7

• Specialfolder.MyDocuments returns localized name for folder instead of actual folder name on windows.

  area-System.Runtimehelp wanted
  dotnet/runtime#123844 · Filter by author zaphod77 opened on Jan 31, 2026 · Future
  5

• SystemEvents.PowerModeChanged is not raised on suspend/resume on Surface Pro

  area-Microsoft.Win32bughelp wanted
  dotnet/runtime#123773 · Filter by author molesmoke opened on Jan 29, 2026 · Future
  3