Issues

• [OptionsValidator] CompareAttribute.OtherProperty is interpreted as C# member-access syntax without symbol resolution

  area-Extensions-Optionsuntriaged
  dotnet/runtime#135365 · Filter by author ViveliDuCh opened on Oct 7, 2026
  1

• [ci-scan] Test failure: SmtpClientTlsTest.SslOptions_DefaultTargetHostFollowsHostChange

  area-System.Netblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135352 · Filter by author rzikm opened on Oct 7, 2026
  1

• [ci-scan] Test failure: SmtpClientTlsTest.SslOptions_AssignmentDuringSendThrows

  area-System.Netblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135353 · Filter by author rzikm opened on Oct 7, 2026
  1

• [ci-scan] Test failure: SmtpClientTlsTest.ClientCertificateRequired_Sent with SslOptions

  area-System.Netblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135354 · Filter by author rzikm opened on Oct 7, 2026
  1

• JIT: Tier1 with Dynamic PGO drops isinst in inlined guarded devirtualization (Roslyn MetadataWriter NRE, .NET 10.0.12 x64)

  area-CodeGen-coreclruntriaged
  dotnet/runtime#135350 · Filter by author rbuergi opened on Oct 7, 2026
  2

  

• [ci-scan] Test failure: System.Runtime.Tests TypeLoadException for StructWithMutualGenericFieldA

  area-Infrastructure-librariesblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135348 · Filter by author rzikm opened on Oct 7, 2026
  2

• [wasm] [r2r] String.Ctor(ReadOnlySpan<char>) is being interpreted when it really should be compiled via R2R

  arch-wasmarea-ReadyToRununtriaged
  dotnet/runtime#135347 · Filter by author davidwrighton opened on Oct 7, 2026
  3

• [wasm] [r2r] Generics helper methods aren't rooted as part of helper rooting

  arch-wasmarea-ReadyToRununtriaged
  dotnet/runtime#135346 · Filter by author davidwrighton opened on Oct 7, 2026
  2

• [wasm] [r2r] Consider adding support for universal shared generics where the code is universally shared generic

  arch-wasmarea-CodeGen-coreclruntriaged
  dotnet/runtime#135345 · Filter by author davidwrighton opened on Oct 7, 2026
  2

• AsyncEnumerable.ThenBy with async key selector throws NullReferenceException: secondary keys not awaited

  area-System.Linquntriaged
  dotnet/runtime#135343 · Filter by author agjini opened on Oct 7, 2026
  2

  

• [Android] AesGcm.Encrypt/Decrypt with an empty payload crashes with SIGABRT in AndroidCryptoNative_CipherUpdate

  area-System.Securityos-android
  Bug

  dotnet/runtime#135333 · Filter by author ilwren opened on Oct 7, 2026 · 12.0.0
  4

  

• Wrong answer on non-backtracking regex

  area-System.Text.RegularExpressionsuntriaged
  dotnet/runtime#135332 · Filter by author robertmorelli opened on Oct 7, 2026
  2

• Incorrect regex match range

  area-System.Text.RegularExpressionsuntriaged
  dotnet/runtime#135331 · Filter by author robertmorelli opened on Oct 7, 2026
  2

• Regex interpreter and compiler disagree on pattern with empty alternate

  area-System.Text.RegularExpressionsuntriaged
  dotnet/runtime#135330 · Filter by author robertmorelli opened on Oct 7, 2026
  2

• Regex empty string alternate does not match correctly

  area-System.Text.RegularExpressionsbug
  dotnet/runtime#135329 · Filter by author robertmorelli opened on Oct 7, 2026 · 12.0.0
  1

• Regex interpreter hangs

  area-System.Text.RegularExpressionsuntriaged
  dotnet/runtime#135328 · Filter by author robertmorelli opened on Oct 7, 2026
  2

• Managed ilasm: remaining PDB differences from native ilasm after #135289, #135297, #135311 and #135312

  area-ILTools-coreclruntriaged
  dotnet/runtime#135314 · Filter by author pcshrosbree opened on Oct 6, 2026
  4

  

• [wasm/R2R] JitTest_Directed fails with GC hole assert

  arch-wasmarea-ReadyToRunblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135313 · Filter by author jkotas opened on Oct 6, 2026
  6

• NativeAOT: missed devirtualization for closed generic interfaces over reference types

  area-NativeAOT-coreclrtenet-performance
  dotnet/runtime#135310 · Filter by author EgorBo opened on Oct 6, 2026 · Future
  3

• [API Proposal]: Add SpecialFolder.Downloads enum value

  api-suggestionarea-System.Runtimeuntriaged
  dotnet/runtime#135304 · Filter by author ladeak opened on Oct 6, 2026
  3

• GetMethod with genericParameterCount throws NotSupportedException on types from CustomReflectionContext

  area-System.Reflectionuntriaged
  dotnet/runtime#135299 · Filter by author caraioniurie47 opened on Oct 6, 2026
  1

• [mono] DefaultBinder throws NotImplementedException for non-runtime MethodBase subclasses

  area-System.Reflectionruntime-monountriaged
  dotnet/runtime#135298 · Filter by author caraioniurie47 opened on Oct 6, 2026

• System.Diagnostics.Process.Tests hangs with parallel test collections on macOS

  area-System.Diagnostics.Process
  dotnet/runtime#135294 · Filter by author steveisok opened on Oct 6, 2026 · 12.0.0
  1

  

• [wasm][JIT] regallocwasm asserts 'physReg->OperIs(GT_PHYSREG)' for fast tail call whose SP arg is spilled to a temp

  area-CodeGen-coreclruntriaged
  dotnet/runtime#135292 · Filter by author lewing opened on Oct 6, 2026
  1

• Microsoft.Extensions.FileProviders.PhysicalFileProviderTests.TokensFiredForNewDirectoryContentsOnRename test fails

  area-Extensions-FileSystemblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135283 · Filter by author EgorBo opened on Oct 6, 2026
  2