Issues

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

  area-System.Securityuntriaged
  dotnet/runtime#135333 · Filter by author ilwren opened on Oct 7, 2026
  1

• Wrong answer on non-backtracking regex

  area-System.Text.RegularExpressionsuntriaged
  dotnet/runtime#135332 · Filter by author robertmorelli opened on Oct 7, 2026
  1

• Incorrect regex match range

  area-System.Text.RegularExpressionsuntriaged
  dotnet/runtime#135331 · Filter by author robertmorelli opened on Oct 7, 2026
  1

• 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
  1

• Regex empty string alternate does not match correctly

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

• Regex interpreter hangs

  area-System.Text.RegularExpressionsuntriaged
  dotnet/runtime#135328 · Filter by author robertmorelli opened on Oct 7, 2026
  1

• 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
  2

  

• [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

• Clean-up: Reduce repeated checks for ICollection<T>.Count, Iterator.GetCount and ICollection.Count

  area-System.Collectionsuntriaged
  dotnet/runtime#135269 · Filter by author MikeBarker-MSFT opened on Oct 6, 2026
  4

• [Perf] Windows/x64: 2 Regressions on 9/30/2026 6:33:29 PM +00:00

  arch-x64area-System.Text.Encodingos-windowsruntime-coreclrtenet-performancetenet-performance-benchmarksuntriaged
  dotnet/runtime#135316 · Filter by author performanceautofiler opened on Oct 6, 2026
  4

  

• [Perf] Windows/x64: 2 Regressions on 9/29/2026 4:30:57 PM +00:00

  arch-x64area-System.Text.RegularExpressionsos-windowsruntime-coreclrtenet-performancetenet-performance-benchmarksuntriaged
  dotnet/runtime#135284 · Filter by author performanceautofiler opened on Oct 6, 2026
  3

• [ci-scan] Test failure: System.Net.Http.Functional.Tests.SocketsHttpHandlerTest_HttpClientHandlerTest_Http3.LargeUriAndHeaders_Works

  arch-x86area-System.Net.Httpblocking-clean-ciKnown Build Erroros-windowsuntriaged
  dotnet/runtime#135268 · Filter by author lewing opened on Oct 6, 2026
  1

• ZstandardDictionary.Train returns a dictionary fixed to the default quality, so the encoder quality is silently ignored

  area-System.IO.Compression
  Bug

  dotnet/runtime#135265 · Filter by author neuecc opened on Oct 6, 2026 · 12.0.0
  3

• ZstandardDictionary.Train crashes the process (AccessViolation) for small sample sets instead of throwing

  area-System.IO.Compression
  Bug

  dotnet/runtime#135264 · Filter by author neuecc opened on Oct 6, 2026 · 12.0.0
  2

  

• System.Net.Quic.Tests.QuicStreamTests.WriteCanceled_NextWriteThrows fails with "No exception was thrown"

  area-System.Net.Quicblocking-clean-ciKnown Build Error
  dotnet/runtime#135255 · Filter by author jkotas opened on Oct 6, 2026 · Future
  2

• Func-eval ref struct result: ExternalMemoryHandle doesn't keep a collectible LoaderAllocator alive (access violation in GC after unload)

  area-Diagnostics-coreclruntriaged
  dotnet/runtime#135252 · Filter by author jkoritzinsky opened on Oct 5, 2026
  1

• Debugger external-memory func-eval results can expose stale cached fields after GC

  area-Diagnostics-coreclruntriaged
  Bug

  dotnet/runtime#135251 · Filter by author jkoritzinsky opened on Oct 5, 2026
  1

• Debugger func-eval can use stale non-leaf register values after GC

  area-Diagnostics-coreclrbuguntriaged
  dotnet/runtime#135249 · Filter by author jkoritzinsky opened on Oct 5, 2026
  1