Issues

• [ci-scan] Hang: Microsoft.Extensions.Configuration.Functional.Tests times out on MacCatalyst after 4500 seconds

  agentic-workflowsblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#137152 · Filter by author github-actions opened on Nov 8, 2026

• [ci-scan] Test failure: ECKeyFileTests explicit NIST P-256 imports unexpectedly succeed on Azure Linux 4

  agentic-workflowsblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#137151 · Filter by author github-actions opened on Nov 8, 2026

• [ci-scan] Build break: Apple x64 NativeAOT apps cannot link CryptoKit SHA3 symbols

  agentic-workflowsblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#137150 · Filter by author github-actions opened on Nov 8, 2026

• Wasm debugging from VS Code ends at once when WasmEnableThreads is on, even with no threads started

  area-Debugger-monountriaged
  dotnet/runtime#137142 · Filter by author markjleece opened on Nov 7, 2026
  1

• [ci-scan] Test failure: CompatibleWithTest_TypeLoadException on Apple mobile CoreCLR

  agentic-workflowsblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#137140 · Filter by author github-actions opened on Nov 7, 2026

• ILLink Roslyn analyzer: analysis time is quadratic in the number of lambdas in one method

  area-Tools-ILLinktenet-performanceuntriaged
  dotnet/runtime#137139 · Filter by author vbreuss opened on Nov 7, 2026
  1

• System.ComponentModel.Composition: CompositionLock.LockStateForRead/LockStateForWrite enter the lock before boxing its holder, so an OutOfMemoryException leaves the lock held

  area-System.Threadinguntriaged
  dotnet/runtime#137138 · Filter by author marko-configo opened on Nov 7, 2026
  1

• Incorrect loop bound in SizeOptIListSelectIterator.ToList

  area-System.Collectionsuntriaged
  dotnet/runtime#137126 · Filter by author equmagg opened on Nov 7, 2026
  1

• [wasm][mono][AOT] Record struct Equals in shared generic code asserts in mini_method_get_rgctx or traps with "function signature mismatch"

  area-Codegen-AOT-monountriaged
  dotnet/runtime#137123 · Filter by author vrimar opened on Nov 7, 2026

• [ci-scan] Test failure: System.Security.Cryptography.EcDiffieHellman.Tests.ECDiffieHellmanTests_OpenSsl.TestExplicitCurveImportO

  agentic-workflowsarea-System.Securityblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#137121 · Filter by author github-actions opened on Nov 7, 2026
  1

  

• [mono][AOT] gsharedvt method calling INumberBase<T>.TryParse fails in aot-only mode

  area-Codegen-AOT-monountriaged
  dotnet/runtime#137120 · Filter by author danielchalmers opened on Nov 7, 2026
  1

• [ci-scan] Hang: dotnet-dump opening macOS x64 Mach-O dumps

  area-Diagnostics-cdacblocking-clean-cidisabled-testKnown Build Error
  dotnet/runtime#137115 · Filter by author max-charlamb opened on Nov 6, 2026
  3

• CborWriter: reduce per-call overhead of map and array bookkeeping

  area-System.Formats.Cbortenet-performanceuntriaged
  dotnet/runtime#137111 · Filter by author sichanyoo opened on Nov 6, 2026
  2

• [wasm][R2R] Interface calls go through CORINFO_HELP_VIRTUAL_FUNC_PTR instead of a dispatch cell

  arch-wasmarea-ReadyToRuntenet-performanceuntriaged
  dotnet/runtime#137107 · Filter by author lewing opened on Nov 6, 2026
  2

• X509Chain.Build throws "MapOpenSsl30Code reported unhandled error code" on OpenSSL 3.0.0-3.0.5 when the trust anchor is rejected as an issuer

  area-System.Securityuntriaged
  dotnet/runtime#137098 · Filter by author caraioniurie47 opened on Nov 6, 2026
  1

• [Analyzer Proposal]: Check for correct event ID passed to EventSource.WriteEvent based on the System.Diagnostics.Tracing.EventAttribute

  api-suggestionarea-System.Diagnostics.Tracingcode-analyzeruntriaged
  dotnet/runtime#137091 · Filter by author jkoritzinsky opened on Nov 6, 2026
  1

• [NAOT] Fail fast enumerating an array through a size compatible IEnumerable<T>

  area-System.Numericsuntriaged
  dotnet/runtime#137084 · Filter by author equmagg opened on Nov 6, 2026
  2

• AsyncProfilerTests fail with "Collection was empty"

  area-Diagnostics-coreclrblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#137083 · Filter by author jkotas opened on Nov 6, 2026
  2

• WebAssembly AOT skips an intermediate base-class static constructor

  area-Codegen-AOT-monountriaged
  dotnet/runtime#137067 · Filter by author appel1 opened on Nov 6, 2026
  1

• Native AOT: a static profile (MibcFile) makes ILC miscompile a foreach over IEnumerable<int> passed an int[]

  area-CodeGen-coreclrbug
  dotnet/runtime#137063 · Filter by author mwadams opened on Nov 6, 2026
  5

  

• [WASM] Interlocked.Increment/Decrement use CAS helper loops in single-threaded code

  arch-wasmarea-CodeGen-coreclr
  dotnet/runtime#137061 · Filter by author MichalStrehovsky opened on Nov 6, 2026 · 12.0.0
  2

  

• ReadyToRun: Unsafe cross-version-bubble compile-time folding in comparer and RuntimeHelpers intrinsics

  area-crossgen2-coreclruntriaged
  dotnet/runtime#137054 · Filter by author davidwrighton opened on Nov 6, 2026

• OleDbDataReader.GetBytes/GetChars throw ArgumentOutOfRangeException for a zero-length read at the end of the buffer

  area-System.Buffersuntriaged
  dotnet/runtime#137051 · Filter by author alaricd opened on Nov 5, 2026

• DbTransaction.SupportsSavepoints docs say Release/ReleaseAsync are expected to throw, but they are no-ops by design

  area-System.Transactionsuntriaged
  dotnet/runtime#137040 · Filter by author alaricd opened on Nov 5, 2026
  1

• System.Data.OleDb: OleDbParameterCollection.RemoveAt throws IndexOutOfRangeException, IList.RemoveAt documents ArgumentOutOfRangeException

  area-System.Data.OleDBuntriaged
  dotnet/runtime#137039 · Filter by author alaricd opened on Nov 5, 2026
  2