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CopyToAsync_AllDataCopied fails on macOS 15: MemberData not found on inherited class

area-System.Net.Sockets

Known Build ErrorUse this to report build issues in the .NET Helix tabUse this to report build issues in the .NET Helix tab

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#127226 In dotnet/runtime;

· rzikm opened on Apr 21, 2026

Use $JOURNAL_STREAM and fstat for systemd logger

area-Extensions-Hosting

Status: Open.

Feature

#127218 In dotnet/runtime;

· cincuranet opened on Apr 21, 2026

·  

Future

Debugger: "Object is in a zombie state" (CORDBG_E_OBJECT_NEUTERED) when stepping over a method returning a generic type on win-arm64

arch-arm64

area-Diagnostics-coreclr

os-windows

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#127217 In dotnet/runtime;

· steveisok opened on Apr 21, 2026

[aw] No-Op Runs

agentic-workflows

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#127214 In dotnet/runtime;

· github-actions opened on Apr 21, 2026

wasm_m2n_invoke.g.cpp:22:5: error: unknown type name 'NOINLINE'

arch-wasmWebAssembly architectureWebAssembly architecture

area-Build-mono

blocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'Blocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

Known Build ErrorUse this to report build issues in the .NET Helix tabUse this to report build issues in the .NET Helix tab

Status: Open.

#127212 In dotnet/runtime;

· MichalStrehovsky opened on Apr 21, 2026

·  

11.0.0

ConcurrentDictionary<TKey,TValue> causes disproportionately high full GC pause times for large counts

area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMICLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

tenet-performancePerformance related issuePerformance related issue

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#127211 In dotnet/runtime;

· theolivenbaum opened on Apr 21, 2026

Test failure: global::GenericsTest.TestVector128C()

area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMICLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

blocking-outerloopBlocking the 'runtime-coreclr outerloop' and 'runtime-libraries-coreclr outerloop' runsBlocking the 'runtime-coreclr outerloop' and 'runtime-libraries-coreclr outerloop' runs

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#127209 In dotnet/runtime;

· VincentBu opened on Apr 21, 2026

Align System.Reflection.Metadata CustomAttributeDecoder tests with resource-embedded assembly scheme

area-System.Reflection.Metadata

Status: Open.

#127208 In dotnet/runtime;

· kotlarmilos opened on Apr 21, 2026

·  

Future

LambdaExpression.Compile() is >10x slower on .NET 10 for an EntityGraphQL-generated projection tree; Compile(preferInterpretation: true) is unaffected

area-System.Linq.Expressions

tenet-performancePerformance related issuePerformance related issue

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#127203 In dotnet/runtime;

· lukemurray opened on Apr 21, 2026

Remaining failures on runtime-libraries-interpreter

area-CodeGen-Interpreter-coreclr

Status: Open.

#127201 In dotnet/runtime;

· BrzVlad opened on Apr 21, 2026

·  

11.0.0

[Runtime async] Generic virtual method test failing on CoreCLR

area-VM-coreclr

runtime-async

Status: Open.

#127197 In dotnet/runtime;

· eduardo-vp opened on Apr 21, 2026

TypeMap entries not kept for library projects activated via export

area-NativeAOT-coreclr

partner-impactThis issue impacts a partner who needs to be kept updatedThis issue impacts a partner who needs to be kept updated

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#127187 In dotnet/runtime;

· manodasanW opened on Apr 20, 2026