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crossgen2 AccessViolation in ProfileDataManager.GetAllowSynthesis during win-x86 SDK crossgen layout

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

Status: Open.

#125699 In dotnet/runtime;

· steveisok opened on Mar 18, 2026

[browser][mono][MT] Prep for emscripten upgrade

arch-wasmWebAssembly architectureWebAssembly architecture

area-VM-threading-mono

os-browserBrowser variant of arch-wasmBrowser variant of arch-wasm

Status: Open (in progress).

dotnet/runtimenumber 129503

#129503 In dotnet/runtime;

· pavelsavara opened on Jun 17, 2026

[Async v2] Support Environment.StackTrace

area-System.Diagnostics

runtime-async

Status: Open (in progress).

dotnet/runtimenumber 125396

#125396 In dotnet/runtime;

· tommcdon opened on Mar 10, 2026

Reduce 99% of allocations when starting processes with derived env vars on Unix

area-System.Diagnostics.Process

os-linuxLinux OS (any supported distro)Linux OS (any supported distro)

tenet-performancePerformance related issuePerformance related issue

Status: Open.

#126162 In dotnet/runtime;

· adamsitnik opened on Mar 26, 2026

Android System.Security.Cryptography test failure: Signing key verifies the CRL

area-System.Security

disabled-testThe test is disabled in source code against the issueThe test is disabled in source code against the issue

os-android

Status: Open.

#119023 In dotnet/runtime;

· jkotas opened on Aug 22, 2025

Stack traces with async variants

area-NativeAOT-coreclr

disabled-testThe test is disabled in source code against the issueThe test is disabled in source code against the issue

runtime-async

Status: Open.

#122547 In dotnet/runtime;

· MichalStrehovsky opened on Dec 15, 2025

Move Microsoft.Extension.*.Abstractions to base (NetCore.App) shared framework.

area-Extensions-Primitives

breaking-changeIssue or PR that represents a breaking API or functional change over a previous release.Issue or PR that represents a breaking API or functional change over a previous release.

Status: Open.

#67487 In dotnet/runtime;

· AraHaan opened on Apr 2, 2022

Remove hardcoding of TFMs in wasm tests

arch-wasmWebAssembly architectureWebAssembly architecture

area-WorkloadsWorkloads like wasm-toolsWorkloads like wasm-tools

Status: Open.

#123155 In dotnet/runtime;

· ericstj opened on Jan 13, 2026

InvalidProgramException: Common Language Runtime detected an invalid program (Debug-only)

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

Status: Open.

#124425 In dotnet/runtime;

· Cheatoid opened on Feb 14, 2026

Significant decrease in performance of mini dump creation between targeting .NET Framework 4.6.1 and .NET 8

area-Diagnostics-coreclr

tenet-performancePerformance related issuePerformance related issue

Status: Open.

#122459 In dotnet/runtime;

· jake-pauls opened on Dec 11, 2025

[API Proposal]: New attribute for interop-specific struct concerns

api-approvedAPI was approved in API review, it can be implementedAPI was approved in API review, it can be implemented

area-System.Runtime.InteropServices

Status: Open.

#100896 In dotnet/runtime;

· jkoritzinsky opened on Apr 10, 2024

[RuntimeAsync] Runtime Async may not honor ExecutionContext.SuppressFlow().

area-VM-coreclr

runtime-async

Status: Open.

#122052 In dotnet/runtime;

· VSadov opened on Nov 29, 2025

Switch Default CI Focus to osx-arm64 for CoreCLR PRs

area-Infrastructure

Status: Open.

#108570 In dotnet/runtime;

· am11 opened on Oct 5, 2024

[Perf] Windows/x64: Regression in RCWLookup on 5/10/2025 5:16:10 PM +00:00

arch-x64

area-Interop-coreclr

os-windows

runtime-coreclrspecific to the CoreCLR runtimespecific to the CoreCLR runtime

tenet-performancePerformance related issuePerformance related issue

tenet-performance-benchmarksIssue from performance benchmarkIssue from performance benchmark

Status: Open.

#117775 In dotnet/runtime;

· performanceautofiler opened on May 13, 2025

Add support for converting structs into custom marshallers structs

area-System.Runtime.InteropServices

source-generatorIndicates an issue with a source generator featureIndicates an issue with a source generator feature

Status: Open.

#81656 In dotnet/runtime;

· Symbai opened on Feb 5, 2023

Remove SyntaxTree rooting from interop source generators

area-System.Runtime.InteropServices

source-generatorIndicates an issue with a source generator featureIndicates an issue with a source generator feature

tenet-performancePerformance related issuePerformance related issue

Status: Open.

#83870 In dotnet/runtime;

· jkoritzinsky opened on Mar 24, 2023

Intrinsically recognize Type.GetGenericTypeDefinition

area-Tools-ILLink.NET linker development as well as trimming analyzers.NET linker development as well as trimming analyzers

in-prThere is an active PR which will close this issue when it is mergedThere is an active PR which will close this issue when it is merged

Status: Open.

#94990 In dotnet/runtime;

· MichalStrehovsky opened on Nov 20, 2023

[RuntimeAsync] R2R support

area-VM-coreclr

runtime-async

Status: Open.

#115098 In dotnet/runtime;

· VSadov opened on Apr 27, 2025

Http Stress Status Report

area-System.Net.Http

Status: Open.

#42211 In dotnet/runtime;

· ManickaP opened on Sep 14, 2020

Test failure: System.Net.Quic.Tests.QuicStreamTests.TestStreams

arch-arm32

area-System.Net.Quic

blocking-clean-ci-optionalBlocking optional rolling runsBlocking optional rolling runs

JitStressCLR JIT issues involving JIT internal stress modesCLR JIT issues involving JIT internal stress modes

os-linuxLinux OS (any supported distro)Linux OS (any supported distro)

Status: Open.

#107969 In dotnet/runtime;

· v-wenyuxu opened on Sep 18, 2024

More refined categorization of tracing events?

area-System.Net.Http

enhancementProduct code improvement that does NOT require public API changes/additionsProduct code improvement that does NOT require public API changes/additions

Status: Open.

#113717 In dotnet/runtime;

· RudolfKurkaMs opened on Mar 19, 2025

Deadlock in WebSocketBase

area-System.Net.Http

bug

Status: Open.

#115559 In dotnet/runtime;

· fairful opened on May 14, 2025

[HttpStress] H3_REQUEST_REJECTED in Get / Get Slow

area-System.Net.Http

Status: Open.

#109121 In dotnet/runtime;

· antonfirsov opened on Oct 22, 2024

Add API to provide existing DI scope to HttpClientFactory

api-suggestionEarly API idea and discussion, it is NOT ready for implementationEarly API idea and discussion, it is NOT ready for implementation

area-Extensions-HttpClientFactory

Status: Open.

#47091 In dotnet/runtime;

· CarnaViire opened on Jan 17, 2021

(short)(double)32768.000000000007 produces invalid result

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

disabled-testThe test is disabled in source code against the issueThe test is disabled in source code against the issue

Status: Open.

#116823 In dotnet/runtime;

· mangod9 opened on Jun 19, 2025