Crst Level violation: Can't take level 17 lock CrstLoaderAllocatorReferences

[EgorBo]

Assert failure(PID 6052 [0x000017a4], Thread: 63069 [0xf65d]): Consistency check failed: Crst Level violation: Can't take level 17 lock CrstLoaderAllocatorReferences because you already holding level 14 lock CrstILStubGen

FAILED: false
    File: /Users/runner/work/1/s/src/coreclr/vm/crst.cpp:683
    Image: /private/tmp/helix/working/A6FA0928/p/dotnet

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1336431
Build error leg or test failing:

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "Consistency check failed: Crst Level violation: Can't take level 17 lock CrstLoaderAllocatorReferences because you already holding level 14 lock CrstILStubGen",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎
Result validation: ⚠️ Validation could not be done without an Azure DevOps build URL on the issue. Please add it to the "Build: 🔎" line.
Validation performed at: 3/16/2026 11:03:35 PM UTC

Known issue validation

Build: 🔎
Result validation: ⚠️ Validation could not be done without an Azure DevOps build URL on the issue. Please add it to the "Build: 🔎" line.
Validation performed at: 3/16/2026 11:04:23 PM UTC

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1336431
Error message validated: [Consistency check failed: Crst Level violation: Can't take level 17 lock CrstLoaderAllocatorReferences because you already holding level 14 lock CrstILStubGen]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 3/16/2026 11:05:48 PM UTC

Report

Build	Definition	Test	Pull Request
1339071	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125226
1339093	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125335
1339024	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#123252
1338972	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#124893
1339048	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#124770
1338969	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125590
1338910	dotnet/runtime	System.Net.NetworkInformation.Functional.Tests.WorkItemExecution	#125645
1338932	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125647
1338929	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125646
1338866	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#124375
1338844	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#124766
1338825	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125525
1338820	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125643
1338751	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125196
1338761	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125500
1338767	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125386
1338690	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#123252
1338706	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#124375
1338649	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125636
1338624	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125594
1338633	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125531
1338637	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125519
1338555	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125545
1338582	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125640
1338529	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125571
1338428	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125251
1338601	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#124716
1338423	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125592
1336431	dotnet/runtime	System.Net.Primitives.Pal.Tests.WorkItemExecution	#125574

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
28	29	29

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[jkotas]

@EgorBo This was introduced by your PR #125574 .

[jkotas]

Stacktrace of the assert:

DbgAssertDialog
CHECK::Trigger(char const*)
CrstBase::IsSafeToTake()
CrstBase::Enter(CrstBase::NoLevelCheckFlag)
LoaderAllocator::EnsureInstantiation(Module*, Instantiation)
ClassLoader::CreateTypeHandleForTypeDefThrowing(Module*, unsigned int, Instantiation, AllocMemTracker*)
ClassLoader::CreateTypeHandleForTypeKey(TypeKey const*, AllocMemTracker*)
ClassLoader::DoIncrementalLoad(TypeKey const*, TypeHandle, ClassLoadLevel)
ClassLoader::LoadTypeHandleForTypeKey_Body(TypeKey const*, TypeHandle, ClassLoadLevel)
ClassLoader::LoadTypeHandleForTypeKey(TypeKey const*, TypeHandle, ClassLoadLevel, InstantiationContext const*)
ClassLoader::LoadConstructedTypeThrowing(TypeKey const*, ClassLoader::LoadTypesFlag, ClassLoadLevel, InstantiationContext const*)
ClassLoader::LoadGenericInstantiationThrowing(Module*, unsigned int, Instantiation, ClassLoader::LoadTypesFlag, ClassLoadLevel, InstantiationContext const*, int)
SigPointer::GetTypeHandleThrowing(ModuleBase*, SigTypeContext const*, ClassLoader::LoadTypesFlag, ClassLoadLevel, int, Substitution const*, ZapSig::Context const*, MethodTable*, SigPointer::HandleRecursiveGenericsForFieldLayoutLoad*) const
MethodTableBuilder::InitializeFieldDescs(FieldDesc*, MethodTableBuilder::bmtInternalInfo*, MethodTableBuilder::bmtGenericsInfo const*, MethodTableBuilder::bmtMetaDataInfo*, MethodTableBuilder::bmtEnumFieldInfo*, MethodTableBuilder::bmtErrorInfo*, MethodTable***, MethodTableBuilder::bmtMethAndFieldDescs*, MethodTableBuilder::bmtFieldPlacement*, unsigned int*)
MethodTableBuilder::BuildMethodTableThrowing(LoaderAllocator*, Module*, Module*, unsigned int, BuildingInterfaceInfo_t*, MethodTableBuilder::bmtLayoutInfo const*, MethodTable*, MethodTableBuilder::bmtGenericsInfo const*, SigPointer, unsigned short)
ClassLoader::CreateTypeHandleForTypeDefThrowing(Module*, unsigned int, Instantiation, AllocMemTracker*)
ClassLoader::CreateTypeHandleForTypeKey(TypeKey const*, AllocMemTracker*)
ClassLoader::DoIncrementalLoad(TypeKey const*, TypeHandle, ClassLoadLevel)
ClassLoader::LoadTypeHandleForTypeKey_Body(TypeKey const*, TypeHandle, ClassLoadLevel)
ClassLoader::LoadTypeHandleForTypeKey(TypeKey const*, TypeHandle, ClassLoadLevel, InstantiationContext const*)
ClassLoader::LoadTypeDefThrowing(Module*, unsigned int, ClassLoader::NotFoundAction, ClassLoader::PermitUninstantiatedFlag, unsigned int, ClassLoadLevel, Instantiation*)
ClassLoader::LoadTypeDefOrRefThrowing(ModuleBase*, unsigned int, ClassLoader::NotFoundAction, ClassLoader::PermitUninstantiatedFlag, unsigned int, ClassLoadLevel)
SigPointer::GetTypeHandleThrowing(ModuleBase*, SigTypeContext const*, ClassLoader::LoadTypesFlag, ClassLoadLevel, int, Substitution const*, ZapSig::Context const*, MethodTable*, SigPointer::HandleRecursiveGenericsForFieldLayoutLoad*)
SigPointer::ConvertToInternalExactlyOne(Module*, SigTypeContext const*, SigBuilder*, int)
unmanaged_name": "SigPointer::ConvertToInternalSignature(Module*, SigTypeContext const*, SigBuilder*, int)
SigPointer::ConvertToInternalSignature(Module*, SigTypeContext const*, SigBuilder*, int)
ILStubCache::CreateNewMethodDesc(LoaderHeap*, MethodTable*, unsigned int, Module*, unsigned char const*, unsigned int, int, SigTypeContext*, AllocMemTracker*)
ILStubCache::GetStubMethodDesc(MethodDesc*, ILStubHashBlob*, unsigned int, Module*, Module*, unsigned char const*, unsigned int, SigTypeContext*, AllocMemTracker*, bool&, MethodDesc*)
(anonymous namespace)::ILStubCreatorHelper::GetStubMethodDesc()
(anonymous namespace)::CreateInteropILStub(ILStubState*, StubSigDesc*, CorNativeLinkType, CorNativeLinkFlags, CorInfoCallConvExtension, int, unsigned int*, int, bool*)
PInvoke::CreateCLRToNativeILStub(StubSigDesc*, CorNativeLinkType, CorNativeLinkFlags, CorInfoCallConvExtension, unsigned int)
PInvoke::GetStubForILStub(PInvokeMethodDesc*, MethodDesc**, unsigned int)
GetStubForInteropMethod(MethodDesc*, unsigned int)
MethodDesc::DoPrestub(MethodTable*, CallerGCMode)
PreStubWorker
ThePreStub
System.Net.NetworkInformation.BsdNetworkInterface.GetBsdNetworkInterfaces()
System.Net.NetworkInformation.NetworkInterfacePal.get_LoopbackInterfaceIndex()
System.Net.NetworkInformation.NetworkInterfacePal.get_IPv6LoopbackInterfaceIndex()