Assertion failed 'lastBlockILEndOffset < beginOffs'

[filipnavara]

Building Loader\classloader\StaticVirtualMethods\GenericContext\GenericContextTest in NativeAOT win-x86 Debug mode yields:

ILC: D:\runtime\src\coreclr\jit\scopeinfo.cpp:1566
ILC: D:\runtime\src\coreclr\jit\scopeinfo.cpp:1566
ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_NonGenericNonGenericValuetype_GenericOverString_GenericOverString_GenericMethodOverString[System.__Canon]()' during 'Generate code' (IL size 47; hash 0xab6c92eb; MinOpts)

ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverReferenceType_ClassAGenericValuetype_GenericOverInt32_GenericOverObject_NormalMethod[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x89d04558; MinOpts)

ILC: D:\runtime\src\coreclr\jit\scopeinfo.cpp:1566
ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverReferenceType_ClassAGenericClass_GenericOverString_GenericOverString_NormalMethod[System.__Canon]()' during 'Generate code' (IL size 47; hash 0xa314cc02; MinOpts)

Native stack trace:

[0x0]   KERNELBASE!wil::details::DebugBreak+0x2   0x3ba503b388   0x7ffd9f8eb9e9   
[0x1]   clrjit_win_aot_x86_x64!assertAbort+0x249   0x3ba503b390   0x7ffd9fb6c5c4   
[0x2]   clrjit_win_aot_x86_x64!CodeGen::siOpenScopesForNonTrackedVars+0xa4   0x3ba503d4c0   0x7ffd9fb6be2b   
[0x3]   clrjit_win_aot_x86_x64!CodeGen::siBeginBlock+0x15b   0x3ba503d510   0x7ffd9f8a2358   
[0x4]   clrjit_win_aot_x86_x64!CodeGen::genCodeForBBlist+0xaf8   0x3ba503d550   0x7ffd9f8969c3   
[0x5]   clrjit_win_aot_x86_x64!CodeGen::genGenerateMachineCode+0x683   0x3ba503da00   0x7ffd9f88a6cc   
[0x6]   clrjit_win_aot_x86_x64!CodeGenPhase::DoPhase+0x2c   0x3ba503da60   0x7ffd9fb3b157   
[0x7]   clrjit_win_aot_x86_x64!Phase::Run+0x87   0x3ba503daa0   0x7ffd9f88a688   
[0x8]   clrjit_win_aot_x86_x64!DoPhase+0x58   0x3ba503db20   0x7ffd9f89627b   

JIT dump for TestEntrypoint:Test_Ldftn_GenericOverTypeParameterGenericValuetype_GenericOverString_CuriouslyRecurringGeneric_GenericMethodOverTypeParameter:
GenericContextTest.txt

[JulieLeeMSFT]

@TIHan PTAL.

[TIHan]

Will do

[TIHan]

For Loader\classloader\StaticVirtualMethods\GenericContext\GenericContextTest, assertion also occurs in x64 debug:

 Number of test projects in group 1: 0
  Number of test projects in group 2: 0
  Building managed test group 2: "c:\work\runtime\\dotnet.cmd" msbuild c:\work\runtime\src\tests\build.proj /t:Build "/p:TargetArchitecture=x64" "/p:Configuration=Debug" "/p:LibrariesConfiguration=Release" "/p:TasksConfiguration=Debug" "/p:TargetOS=windows" "/p:ToolsOS
  =" "/p:PackageOS=" "/p:RuntimeFlavor=coreclr" "/p:RuntimeVariant=" "/p:CLRTestBuildAllTargets=" "/p:UseCodeFlowEnforcement=" "/p:__TestGroupToBuild=2" "/p:__SkipRestorePackages=1" /nodeReuse:false /maxcpucount /bl:c:\work\runtime\artifacts\/log/Debug/InnerManagedTest
  Build.2.binlog "/p:DefaultBuildAllTarget=BuildNativeAot"
  C:\work\runtime\.dotnet
  MSBuild version 17.10.0-preview-24101-01+07fd5d51f for .NET

    Number of test projects in group 2: 0
  Number of test projects in group 3: 2
  Building managed test group 3: "c:\work\runtime\\dotnet.cmd" msbuild c:\work\runtime\src\tests\build.proj /t:Build "/p:TargetArchitecture=x64" "/p:Configuration=Debug" "/p:LibrariesConfiguration=Release" "/p:TasksConfiguration=Debug" "/p:TargetOS=windows" "/p:ToolsOS
  =" "/p:PackageOS=" "/p:RuntimeFlavor=coreclr" "/p:RuntimeVariant=" "/p:CLRTestBuildAllTargets=" "/p:UseCodeFlowEnforcement=" "/p:__TestGroupToBuild=3" "/p:__SkipRestorePackages=1" /nodeReuse:false /maxcpucount /bl:c:\work\runtime\artifacts\/log/Debug/InnerManagedTest
  Build.3.binlog "/p:DefaultBuildAllTarget=BuildNativeAot"
  C:\work\runtime\.dotnet
  MSBuild version 17.10.0-preview-24101-01+07fd5d51f for .NET

    Number of test projects in group 3: 2
    ILLink.RoslynAnalyzer -> c:\work\runtime\artifacts\bin\ILLink.RoslynAnalyzer\Debug\netstandard2.0\ILLink.RoslynAnalyzer.dll
    ILLink.CodeFixProvider -> c:\work\runtime\artifacts\bin\ILLink.CodeFixProvider\Debug\netstandard2.0\ILLink.CodeFixProvider.dll
    Mono.Linker -> c:\work\runtime\artifacts\bin\Mono.Linker\ref\Debug\net9.0\illink.dll
    Mono.Linker -> c:\work\runtime\artifacts\bin\Mono.Linker\Debug\net9.0\illink.dll
    ILLink.Tasks -> c:\work\runtime\artifacts\bin\ILLink.Tasks\Debug\net9.0\ILLink.Tasks.dll
    GenericContextCommonAndImplementation -> c:\work\runtime\artifacts\tests\coreclr\windows.x64.Debug\Loader\classloader\StaticVirtualMethods\GenericContext\GenericContextTest\GenericContextCommonAndImplementation\GenericContextCommonAndImplementation.dll
    GenericContextCommonCs -> c:\work\runtime\artifacts\tests\coreclr\windows.x64.Debug\Loader\classloader\StaticVirtualMethods\GenericContext\GenericContextCommonCs\GenericContextCommonCs.dll
    GenericContextTest -> c:\work\runtime\artifacts\tests\coreclr\windows.x64.Debug\Loader\classloader\StaticVirtualMethods\GenericContext\GenericContextTest\GenericContextTest\GenericContextTest.dll
    Generating native code
    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverStructGenericValuetype_GenericOverString_GenericOverString_GenericMethodOverString[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x23ad0f52; MinOpts)

    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_NonGenericNonGenericValuetype_GenericOverInt32_CuriouslyRecurringGeneric_GenericMethodOverString[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x49a2e267; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverReferenceType_ClassAGenericValuetype_GenericOverConstrainedType_NonGeneric_NormalMethod[System.__Canon,System.__Canon]()' during 'Generate code' (IL size 47; hash 0x71
  0bd4fc; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverGenericStructOverTypeParameterGenericValuetype_GenericOverInt32_GenericOverObject_NormalMethod[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x00be97a2;
  MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverStructGenericClass_GenericOverInt32_GenericOverObject_GenericMethodOverTypeParameter[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x9e4e8b0c; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverStructGenericClass_GenericOverConstrainedType_CuriouslyRecurringGeneric_GenericMethodOverInt[System.__Canon,System.__Canon]()' during 'Generate code' (IL size 47; hash
   0x9a477855; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_NonGenericNonGenericClass_GenericOverInt32_NonGeneric_GenericMethodOverTypeParameter[System.__Canon]()' during 'Generate code' (IL size 47; hash 0xd3a24e21; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverReferenceType_ClassAGenericClass_GenericOverString_GenericOverString_GenericMethodOverInt[System.__Canon]()' during 'Generate code' (IL size 47; hash 0xf4ad2bdd; MinOp
  ts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverTypeParameterGenericClass_GenericOverInt32_GenericOverString_GenericMethodOverTypeParameter[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x5d1c83aa; Min
  Opts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverStructGenericValuetype_GenericOverConstrainedType_NonGeneric_GenericMethodOverInt[System.__Canon,System.__Canon]()' during 'Generate code' (IL size 47; hash 0xff512ad7
  ; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_NonGenericNonGenericClass_GenericOverConstrainedType_GenericOverString_GenericMethodOverInt[System.__Canon,System.__Canon]()' during 'Generate code' (IL size 62; hash 0xa570c667;
   MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverGenericStructOverTypeParameterGenericClass_GenericOverString_CuriouslyRecurringGeneric_GenericMethodOverTypeParameter[System.__Canon]()' during 'Generate code' (IL siz
  e 47; hash 0x2002870e; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverReferenceType_ClassAGenericValuetype_GenericOverConstrainedType_GenericOverObject_GenericMethodOverTypeParameter[System.__Canon,System.__Canon]()' during 'Generate cod
  e' (IL size 62; hash 0xd6c990b5; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverTypeParameterGenericValuetype_GenericOverString_NonGeneric_GenericMethodOverString[System.__Canon]()' during 'Generate code' (IL size 47; hash 0xd4f2af40; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_NonGenericNonGenericValuetype_GenericOverString_GenericOverObject_GenericMethodOverInt[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x4893fb2d; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverTypeParameterGenericValuetype_GenericOverString_CuriouslyRecurringGeneric_GenericMethodOverInt[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x51a8bed9;
  MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverReferenceType_ClassAGenericValuetype_GenericOverInt32_GenericOverObject_GenericMethodOverInt[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x9547e707; Mi
  nOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverGenericStructOverTypeParameterGenericValuetype_GenericOverString_NonGeneric_GenericMethodOverTypeParameter[System.__Canon]()' during 'Generate code' (IL size 47; hash
  0xd82f01cc; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_NonGenericNonGenericValuetype_GenericOverConstrainedType_CuriouslyRecurringGeneric_GenericMethodOverTypeParameter[System.__Canon,System.__Canon]()' during 'Generate code' (IL siz
  e 47; hash 0x927f6c73; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_NonGenericNonGenericClass_GenericOverConstrainedType_CuriouslyRecurringGeneric_GenericMethodOverTypeParameter[System.__Canon,System.__Canon]()' during 'Generate code' (IL size 47
  ; hash 0xd30ca96e; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverGenericStructOverTypeParameterGenericValuetype_GenericOverString_CuriouslyRecurringGeneric_GenericMethodOverTypeParameter[System.__Canon]()' during 'Generate code' (IL
   size 47; hash 0xd2d11753; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverTypeParameterGenericValuetype_GenericOverString_CuriouslyRecurringGeneric_GenericMethodOverString[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x03b569b
  f; MinOpts)

    ILC: C:\work\runtime\src\coreclr\jit\scopeinfo.cpp:1566
    ILC: Assertion failed 'lastBlockILEndOffset < beginOffs' in 'TestEntrypoint:Test_Ldftn_GenericOverTypeParameterGenericValuetype_GenericOverString_CuriouslyRecurringGeneric_GenericMethodOverTypeParameter[System.__Canon]()' during 'Generate code' (IL size 47; hash 0x
  1f1113fb; MinOpts)

[TIHan]

@filipnavara , your JIT dump link is giving a 404 - I guess GitHub got messed up?

[TIHan]

This assertion occurs even in a December 2023 commit - so it's likely been this way for a while.

[TIHan]

Dump from one of the x64 assertions:
dump.txt

Edit: Ok, so GitHub is showing 404 for 'dump.txt' even when uploading new files.

[filipnavara]

I suspected it's not x86 specific. Thanks for looking into it.