ExecutionEngineException on using step into while debugging

[aromaa]

Description

When trying to step into a virtual call the runtime unexpectedly throws ExecutionEngineException. Setting the <TieredCompilation>false</TieredCompilation> flag to the project file seems to fix this.

Reproduction Steps

Setting a breakpoint on the following code on L9 and executing step into the 6th time would trigger ExecutionEngineException when attempting to step into the IDbContextDependencies.StateManager on DbContext.

using Microsoft.EntityFrameworkCore;

using TestContext context = new();

TestEntity entity = new();

_ = context.Entities.Entry(entity);

context.Entities.Update(entity); //Start executing step into in this line.

internal sealed record TestEntity(int Id = 0);

internal sealed class TestContext : DbContext
{
    public DbSet<TestEntity> Entities => this.Set<TestEntity>();

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) =>
        optionsBuilder.UseInMemoryDatabase("test");
}

Expected behavior

No exception

Actual behavior

The runtime crashes with ExecutionEngineException

Regression?

No response

Known Workarounds

No response

Configuration

.NET 8 Windows 10 22H2 build 19045.3693 x64 Microsoft Visual Studio Community 2022 Version 17.9.0 Preview 1.0

Other information

No response

[ghost]

Tagging subscribers to this area: @tommcdon See info in area-owners.md if you want to be subscribed.

Issue Details

---

### Description When trying to step into a virtual call the runtime unexpectedly throws ExecutionEngineException. Setting the `false` flag to the project file seems to fix this. ### Reproduction Steps Setting a breakpoint on the following code on L9 and executing step into the 6th time would trigger ExecutionEngineException when attempting to step into the `IDbContextDependencies.StateManager` on `DbContext`. ```csharp using Microsoft.EntityFrameworkCore; using TestContext context = new(); TestEntity entity = new(); _ = context.Entities.Entry(entity); context.Entities.Update(entity); internal sealed record TestEntity(int Id = 0); internal sealed class TestContext : DbContext { public DbSet Entities => this.Set(); protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) => optionsBuilder.UseInMemoryDatabase("test"); } ``` ### Expected behavior No exception ### Actual behavior The runtime crashes with ExecutionEngineException ### Regression? _No response_ ### Known Workarounds _No response_ ### Configuration .NET 8 Windows 10 22H2 build 19045.3693 x64 ### Other information _No response_

Author:	aromaa
Assignees:	-
Labels:	`area-Diagnostics-coreclr`, `untriaged`
Milestone:	-

[MichalPetryka]

Does <TieredPGO>false</TieredPGO> help too?

[aromaa]

Does <TieredPGO>false</TieredPGO> help too?

It does not.

[tommcdon]

Hi @aromaa! I am not able to reproduce the issue. Would you mind sharing a dump of the target process at the point of the ExecutionEngineException? This can be achieved by getting the app into the reproducible state with the debugger in break state displaying the ExceptionEngineException, and then choosing Debug->Save Dump As.

[aromaa]

Dump

I was unable to take one from VS directly so I used the task manager instead.

[tommcdon]

HI @aromaa I apologize for the delay and have requested access to the dump to investigate.

[aromaa]

You should be able to access it now.

[mikelle-rogers]

@aromaa, just clarifying that by line 9 you mean this line? protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) => optionsBuilder.UseInMemoryDatabase("test");

[aromaa]

No, I mean literally the L9. The one with the context.Entities.Update(entity);. I have also clarified it in the repro.