Precompiled queries code produces nullable annotation warning on build

[donpanl]

Bug description

Precompiled query code can have nullable annotations:

public static TSource? Query1_FirstOrDefault1<TSource>(this global::System.Linq.IQueryable<TSource> source)

Building it leads to a warning:

/workspaces/ef-play/nullwarn/Generated/Program.EFInterceptors.Context.cs(32,30): warning CS8669: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

It seems the only way to ignore this warning is to disable it for the whole project.

See attached project with minimal example.

Can be reproduced with:

dotnet ef dbcontext optimize --output-dir Generated --precompile-queries --nativeaot --verbose
> dotnet build

nullwarn.zip

Your code

--- Model.cs

public class Blog
{
    public int Id { get; set; }
}

--- Context.cs

using Microsoft.EntityFrameworkCore;

public class Context : DbContext
{
    public DbSet<Blog> Blogs { get; set; } = null!;

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        base.OnConfiguring(optionsBuilder);
        optionsBuilder.UseSqlite("Data Source=tmp.db");
    }
}

--- Program.cs

using var context = new Context();
_ = context.Blogs.FirstOrDefault();

Stack traces

Verbose output

EF Core version

10.0.3, 11.0.0-preview.2.26159.112

Database provider

Microsoft.EntityFrameworkCore.Sqlite

Target framework

.NET 10, .NET 11

Operating system

Ubuntu 24.04.4 LTS

IDE

No response

[roji]

Thanks for raising this. I'm putting on the backlog as we're looking at better ways to support NativeAOT, but at some point we'll do a push and I'll take a look at fixing this.