Dependency injection does not respect unmanaged constraint

[quixoticaxis]

Description

DI does not respect unmanaged constraint and enables instantiation of invalid types.

Reproduction Steps

Run the code.

using Microsoft.Extensions.DependencyInjection;

using var provider = new ServiceCollection()
    .AddSingleton(typeof(IGeneralInterface<>), typeof(UnmanagedConstrainedImplementation<>))
    .BuildServiceProvider();

var invalid = provider.GetRequiredService<IGeneralInterface<Managed>>();
invalid.Call(new());

public interface IGeneralInterface<T>
{
    void Call(T value);
}

public class UnmanagedConstrainedImplementation<T>
    : IGeneralInterface<T>
where T : unmanaged
{
    public void Call(T value)
    {
    }
}

public record struct Managed(object One, object Other);

Expected behavior

Exception is thrown.

Actual behavior

The program successfully completes.

Regression?

No, as far as I know.

Known Workarounds

Wrap instantiation in a factory, get modreq modifications by reflection and check by hand.

Configuration

Not specific to configuration.

Other information

IMHO, it is up to debate whether System.RuntimeType.MakeGenericType should respect the constraint, and I tend to believe it should, but the DI is meant to be used by C# end-users and definitely should not instantiate types which are invalid for the language.

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