Setup does not recognize all virtual sealed methods as uninterceptable

[stakx]

Moq (4.7.142) does not recognize all sealed methods as uninterceptable. Given a sealed overridden property in a derived class, it does not throw an exception when an attempt is made to Setup that property:

public abstract class FooBase
{
    public abstract object Property { get; }
}

public class Foo : FooBase
{
    public sealed override object Property => null;
}

[Fact] // does not pass
public void Cannot_setup_virtual_sealed_property()
{
    // verify that Property is both virtual and sealed:
    var propertyGetter = typeof(Foo).GetProperty("Property").GetGetMethod();
    Assert.True(propertyGetter.IsVirtual && propertyGetter.IsFinal);

    // arrange:
    var fooMock = new Mock<Foo>();

    // act:
    var exception = Record.Exception(() =>
    {
        fooMock.Setup(foo => foo.Property).Returns("mocked");
    });
    var property = fooMock.Object.Property;

    // assert:
    Assert.NotEqual("mocked", property); // Moq shouldn't be able to intercept a sealed property
    Assert.NotNull(exception);           // and warn us by throwing an exception.
}