Operator implicit/explicit produces InvalidProgram

[Xemrox]

Hi there,

another small report with testcase. Throws a System.InvalidProgramException : Common Language Runtime detected an invalid program.

public struct SampleType
{
    public bool? Value { get; init; }

    public SampleType(bool? value) { Value = value; }

    public static implicit operator bool?(SampleType left) => (left.Value is not null && left.Value is bool b) ? b : null;
    public static explicit operator bool(SampleType left) => left.Value is not null && left.Value is bool b && b;
}

[Fact]
public void Operator_Implicit_Fast()
{
    var attributeType = typeof(SampleType);
    var ctorMethodInfo = attributeType.GetConstructors()[0];

    var newExpression = Expression.New(ctorMethodInfo, [Expression.Constant(null, typeof(bool?))]);

    var conversion1 = Expression.Convert(newExpression, typeof(bool));
    var conversion2 = Expression.Convert(newExpression, typeof(bool?));

    var lambda1 = Expression.Lambda<Func<bool>>(conversion1);
    var lambda2 = Expression.Lambda<Func<bool?>>(conversion2);
    var sample1 = lambda1.Compile()(); // <- OK
    var sample2 = lambda2.Compile()(); // <- OK
    var sample_fast1 = lambda1.CompileFast()(); // <- OK
    var sample_fast2 = lambda2.CompileFast()(); // <- throws exception
}

[Xemrox]

It makes no difference if its implicit operator or explicit operator

[dadhi]

@Xemrox Hi, thanks for the reporting. I will check.