Directly passing a method result to another method by ref, fails with InvalidProgramException

[bfarmer67]

The following throws an InvalidProgramException

public static class Numbers
{
    public static int GetInt() => 40;
    public static int AddTwo(ref int value) => value + 2;
}

public class Program
{
    public static void Main()
    {
        var getIntMethod = typeof(Numbers).GetMethod(nameof(Numbers.GetInt));
        var addTwoMethod = typeof(Numbers).GetMethod(nameof(Numbers.AddTwo));
		
        var getIntCall = Expression.Call(getIntMethod);

        var expr = Expression.Call(addTwoMethod, getIntCall);
        
        var lambda = Expression.Lambda<Func<int>>(expr).CompileFast();
        var result = lambda();  
    }
}

Expression.Compile is fine with it, but FEC doesn't like it.

The issue is easy to work around by storing the result of the first method in a
variable and passing the variable to the second method, but I wanted to pass the
error along.

Here is a small dotnetfiddle https://dotnetfiddle.net/PWeV9P that demonstrates the issue.

Thank you for a really nice library.

[dadhi]

Thanks for the repro. I will look.