No nullability warning for a Linq expression

[savahmel]

Visual Studio 2019 Preview 1.1

The following code produces no warning and results in null reference exception.

#nullable enable
using System;
class Program
{ 
    static void Main(string[] args)
    {
        string? s = null;
        System.Linq.Expressions.Expression<Func<bool>> ex = () => 0 == s.Length;
        ex.Compile()();
    }
}

Expecting to get a warning on the dereferencing of s.Length

[jaredpar]

Thanks for taking the time to file this! Looks like a duplicate of #29863