LINQ operators disregard nullabilities

[nxtn]

Version Used: Visual Studio 2019 Version 16.6.1

Steps to Reproduce:

#nullable enable

using System.Collections.Generic;
using System.Linq;

class MyClass
{
    static void Method()
    {
        _ = from MyClass item1 in Enumerate()
            select item1;

        foreach (MyClass item2 in Enumerate())
        //               ~~~~~ Warning	CS8600	Converting null literal or possible null value to non-nullable type.
        {
        }
    }

    static IEnumerable<MyClass?> Enumerate()
    {
        throw new NotImplementedException();
    }
}

Expected Behavior:

CS8600 is reported for both item1 and item2.

Actual Behavior:

CS8600 is only reported for item2.

[jcouv]

Thanks for reporting this. It's a known issue/gap at the moment. We're still trying to figure out how to address it.
Closing as duplicate of #29863 (Implement nullability analysis in LINQ queries)