@BillWagner Is this issue still valid? I'm looking at the very last section of that page, here:
https://learn.microsoft.com/en-us/dotnet/csharp/nullable-references#arrays
and I see it describes the possibility of an exception thrown by [] operator.
If I get this wrong, then if you could elaborate a bit and assign me that would be great!

Hi @BartoszKlonowski

Yes, it's still valid. The paragraph at the end describes the "hole" in analysis for arrays of a reference type:

string[] someNotes = new string[10];
Console.WriteLine(string[5].Length); // Array elements are null

What's missing is that a type with an indexer throws a NullReference Exception on [] just like on .:

public class C
{
    public void M() {}
    public this[int i]
    { 
        get { /* ... */ }
        set { /* ... */}
    }
}

// elsewhere:

C c = default;
c.M(); // Null Reference Exception
c[4] = 24; // Null Reference Exception. Needs to be descxribed.
int j = c[4]; // Null Reference Exception

Does that make sense?

@BillWagner Yes, totally, thank you!
I will launch a PR with this addition.