Why is this enum declaration working now?

Question

While answering another question, Jon Skeet mentioned that there is a weird thing going on with the definition of enums. His answer.

He states that redi

Answer 1

This was an intentional language change in C# 6, whose specs have only been published in draft form. It was such a small change that we keep forgetting to put it into the specs.

See also https://github.com/dotnet/roslyn/issues/623