Version Used: VS2019 Preview 2

Steps to Reproduce:

1. Create a new .NET core C# library project
2. Change the C# language version to 8.0
3. Type the following code

#nullable enable
struct Foo<T>
{
	static Foo<T> Bar;
}

Expected Behavior: Code compiles fine whether or not #nullable enable is used
Actual Behavior: With #nullable enable the compiler emits this error:

Error CS0523: Struct member 'Foo<T>.Bar' of type 'Foo<T>' causes a cycle in the struct layout