When I compile this example with .NET framework, I don't get any warnings, but with .NET Core 3 Preview, I get "warning SA1101: Prefix local calls with this" on the line return Quux<int>().

I checked this occurs with any of:

• StyleCopAnalyzers version 1.02, 1.1.118, or 1.2.0-beta.66
• .NET Core 3.0.100-preview7-012821, 3.0.100-rc1-014004, or 3.0.100-rc1-014181.

    public class TestClass
    {
        private int foobar = 1;

        public int Foo()
        {
            int Quux<T>() => this.foobar;
            return Quux<int>();
        }
    }