IndexOutOfRangeException from RenameToUpperCaseCodeFixProvider.RegisterCodeFixesAsync

[jnyrup]

In this snippet put the cursor on _ and press ctrl + ,

public class Class1
{
    void _() { }
}

System.IndexOutOfRangeException : Index was outside the bounds of the array.
   at async StyleCop.Analyzers.NamingRules.RenameToUpperCaseCodeFixProvider.RegisterCodeFixesAsync(<Unknown Parameters>)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.CodeAnalysis.CodeFixes.CodeFixService.GetCodeFixesAsync(<Unknown Parameters>)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformFunctionAsync[T](<Unknown Parameters>)

version: 1.2.0-beta.435