XCode 6.1: Weird behaviour in Swift code highlighting

Question

I just started to take a look into Swift but XCode is messing up the code highlighting. As shown in the picture below

Due some bad performance issues with Swift, I am using XCode Version 6.1 (Beta) , but had the same problem with XCode 6.0 . This usually appears at the end of classes?

I tried clean projects, reload project, reopen files, rebooting system but it doesn't disappear, it just changes the colors randomly....

Anyone had a similar issue?

Answer 1

Xcode 6.1 GM 2（几天前发布）中已修复此问题。