xcode6-beta5 crashes when creating a dictionary

Question

I'm a little puzzled as to why switching from xcode6-beta4 to xcode6-beta5 would bring breaking changes to my app! However, here is what I am looking at,

This code belongs to a view controller. I'm not sure what other information could be helpful. I am just trying things at this point...

and in the console read fatal error: array element cannot be bridged to Objective-C, which leads me to think I can't have an NSDictionary in an Array?

I rewrote it like

var suggestions:Array<Dictionary<String, String> > = [["str1": "s1", "str2": "s2"]]

but I don't know why i can't have an NSDictionary in a swift Array.