Open Radar

 
Summary:
While making an array of dictionaries in the playground Xcode crashes.  If there is a syntax error, it is not highlighted. There is just a  crash.

Steps to Reproduce:
1.  Start making an array of dictionaries in a playground:

let streams = [
    ["integer" : 0, "integer2" : 0, "string" : "", "integer3" : 35992, "title" : "test2", "array" : [
        ["id" : 4872, "url" : "http://example.com", "url2" : "http://test.com", "title" : "Title"],
        ["id" : 4873, "url" : "http://example.com", "url2" : "http://test.com", "title" : "Title"],
        ["id" : 4874, "url" : "http://example.com", "url2" : "http://test.com", "title" : "Title"],
        
        ]
    ]
    
]

2. Add a comma after the second to last brace to insert another dictionary.
3. Copy the first dictionary and paste on the next line below the comma
4. Crash

 

Expected Results:
Not a crash, if there is a syntax error, point it out

Actual Results:
Crashes xcode

Version:
Version 6.0 (6A254o) 
Beta 3

Notes:
This same thing happens in a project of mine but instead of crashing, Xcode grinds to a halt and the SourceKitService process memory grows to over 1 GB

Configuration:
Happens in a new playground

Attachments: