Playground crushes when running the following code in Xcode7.

gistfile1.swift

import UIKit

func doit(value:Int) throws -> String {
    if value > 0 {
        return String(value)
    }
    else {
        throw NSError(domain: "test.sonson.com", code: 0, userInfo: [:])
    }
}

do {
    let sample = try doit(0)
} catch {
    print("a")
}

print("a")