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import Foundation

let a: @convention(block) () -> Int =  { 42 }
print(type(of: a)) // @conversion(block) () -> Int
print((a as AnyObject) === (a as AnyObject)) // true
let b: Any = a
print(type(of: b)) // @conversion(block) () -> Int
print((b as AnyObject) === (b as AnyObject)) // false