[swift-users] NSMutableData's init?(length length: Int) initializer

[soyer via swift-users]

Hello Guys, Girls,

Do you know why is the init?(length length: Int) NSMutableData's initializer 
failable?
The memory allocation can fail, but I think Swift doesn't handle that cases. 
(it is not a real issue in a modern OS)
The code on github calls a non failable initializer.
https://github.com/apple/swift-corelibs-foundation/blob/master/Foundation/NSData.swift#L904

public convenience init?(length: Int) {
        let memory = malloc(length)
        self.init(bytes: memory, length: length, copy: false) { buffer, amount 
in
                free(buffer)
        }
}

Thanks
s
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