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norio_nomura 9/1/2017 2:00 AM
import Foundation var data = Data(bytes: [0x50, 0x4B, 0x01, 0x02, 0x41, 0x61]) data.removeFirst() print(data.startIndex) // swift-3.1: "0\n", swift-4.0: "1\n" data.customMirror // crash on swift-4.0 https://bugs.swift.org/browse/SR-5811 (edited)