The below program demonstrates a possible bug that I encountered. Can anyone else reproduce my results (as explained in the comments)? If so, is it a Swift or Cocoa bug (I haven't tried it in Objective C)?
import AppKit extension NSFont { var planesWithMembers: [UInt8] { return (UInt8(0) ... UInt8(255)).filter { // The follwing line will crash (EXC_BAD_ACCESS) for some fonts: coveredCharacterSet.hasMember(inPlane: $0) // I have tested it with Xcode 8.3.3 and Xcode 9 beta 1, both // Swift 3 and 4, and they all reproduce the crash. // macOS 10.12.5 } } } // Examples that will not cause the crash: // let fontName = "AlBayan" // let fontName = "AppleBraille" // let fontName = "Chalkboard" // let fontName = "Helvetica" // let fontName = "Zapfino" // Examples that will cause the crash: // let fontName = "AppleColorEmoji" // let fontName = "AppleSymbols" let fontName = "Baskerville" // let fontName = "Geneva" // let fontName = "SnellRoundhand" let font = NSFont(name: fontName, size: 12)! let result = font.planesWithMembers print("Planes that contains members:", result)
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