preble

import Cocoa

@objc
class SomeTextStorage: NSTextStorage {
    
    private var storage: NSMutableAttributedString
    
    override init() {
        storage = NSMutableAttributedString(string: "", attributes: nil)
        super.init()

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protocol Mutatable {}

extension Mutatable {
    func mutated(f: (inout Self) -> Void) -> Self {
        var copy = self
        f(&copy)
        return copy
    }
}

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protocol Protocol {
    func methodInProtocol() -> String
}

extension Protocol {
    func methodInProtocol() -> String {
        return "Protocol"
    }
    func methodOnExtension() -> String {

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Was getting the following errors when calling AVAssetImageGenerator generateCGImagesAsynchronously. The stream in question was an HLS stream. When I switched to using the AVURLAsset of an MP4, the error disappeared.

With Apple-supplied HLS stream:

Error Domain=AVFoundationErrorDomain Code=-11819 "Cannot Complete Action" UserInfo={NSLocalizedRecoverySuggestion=Try again later., NSLocalizedDescription=Cannot Complete Action, NSUnderlyingError=0x1c0057850 {Error Domain=NSOSStatusErrorDomain Code=-12178 "(null)"}}

With another HLS stream generated by a video hosting provider:

Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (-12436), NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x1c4a57e20 {Error Domain=NSOSStatusErrorDomain Code=-12436 "(null)"}}

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# Full path: /home/pi/.config/lxsession/LXDE-pi/autostart
@lxpanel --profile LXDE-pi
@pcmanfm --desktop --profile LXDE-pi
@xset s off
@xset -dpms
@xset s noblank
@/home/pi/jmri-runner.sh

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public extension Optional {

    /// Stop in the debugger in debug builds if self is `.none`.
    ///
    /// Example usage:
    ///
    ///   guard let value = maybeValue.assertUnwrap() else { return "bogus value" }
    ///
    func assertUnwrap(_ message: @autoclosure () -> String? = nil, file: StaticString = #file, function: String = #function, line: UInt = #line) -> Wrapped? {
        switch self {