Error -Segmentation错误: 11 in Xcode 10

Question

我在Xcode9中工作。代码工作正常，但是当我在Xcode10中使用相同的代码时，我得到了编译时错误。

这是错误：

1.  While emitting SIL for 'fetchConsumerRecommendations(completionHandler:failureHandler:)' at /Users/shahezad/Desktop/Newcode/foodkonnectconsumer-ios/Food/FirebaseManager.swift:2578:5
2.  While silgen emitFunction SIL function "@$S4Food15FirebaseManagerC28fetchConsumerRecommendations17completionHandler07failureH0yySaySSGc_ys5Error_pSgctFZ".
 for 'fetchConsumerRecommendations(completionHandler:failureHandler:)' at /Users/shahezad/Desktop/Newcode/foodkonnectconsumer-ios/Food/FirebaseManager.swift:2578:5
3.  While silgen closureexpr SIL function "@$S4Food15FirebaseManagerC28fetchConsumerRecommendations17completionHandler07failureH0yySaySSGc_ys5Error_pSgctFZySo19FIRDocumentSnapshotCSg_AItcfU_".
 for expression at [/Users/shahezad/Desktop/Newcode/foodkonnectconsumer-ios/Food/FirebaseManager.swift:2584:285 - line:2615:9] RangeText="{ (documentSnapshot, error) in


            if error == nil {

                if (documentSnapshot?.exists)!{

                    print("Consumer Recommendations - \(describing: documentSnapshot?.data())")

                    let dictOnboarding:NSDictionary = (documentSnapshot?.data())! as NSDictionary

                    print("\(dictOnboarding.allKeys)")

                    completionHandler(dictOnboarding.allKeys as! [String])

                }
                else{


                    completionHandler([])

                }

            }
            else{

                failureHandler(error)

            }


        }"
error: Segmentation fault: 11

我不能弄清楚这是什么代码的问题。

Answer 1

也许将来有人会在解析的json排序中犯我的错误，如下所示：

let countryList = try? JSONDecoder().decode([Country].self, from: data)
   if let countryList = countryList {
         completion(countryList.sorted(by: <))
   }