Xcode swift failed with exit code 254

Question

I am getting this compiler error in my code and I can\'t figure out why:

:0: error: unable to execute command: Segmentation fault: 11


        

Answer 1

In my case, i was calling an objective-c function from swift through bridge. Signature was like -

    - (SomeReturnType *)getSomething:(SomeOptions *)options
                          success:(void (^)(NSArray *response))success
                          failure:(void (^)(NSError *error))failure;

From swift, i was calling it as follows and getting compile error as "Xcode swift failed with exit code 254" -

    ObjCClass().getSomething(nil, success: {(response : Array!) in


        }, failure: {(error: NSError!)  in

        })

changing it to following worked for me -

     ObjCClass().getSomething(nil, success: {(response : [AnyObject]!) in


        }, failure: {(error: NSError!)  in

        })