Segmentation Fault: 11 – Xcode 6.3

Can’t archive

My app runs fine (Xcode 6.3.2, swift based) on Simulator and on multiple devices. But when I try to archive it I get the error Command failed due to signal: Segmentation fault: 11.

  • Could not cast value of type 'UIView' (0x112484eb0) to 'SKView' (0x111646718)
  • Update iOS SDK version to 8.4
  • Others face same problem

    Segmentation Fault 11 when running Swift app

    "Command failed due to signal: Segmentation fault: 11" – What is the issue?

    Command failed due to signal: Segmentation fault: 11

    Root cause?

    But it seems that each have different reasons for getting the error.. I am unable to comprehend the error message I am getting. Posted below, any hints or tips would be greatly appreciated!

    Error log

    0  swift                    0x0000000108e5d2b8 llvm::sys::PrintStackTrace(__sFILE*) + 40
    1  swift                    0x0000000108e5d794 SignalHandler(int) + 452
    2  libsystem_platform.dylib 0x00007fff8897bf1a _sigtramp + 26
    3  libsystem_platform.dylib 0x00007fff574b7b28 _sigtramp + 3467885608
    4  swift                    0x0000000108a053f2 swift::serialization::Serializer::writeCrossReference(swift::Decl const*) + 578
    5  swift                    0x0000000108a0e275 swift::serialization::Serializer::writeAllDeclsAndTypes() + 2181
    6  swift                    0x0000000108a0f2f8 swift::serialization::Serializer::writeAST(llvm::PointerUnion<swift::Module*, swift::SourceFile*>) + 2600
    7  swift                    0x0000000108a11960 swift::serialization::Serializer::writeToStream(llvm::raw_ostream&, llvm::PointerUnion<swift::Module*, swift::SourceFile*>, swift::SILModule const*, swift::SerializationOptions const&) + 144
    8  swift                    0x0000000108a12521 swift::serialize(llvm::PointerUnion<swift::Module*, swift::SourceFile*>, swift::SerializationOptions const&, swift::SILModule const*) + 321
    9  swift                    0x0000000108746c1a frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 5514
    10 swift                    0x00000001087454e6 main + 1814
    11 libdyld.dylib            0x00007fff8db235c9 start + 1
    12 libdyld.dylib            0x0000000000000080 start + 1917700792

    2 Solutions Collect From Internet About “Segmentation Fault: 11 – Xcode 6.3”

    Solved it. Problem was two things:
    1) Converting to Double
    2) Handling an empty array

    Converting to Double

    Changed from var lat: Double? = d["lat"].doubleValue to var lat: Double? = Double(d["lat"].doubleValue)

    Handling an empty array

    Changed from

    let brands = d["brands_unfiltered"].arrayValue {
    if brands == [] {
        // Do nothing (empty)
        // Do stuff


    if let brands = d["brands_unfiltered"].arrayValue as Array! {
         // Do stuff

    To find the root cause I deactivated larges part of the code until I found what got the archiving not to function. Thereafter the solution was pretty straight forward. Hope this helps someone else struggling with the same error.

    I found the code that cause my “Archive” action to fail with this error “Command failed due to signal: Segmentation fault: 11”

    When I use the indexPath in the cellForRowAtIndexPath function, I need to put an exclamation mark (i.e indexPath! instead of indexPath). However, I still puzzled by why there is such error if I omit the exclamation mark. Does anyone know the reason?

        override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!, object: PFObject!) -> PFTableViewCell! {
                // code to get cell, etc
                let thumbnailImage = self.userPhotos?.getFromCacheOrDownload(username,
                    circle:, delegate: self, indexPath: indexPath!)
                cell.userPhotoImageView.image = thumbnailImage
                return cell