Reputation: 5535
Command failed due to signal: Segmentation fault: 11
I'm getting the error ...
Command failed due to signal: Segmentation fault: 11
... when trying to compile my Swift app. I'm using Xcode 6.1, trying to build for an iPhone 5 on iOS 8.1.
My Code
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var username: UITextField!
@IBAction func signIn(sender: AnyObject) {
PFUser.logInWithUsernameInBackground(username.text, password:"mypass") {
(user: PFUser!, error: NSError!) -> Void in
if user != nil {
println("Logged In")
} else {
func myMethod() {
var user = PFUser()
user.username = username.text
user.password = " "
user.signUpInBackgroundWithBlock {
(succeeded: Bool!, error: NSError!) -> Void in
if error == nil {
// Hooray! Let them use the app now.
} else {
println("Signed Up")
}
}
}
println(error)
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
Parse.setApplicationId("key here")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
And the error text!
CompileSwift normal arm64 /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/ViewController.swift
cd /Users/Alec/Desktop/Re-Chat/Re-Chat
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -c -primary-file /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/ViewController.swift /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/AppDelegate.swift -target arm64-apple-ios8.0 -Xllvm -aarch64-use-tbi -target-cpu cyclone -target-abi darwinpcs -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.1.sdk -I /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Products/Debug-iphoneos -F /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Products/Debug-iphoneos -F /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat -g -import-objc-header /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/Re-Chat-Bridging-Header.h -module-cache-path /Users/Alec/Library/Developer/Xcode/DerivedData/ModuleCache -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-generated-files.hmap -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-own-target-headers.hmap -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-all-target-headers.hmap -Xcc -iquote -Xcc /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-project-headers.hmap -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Products/Debug-iphoneos/include -Xcc -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/DerivedSources/arm64 -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/DerivedSources -Xcc -DDEBUG=1 -emit-module-doc-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController~partial.swiftdoc -Onone -module-name Re_Chat -emit-module-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController~partial.swiftmodule -serialize-diagnostics-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController.dia -emit-dependencies-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController.d -o /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController.o
0 swift 0x0000000108145a68 llvm::sys::PrintStackTrace(__sFILE*) + 40
1 swift 0x0000000108145f54 SignalHandler(int) + 452
2 libsystem_platform.dylib 0x00007fff86631f1a _sigtramp + 26
3 libsystem_platform.dylib 0x00007fd0ac1eb010 _sigtramp + 633049360
4 swift 0x00000001075d4517 swift::Lowering::SILGenFunction::emitClosureValue(swift::SILLocation, swift::SILDeclRef, llvm::ArrayRef<swift::Substitution>, swift::AnyFunctionRef) + 1303
5 swift 0x00000001075c599e swift::Lowering::SILGenFunction::visitFuncDecl(swift::FuncDecl*) + 190
6 swift 0x000000010760987c swift::Lowering::SILGenFunction::visitBraceStmt(swift::BraceStmt*) + 380
7 swift 0x000000010760c8e8 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Stmt*) + 152
8 swift 0x000000010760a0a5 swift::Lowering::SILGenFunction::visitIfStmt(swift::IfStmt*) + 757
9 swift 0x000000010760c8f6 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Stmt*) + 166
10 swift 0x00000001076097e8 swift::Lowering::SILGenFunction::visitBraceStmt(swift::BraceStmt*) + 232
11 swift 0x000000010760c8e8 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Stmt*) + 152
12 swift 0x00000001075d52dd swift::Lowering::SILGenFunction::emitClosure(swift::AbstractClosureExpr*) + 205
13 swift 0x00000001075b4234 swift::Lowering::SILGenModule::emitClosure(swift::AbstractClosureExpr*) + 196
14 swift 0x00000001075eef71 (anonymous namespace)::RValueEmitter::visitAbstractClosureExpr(swift::AbstractClosureExpr*, swift::Lowering::SGFContext) + 97
15 swift 0x00000001075e1866 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 2870
16 swift 0x00000001075e24da swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 6058
17 swift 0x00000001075cfa0b swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*) + 235
18 swift 0x00000001075ae824 swift::Lowering::RValueSource::materialize(swift::Lowering::SILGenFunction&) && + 196
19 swift 0x0000000107604a69 swift::Lowering::RValueSource::materialize(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, swift::SILType) && + 233
20 swift 0x00000001075f371c swift::Lowering::SILGenFunction::emitInjectOptionalValueInto(swift::SILLocation, swift::Lowering::RValueSource&&, swift::SILValue, swift::Lowering::TypeLowering const&) + 268
21 swift 0x00000001075e9b8d swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 36445
22 swift 0x00000001075e3e2b swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 12539
23 swift 0x00000001075e202b swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 4859
24 swift 0x00000001075cfab6 swift::Lowering::SILGenFunction::emitRValue(swift::Expr*, swift::Lowering::SGFContext) + 22
25 swift 0x00000001075bffc4 (anonymous namespace)::ArgEmitter::emitExpanded(swift::Lowering::RValueSource&&, swift::Lowering::AbstractionPattern) + 836
26 swift 0x00000001075bf582 (anonymous namespace)::ArgEmitter::emit(swift::Lowering::RValueSource&&, swift::Lowering::AbstractionPattern) + 98
27 swift 0x00000001075b7ff8 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 1128
28 swift 0x00000001075b751a swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 58
29 swift 0x00000001075e0d81 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 81
30 swift 0x00000001075ea00d swift::Lowering::SILGenFunction::emitIgnoredExpr(swift::Expr*) + 237
31 swift 0x0000000107609829 swift::Lowering::SILGenFunction::visitBraceStmt(swift::BraceStmt*) + 297
32 swift 0x000000010760c8e8 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Stmt*) + 152
33 swift 0x00000001075d4ee0 swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 256
34 swift 0x00000001075b3659 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 233
35 swift 0x00000001075cea93 swift::ASTVisitor<SILGenType, void, void, void, void, void, void>::visit(swift::Decl*) + 355
36 swift 0x00000001075cd7eb SILGenType::emitType() + 203
37 swift 0x00000001075c85ae swift::Lowering::SILGenModule::visitNominalTypeDecl(swift::NominalTypeDecl*) + 30
38 swift 0x00000001075b555b swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*, unsigned int) + 395
39 swift 0x00000001075b581a swift::SILModule::constructSIL(swift::Module*, swift::SourceFile*, swift::Optional<unsigned int>) + 314
40 swift 0x00000001075b5968 swift::performSILGeneration(swift::SourceFile&, swift::Optional<unsigned int>) + 72
41 swift 0x000000010748be18 frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 3432
42 swift 0x000000010748996d main + 1677
43 libdyld.dylib 0x00007fff8aa4c5c9 start + 1
Stack dump:
0. Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -c -primary-file /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/ViewController.swift /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/AppDelegate.swift -target arm64-apple-ios8.0 -Xllvm -aarch64-use-tbi -target-cpu cyclone -target-abi darwinpcs -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.1.sdk -I /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Products/Debug-iphoneos -F /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Products/Debug-iphoneos -F /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat -g -import-objc-header /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/Re-Chat-Bridging-Header.h -module-cache-path /Users/Alec/Library/Developer/Xcode/DerivedData/ModuleCache -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-generated-files.hmap -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-own-target-headers.hmap -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-all-target-headers.hmap -Xcc -iquote -Xcc /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Re-Chat-project-headers.hmap -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Products/Debug-iphoneos/include -Xcc -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/DerivedSources/arm64 -Xcc -I/Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/DerivedSources -Xcc -DDEBUG=1 -emit-module-doc-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController~partial.swiftdoc -Onone -module-name Re_Chat -emit-module-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController~partial.swiftmodule -serialize-diagnostics-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController.dia -emit-dependencies-path /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController.d -o /Users/Alec/Library/Developer/Xcode/DerivedData/Re-Chat-awwdkmqavitiqkcdsphwnhzhzzfb/Build/Intermediates/Re-Chat.build/Debug-iphoneos/Re-Chat.build/Objects-normal/arm64/ViewController.o
1. While emitting SIL for 'signIn' at /Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/ViewController.swift:14:15
2. While silgen closureexpr SIL function @_TFFC7Re_Chat14ViewController6signInFS0_FPSs9AnyObject_T_U_FTGSQCSo6PFUser_GSQCSo7NSError__T_ for expression at [/Users/Alec/Desktop/Re-Chat/Re-Chat/Re-Chat/ViewController.swift:16:80 - line:45:9] RangeText="{
(user: PFUser!, error: NSError!) -> Void in
if user != nil {
// Do stuff after successful login.
println("Logged In")
} else {
func myMethod() {
var user = PFUser()
user.username = username.text
user.password = ""
// other fields can be set just like with PFObject
user.signUpInBackgroundWithBlock {
(succeeded: Bool!, error: NSError!) -> Void in
if error == nil {
// Hooray! Let them use the app now.
} else {
println("Signed Up")
}
}
}
println("error")
}
}"
Upvotes: 159
Views: 122989
Answers (30)
Reputation: 1241
I tried to look for all the answers in my code, same repo was successfully built in other developer's PC. but not in mine :(
It took me almost a week to fix it. I did all possible combinations of checking like deleting derived data, closing xcode, restart pc, git stash, reset none of them help. Then I copied the build command which was failing in Xcode and ran it in terminal. It failed. showed one more line
(end of response file)
clang: error: unable to execute command: Segmentation fault: 11
clang: error: linker command failed due to signal (use -v to see invocation)
Build command was more than 76K characters So I removed some parameters which are not mandatory and was able to proceed further in terminal.
So what I did to solve this problem is to take the repo from
~/Desktop/Work/PROJECT_NAME/repo/ssh/AAA
to ~/Desktop/repo/
and problem solved
Long story short, take the repo close to ~/ so that path becomes less if you face this like me. My Xcode version 12.3
Upvotes: 1
Reputation: 407
For me, it was because of passing [String : Int] instead of [String : Any]
Upvotes: 0
Reputation: 81
In my case, I forgot to remove a 'colorLiteral' (which is not assigning to any property or not passing as a method parameter) in my source code that's why the compiler was not able to compile all swift files. I just removed the 'colorLiteral' and its working fine as expected.
Upvotes: 0
Reputation: 4565
In my case this happened in Xcode 11 beta 3 with Swift 5 and using SwiftUI.
My View has a @State property like this:
@State private var normInfo: NormInfo?
the issue got solved by explicitly initializing it with nil.
Upvotes: 2
Reputation: 219
I got this error when I was trying to access a property of a singleton's struct instance from a 'static scope' within that singleton (that contains constants inside an enum that are never instantiated)
Upvotes: 0
Reputation: 7807
I came across this error in a CI build and I couldn't reproduce it locally. Turns out I was using a different version of Xcode that what my CI was using.
Upvotes: -1
Reputation: 1892
Found this to happen when using ternary statements in a WKInterfaceController (ie Watch app)!
Upvotes: -1
Reputation: 358
In my case, I was trying to extend a CoreData class with a helper method that could work on all of its subclasses:
extension ExampleCoreDataClass {
static func insert() -> Self {
...
I got no warnings about this, but when I tried to compile it the segmentation fault appeared.
After struggling for a while I used a protocol extension instead and this resolved the error:
extension NSFetchRequestResult where Self: ExampleCoreDataClass {
static func insert() -> Self {
...
Upvotes: 0
Reputation: 445
its a simple solution
Just Press cmd+shift+k
my problem is solved for clean the project
Upvotes: 0
Reputation: 914
I have same problem so I tried switch Optimization Level to Fast, Single-File Optimization[-O] instead of Fast, Whole Module Optimization then it worked, built, archive to Appstore succeed.
Some frameworks we used that need to refactor to adapt with Fast, Whole Module Optimization level I think. But I still did not find those framework.
Upvotes: 2
Reputation: 33
I had exactly the same issue, and after many hours of debugging, I found out it was because I was accessing a subscript by using .subscript() instead of between []. XCode thinks this is perfectly valid, but gives this segmentation fault error when building.
Upvotes: -1
Reputation: 1328
In my case, IGListKit refactored their class named IGListSectionController to ListSectionController , while I already had a class named ListSectionController. I used find and replace and didn't know I had a class with the same name.
class ListSectionController : ListSectionController
I read the error message in full and concluded that this error can also happen when you have Circular dependencies. This wasn't mentioned in any of the comments, I hope this helps.
Upvotes: -1
Reputation: 19622
I'm using Xcode 8.3/Swift 3
I used @Ron B.'s answer to go through all the code and comment out different functions until I got a successful build. It turns out it was async trailing closures that was causing my error:
My trailing closures:
let firstTask = DispatchWorkItem{
//self.doSomthing()
}
let secondTask = DispatchWorkItem{
//self.doSomthingElse()
}
//trailing closure #1
DispatchQueue.main.asyncAfter(deadline: .now() + 10){firstTask}
//trailing closure #2
DispatchQueue.main.asyncAfter(deadline: .now() + 20){secondTask}
Once I used the autocomplete syntax the Segmentation fault: 11
was Gone
//autocomplete syntax closure #1
DispatchQueue.main.asyncAfter(deadline: .now() + 10, execute: firstTask)
//autocomplete syntax closure #2
DispatchQueue.main.asyncAfter(deadline: .now() + 20, execute: secondTask)
Upvotes: 2
Reputation: 873
If you're using multiple versions of XCode, this error can easily happen if your paths have changed (eg. You downloaded the DMG to Desktop, extracted, but then moved XCode to Applications afterward). Carefully read the Segmentation Fault 11 error given to you in XCode, it may reference your old path which is the cause of the Segmentation Fault. If it does, you can fix it by either:
- xcode-select the correct path. Eg. sudo xcode-select -s /Applications/Xcode-beta.app/Contents/Developer/ (obviously input your correct path here)
- When installing your second version of XCode, ensure it's being extracted to the final path (extract to Applications itself) and that 'XCode.app' doesn't already exist when you do so (rename your previous one if it exists). After it's installed, you can rename both as you like.
Another potential fix for this issue:
Upgrading from El Capitan to Sierra and 'installing extra components' when launching Xcode after this upgrade fixed it for me the first time this happened.
Upvotes: 1
Reputation: 3157
I also encounterd the Segmentation fault: 11 error because I was calling a method which was returning Any object and compiler got confused to understand the object type that was being used.
Casting Any object to the required type which I was using, solved my issue.
Upvotes: 1
Reputation: 2539
I recently encountered the same problem, and I will try to generalise how I solved it, as a lot of these answers are to spesific to be of help to everyone.
1. First look at the bottom of the error message to identify the file and function which causes the segmentation fault.
2. Then I look at that function and commented out all of it. I compiled and it now worked. Then I removed the comments from parts of the function at a time, until I hit the line that was responsible for the error. After this I was able to fix it, and it all works. :)
Upvotes: 51
Reputation: 3457
I had this line in my code
weakSelf?.notifications = weakSelf?.notifications ?? [] + weakSelf?.chatNotificationDataSource ?? []
this cause Segmentation fault. But then i changed it in this way:
weakSelf?.notifications = (weakSelf?.notifications ?? []) + (weakSelf?.chatNotificationDataSource ?? [])
and app started working.
Upvotes: 1
Reputation: 5095
I got this error when getting a value from NSUserDefaults. The following gives error:
let arr = defaults.objectForKey("myArray")
What fixed the error was to cast the type to the correct type stored in NSUserDefaults. The following gives no error:
let arr = defaults.objectForKey("myArray") as! Array<String>
Upvotes: 0
Reputation: 2668
When your development target is not supporting any UIControl
In my case i was using StackView in a project with development target 8.0.
This error can happen if your development target is not supporting any UIControl.
When you set incorrect target
In below line if you leave default target "target" instead of self then Segmentation fault 11 occurs.
shareBtn.addTarget(self, action: #selector(ViewController.share(_:)), for: .touchUpInside)
Upvotes: 1
Reputation: 9907
I got segmentation fault on my Mac Mini using Xcode Bots. The seg fault did only occur during build step of testing and not during building or running locally. Only in Xcode bots during build step of testing.
I am using macOS Sierra and Xcode 8, with the code converted to Swift 2.3.
I finally found the line causing the seg fault, it was caused by:
public let isIpad = UIDevice.currentDevice().userInterfaceIdiom == .Pad
Which was declared outside a class as a constant. Changing it to check the userInterfaceIdiom at runtime fixed the issue.
Hopes this helps someone else!
This is the error log for my seg fault:
0 swift 0x000000010f93d76b llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 43
1 swift 0x000000010f93ca56 llvm::sys::RunSignalHandlers() + 70
2 swift 0x000000010f93ddbf SignalHandler(int) + 287
3 libsystem_platform.dylib 0x00007fffb24aabba _sigtramp + 26
4 libsystem_platform.dylib 0x00007fbbfff49ae0 _sigtramp + 1302982464
5 swift 0x000000010db79996 (anonymous namespace)::Traversal::visit(swift::Expr*) + 118
6 swift 0x000000010db7b880 (anonymous namespace)::Traversal::visitApplyExpr(swift::ApplyExpr*) + 128
7 swift 0x000000010db799eb (anonymous namespace)::Traversal::visit(swift::Expr*) + 203
8 swift 0x000000010db78f45 swift::Expr::walk(swift::ASTWalker&) + 53
9 swift 0x000000010d6d2c87 walkForProfiling(swift::AbstractFunctionDecl*, swift::ASTWalker&) + 231
10 swift 0x000000010d6d2719 swift::Lowering::SILGenProfiling::assignRegionCounters(swift::AbstractFunctionDecl*) + 553
11 swift 0x000000010d6de348 (anonymous namespace)::SILGenType::emitType() + 952
12 swift 0x000000010d6ddf1e swift::Lowering::SILGenModule::visitNominalTypeDecl(swift::NominalTypeDecl*) + 30
13 swift 0x000000010d6625eb swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*, unsigned int) + 731
14 swift 0x000000010d663139 swift::SILModule::constructSIL(swift::ModuleDecl*, swift::SILOptions&, swift::FileUnit*, llvm::Optional<unsigned int>, bool, bool) + 793
15 swift 0x000000010d6635a3 swift::performSILGeneration(swift::FileUnit&, swift::SILOptions&, llvm::Optional<unsigned int>, bool) + 115
16 swift 0x000000010d491c18 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&) + 12536
17 swift 0x000000010d48dc79 frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 2777
18 swift 0x000000010d489765 main + 1957
19 libdyld.dylib 0x00007fffb229e255 start + 1
Upvotes: 1
Reputation: 1708
Human Error report:
In my case, the culprit was passing in an array in the place of a variadic parameter. That is, for the signature:
// Note the variadic parameter
func addSubview(subview subview: UIView, constrain: NSLayoutAttribute...)
I passed in:
// Compile-time error, "constrain" parameters have array brackets
someUIView.addSubview(subview: someOtherView, constrain: [.Leading, .Top, .Bottom, .Trailing])
rather than:
// Correct
someUIView.addSubview(subview: someOtherView, constrain: .Leading, .Top, .Bottom, .Trailing)
Upvotes: 1
Reputation: 11
For me I was blocking the main thread.
What I did to Fix it with GCD (see below)
dispatch_async(dispatch_get_main_queue(),
})
Upvotes: 1
Reputation: 2629
In my case it was caused by trying to use a function that returned an NSNumber as an argument where a Double was expected. My advice is be careful mixing Objective C objects with Swift datatypes. And as many others have suggested, comment out lines until you pinpoint which one causes the error. (Even if you create other errors when doing so, you can just ignore them and see what makes the segmentation fault error go away.)
Upvotes: 1
Reputation: 6504
Any crash is a compiler bug (whether or not your code is valid). Try the latest beta and if it still crashes file a bug report at bugs.swift.org. The Swift team are very responsive on these.
Upvotes: 3
Reputation: 36447
I had similar issue in with Xcode 7.3 and iOS 9.3.
Command failed due to signal: Segmentation fault: 11
Basic steps such as Clean (cmd+shift+k) code, Delete derived data and Quit Xcode didn't work.
There was some culprit in my code.
It was [txtUserName.text.characters.count = 0]
In your case Review your code and fix the culprit.
Upvotes: 4
Reputation: 1129
In my case I had declared the following property in one of my ViewControllers subclass:
@property NSString * title
I think this was conflicting with the already existing title property in ViewController. I renamed this property to something else and refactored its use and the error disappeared.
Upvotes: 1
Reputation: 12389
I have experienced the same issue on my first try with Realm.io. The reason for the error was that I have named my target Realm and that caused namespace clashing. The issue was resolved after I have changed my project and target name into something else, as explained on this issue.
My suggestion is to check for similar namespace clashes.
Upvotes: 0
Reputation: 413
I also ran into this problem.... obviously, it is a general error or sorts... when the xcode gets confused.... in my case, I had 3 vars that I was assigning values to from an array.... but I did not specify the type of data in each element of the array.... once I did, it resolved the problem....
Upvotes: 1
Reputation: 2193
object.doubleValue = dict["doublevalue"] as! Int
I found the reason after rolling back each step I made.... force casting to Int for a Double variable
Upvotes: 7
Reputation: 340
None of these answers worked for me but I found my issue. It had to do with Error Handling (in the Disabling Error Propagation section). I had this method:
func getSlider() throws -> UISlider {
... // code that could throw an error
return UISlider()
}
Referencing it like this:
func anotherMethod() -> Float {
return try! getSlider().value
}
gave the error. But, when switching to this, it went away:
func anotherMethod() -> Float {
return (try! getSlider()).value
}
Upvotes: 1
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