In this version of iOS our web extension is not allowed to run after allowing it run on all sites via clicking the aA icon in safari. Quitting safari makes it work so it is like the permisions are set but the extension code is never injected into the browser, this behaviour has been replicated with multiple different extension form different vendors.

I'm experiencing a Safari Web Extension issue where the non-persistant background script seems to crash after 30 seconds even when the content script is messaging it. Here is a minimal-reproducible example. When running in an emulator, the background script will stay responsive forever. However, when running on a physical device, the background script becomes non-responsive after 30 seconds of activity. It never becomes responsive again until I toggle the extensions enable/disable toggle, after which it stays active for 30 seconds and then crashes again.

My Safari Web Extension uses a service worker and an IndexedDB database (IDB). For what hidden reason or perverse logic when deleting the Safari history all service workers are brutally shutted down and the database emptied of all its contents? And I heard about local storage too... It happens all the time in Safari macOS and iOS. Safari is the only browser in the world that takes the liberty of deleting what it shouldn't. Good Job indeed.

I created a Xcode project to test the DNR updateDynamicRules API performances on Safari (MacOS). https://github.com/radiolondra/TestUpdateDynamicRules Following the instructions in the README file, it's possible to test the extension on Chromium and Firefox browsers (on Windows). The project uses 2 json files containing static rules, enabled by default in the manifest file. These static rules are automatically installed in the browser when the extension is installed. Using the extension popup it is possible to add/remove just one very simple dynamic rule in the browser, a rule that acts on a predefined test domain (https://iana.org). What we want to measure is the time it takes for each browser to add/remove that one dynamic rule. The results for Safari are unacceptable to say the least: Safari: from 6000 to 8000 MILLISECONDS (6/8 seconds!) <<<<<<<<< Chrome: from 5 to 6 MILLISECONDS Firefox: from 5 to 7 MILLISECONDS Notice the time needed by Safari... It would be a good idea to take a look at this monstrosity. Thanks.

I have a link that is embedded in the app using WKWebView. This link is working fine in the Macbook Safari browser, But it's not open in iPhone Safari and wkWebView in the app.

1.WebKit WebKit::WebURLSchemeHandler::stopTask(WebKit::WebPageProxy&, unsigned long long) + 80 2.WebKit WebKit::WebURLSchemeHandler::stopTask(WebKit::WebPageProxy&, unsigned long long) + 80 3.WebKit WebKit::WebURLSchemeHandler::stopAllTasksForPage(WebKit::WebPageProxy&) + 108 4.WebKit WebKit::WebPageProxy::stopAllURLSchemeTasks() + 260 5.WebKit WebKit::WebPageProxy::close() + 1168 6.WebKit -[WKWebView dealloc] + 128 7.XHBUIKit -[XHBWebView dealloc] + 84 8.Foundation _NSKVODeallocate + 184 WKWebView 在dealloc 时崩溃，我该怎么处理。

iOS 17.5.1 Xcode WebKit Crash Hello, I have two iPhone devices that I have. These devices are iOS17.5.1, and all Wk related codes cause Crash. Crash occurs when Xcode Build is complete and the app is running. If you run without connecting to Xcode, Crash does not occur. Error: Thread 1: EXC_BREAKPOINT (code=1, subcode=0x19e88fa18) Xcode 15.4, MacBook Pro 14 Sonoma 14.5 There was no issue with iOS 16.5. WKWebsiteDataStore.default() .fetchDataRecords(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes()) { records in records .forEach { WKWebsiteDataStore.default() .removeData(ofTypes: $0.dataTypes, for: [$0], completionHandler: {}) } } let webConfiguration = WKWebViewConfiguration()webConfiguration.preferences.javaScriptCanOpenWindowsAutomatically = true

Recently, our app has received feedback that WKWebview will get stuck when opening some web pages, and then the entire web page in the app will have problems opening. The feedback group is iOS17.5 or iOS17.5.1, other systems do not have this problem. Have you ever encountered such problems？ and what direction should be taken to solve this problem?

Hello there. 👋🏻 Recently I updated macOS and Safari to latest versions. And after that, Safari crashed randomly, but exactly when I open tab in preview by long tab on link. I tried uninstall all extensions and clean all caches and another trash – it not helps me. Any idea? Thank you in advance!

I have an extension that opens the start page after installation with the URL: safari-web-extension://my-web-extension-page.html It's not possible on this page to open any link on a new tab if the link has attribute target="_blank" or even with "Command (⌘) + click" combination Are there any restrictions on pages with protocol safari-web-extension://?

Hi In my app I've to complete the IDV [Identity verification] by capturing the face os user and his/her documents, for this the backend developer provides me the URL from the IDV 3rd party, which URL I do open in webview, so before during loading the camera captureing screen in webview the Live Broadcast screen pops up from no where. I don't want this Live Broadcast screen but somehow it opens anyway. Although it is good thing that my expected camera screen was still open in background so I can go further from there. First time I'm also bit confused like how this kind of screen popsup even if I did't code for it. Also it takes me a little bit time to figure out how to close that screen. Simple peoples/users who're going to use my app they don't know how to close it. Please check the screenshots I attached. Please help me to rid of this popup. Thank You

I have a sample iOS app in Xcode that I run in the iOS 17.5 Simulator. It creates a WKWebView and configures a proxy via the ProxyConfiguration API, it works as expected unless the proxy tries to establish mTLS. It seems there is no way to handle the client certificate request when using a proxy. If I navigate to a page that requests mTLS without a proxy configured, it works as expected. Here is a minimal repro: #import "ViewController.h" #import &lt;WebKit/WebKit.h&gt; @import Foundation; @import WebKit; @interface ViewController () &lt;WKNavigationDelegate&gt; @property (nonatomic,strong) WKWebView* webView; @property (nonatomic, strong) WKWebViewConfiguration * webConfig; @end @implementation ViewController - (void)loadView { [super loadView]; nw_protocol_options_t tls_options = nw_tls_create_options(); sec_protocol_options_t sec_options = nw_tls_copy_sec_protocol_options(tls_options); sec_protocol_options_set_challenge_block( sec_options, ^(sec_protocol_metadata_t metadata, sec_protocol_challenge_complete_t challenge_complete) { NSLog(@"Inside of challenge block"); challenge_complete(nil); }, dispatch_get_main_queue()); nw_endpoint_t proxy_endpoint = nw_endpoint_create_host(GetHost(), GetPort()); nw_relay_hop_t relay = nw_relay_hop_create(nil, proxy_endpoint, tls_options); nw_proxy_config_t proxy_config = nw_proxy_config_create_relay(relay, nil); nw_proxy_config_add_match_domain(proxy_config, "api.ipify.org"); self.webConfig = [[WKWebViewConfiguration alloc] init]; self.webConfig.websiteDataStore = [WKWebsiteDataStore nonPersistentDataStore]; self.webConfig.websiteDataStore.proxyConfigurations = @[ proxy_config ]; self.webView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:self.webConfig]; self.webView.navigationDelegate = self; [self.view addSubview:self.webView]; } - (void)viewDidLoad { [super viewDidLoad]; NSLog(@"%s",__func__); NSURL* url = [[NSURL alloc] initWithString:@"https://api.ipify.org"]; NSURLRequest* request = [[NSURLRequest alloc] initWithURL:url]; [self.webView loadRequest:request]; } - (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation { NSLog(@"%s",__func__); } - (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error { NSLog(@"%s. Error %@",__func__,error); } - (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential *))completionHandler { NSLog(@"%s",__func__); NSLog(@"protection space: %@", challenge.protectionSpace.authenticationMethod); completionHandler(NSURLSessionAuthChallengePerformDefaultHandling, nil); } @end The logs for this code show: -[ViewController viewDidLoad] -[ViewController webView:didStartProvisionalNavigation:] -[ViewController webView:didFailProvisionalNavigation:withError:]. Error Error Domain=NSURLErrorDomain Code=-1206 "The server “api.ipify.org” requires a client certificate." If we don't set up the ProxyConfiguration and navigate to a site that requires mTLS, the logs look like this: -[ViewController viewDidLoad] -[ViewController webView:didReceiveAuthenticationChallenge:completionHandler:] protection space: NSURLAuthenticationMethodServerTrust -[ViewController webView:didReceiveAuthenticationChallenge:completionHandler:] protection space: NSURLAuthenticationMethodClientCertificate -[ViewController webView:didStartProvisionalNavigation:] //... Eventually the request fails but the key difference is that didReceiveAuthenticationChallenge was invoked. When using the ProxyConfiguration neither that function nor the block we set via sec_protocol_options_set_challenge_block were run. I also tried to provide the client identity via sec_protocol_options_set_local_identity to no avail, and I've tried configuring these options too but they had no effect sec_protocol_options_add_tls_application_protocol(sec_options, "h2"); sec_protocol_options_set_max_tls_protocol_version(sec_options, tls_protocol_version_TLSv13); sec_protocol_options_set_peer_authentication_required(sec_options, true); Am I missing something? Or is this a bug in the ProxyConfiguration API?

We are requesting some information on what should be done in the following case: We have an application that has a privacy manifest, where tracking domains are listed. When the user does not give his/her consent to be tracked, non tracking domains are being used for requests to bring ads. The application in question has a webview where content (ads) are loaded. When a user clicks on an ad, another webview is opened, and this webview does not know that it is in a non tracking flow. Therefore, tracking domains are being used instead of non tracking domains. Since multiple redirections might be in play, there is no way to pass data from the original webview to the one that is opened once the ad is clicked. Would the tracking domains being used in the second webview be blocked? If so, what can we do to circumvent this scenario? Is this even a use case considering privacy manifest? Thanks

【現象】 Safariブラウザでcanvasに対して任意の描画をした後、clearRect()を実行します。 その後、canvasの親divに対して visibility: hidden を設定すると、消したはずの描画が復活します。 但し、親divは正常に visibility: hidden が働いているので描画されなくなります。 また、この現象はブラウザの拡大率が影響をしているようです。 少なくとも後述のリスト内のMacbookAirでは、拡大率が100%の場合にのみ発生しています。 この現象は過去のバージョンでは起きてないようです。 このバグを修正する予定はありますか？ 【機種】 機種は以下のリストを確認してください。 Model OS&Version Y/N version MacbookAir M2 2022 macOS Sonoma 14.4.1 y 17.4.1 Mac Studio 2022 Apple M1 Max macOS Monterey 12.5 n 16.0 MacBook Air M1 2020 macOS Sonoma 14.3.1 n 17.3.1 iPadPro gen6 iPadOS 17.4.1 y - iPad gen10 iPadOS 17.4.1 n - 【デモ】 現象を確認するためのデモは以下のHTMLファイルを保存してブラウザで開いてください。 再現手順はボタンを draw -> clear -> hide の順番に押してください。 黄色の親divが非表示になるのに対し、canvasからclearしたはずの黒い四角が表示されます。 <html> <body onload="onLoad()"> <div id="parent" style="background-color: yellow;"> <canvas id="canvas"></canvas> </div> <button onclick="drawCanvas()">draw</button> <button onclick="clearCanvas()">clear</button> <button onclick="showCanvas()">show</button> <button onclick="hideCanvas()">hide</button> <script> let parent let canvas let context2d function onLoad() { parent = document.getElementById("parent") canvas = document.getElementById("canvas") context2d = canvas.getContext('2d') } function drawCanvas() { context2d.fillRect(0, 0, 100, 100) } function clearCanvas() { context2d.clearRect(0, 0, canvas.width, canvas.height) } function showCanvas() { parent.style.visibility = "visible" } function hideCanvas() { parent.style.visibility = "hidden" } </script> </body> </html>

I have a mind mapping app that has been running well on Android for a few years now. I have been trying to publish it for iOS and MacOS for some time now. On iOS (as an app) and MacOS (in the browser for testing) I have a problem with the export. The app is a project in Angular, Cordova, Typescript. The problem only occurs in the Safari browser, which is also used in the Cordova version for iOS. I was able to test it on my Mac and an iPhone. The error does not occur on the Mac in Chrome. The Problem If I export a mind map that contains images as an image (.png), the images of the nodes are not displayed in the exports. Everything else in the map is exported correctly, only the images are missing. Only when I export the map three times are the images present in the export. If I add a new image and export it again, the image is only visible in the exported image after 3 exports. It is interesting that the export as SVG, which I also offer, contains the images of the nodes. So the SVG string that I create has all the necessary information. The base The mind map consists of various things. HTML and CSS for the frames, lines etc... The images of the nodes are saved as Base64 and each node is in a Foreign Object. Example of the SVG export Mindmap with 2 nodes and the Base64 characters of the node images have been replaced with ***. __ SVG-String.txt Attached because otherwise too long. This is how I export the .png file. I can view all this content in the map view of the app. When exporting to an image, I take this information, turn it into an SVG, have the browser draw it on the canvas and then output it as a graphic. Something must be going wrong at this point. private exportAsImage( mindMap: MindMap, scale?: number, type: string = "png" ): Observable<any> { return new Observable(o => { this.progress.start(this.progress.PROGRESS_MAJOR); this.mmpMap.export(this.mapVizService.getExportClassList(mindMap), (svgStr: string) => { this.exportService.imageFromSVGString(svgStr, type, scale).pipe( switchMap(img => of( Utils.dataURItoFileObject( img.dataUri, `${Utils.sanitizeFilename(mindMap.title)}.${type}` ) ) ), switchMap((fileObject: FileObject) => this.mapsService.saveAsTemp(fileObject, true, { message: this.translate.instant("mdz.mindmap.saveas.message"), // subject: this.translate.instant("mdz.mindmap.saveas.subject"), subject: fileObject.name, url: `www.myURL.com` }, true) ) ).subscribe(() => { this.progress.stop(this.progress.PROGRESS_MAJOR); o.next(); o.complete(); }, err => { this.progress.stop(this.progress.PROGRESS_MAJOR); o.error(err); o.complete(); }); }) }); } What I have already tried. I have already tested various things such as time delays etc..., none of which change anything. It seems to me that it's a combination of the caching and the order or speed at which the images are loaded. Only the speed can't be, because built-in delays don't change anything. My guess But it must have something to do with Safari because on the Mac in Chrome it runs without problems... Maybe it can't handle so many base64 images or it exports faster than it renders? Whereby the SVG export contains all the information and when I open the SVG, all the content is also displayed in the browser in seconds. So something must happen when painting on the canvas and outputting as an image. It doesn't really make sense, I'm really at the end of my ideas. What can you do? I really hope you can help me. A mind mapping app without image export makes little sense. And since the app otherwise works great, I'm really getting desperate. :( Thanks a lot! Rob

If you write about multiple lines when entering code into the prompt, it will be open, but there is no way to check the topmost written code. It does not expose 1 to 3 lines, nor does it provide scrolling. I think it should work like Google Chrome or there should be a way to solve this within safari. If there's any way I don't know, please help.

I want to implement in-app purchases for my Mac Safari web extension. I can think of two ways: Draw the payment UI in an extension web page, and send a message to the native extension app to call StoreKit code. Open the container app from an extension web page, where the app draws the payment UI. I couldn't make #1 work with either StoreKit 2, which is async, and context.completeRequest(returningItems:) doesn't want to be called in a Task, saying context is not sendable) or StoreKit 1, where calling context.completeRequest(returningItems:) in paymentQueue(_:updatedTransactions:) for some reason doesn't return a response to the extension's web page. I couldn't make #2 work because I couldn't find a way to open the container app from the web extension. I registered a custom URL for my container app, but context.open that url does nothing. Web extensions that use IAP with #2 are available on the Mac app store, so it must be possible, could anyone shed some light on how to open the container app and pass the purchased info to the extension web page even if the container app is not open? Thanks in advance.

I have the following html that is opened in a WKWebView. <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Popup Window Test</title> </head> <body> <textarea id="myTextarea" cols="5" rows="1">Empty</textarea> <script> function openWindow() { const popup = window.open( "https://www.apple.com/", "PopupSample", "width=400,height=400,dialog=yes,dependent=yes,scrollbars=yes,location=yes" ); console.log("Popup closed: ", popup.closed); document.getElementById("myTextarea").value = popup.closed ? "Closed" : "Open"; const timer = setInterval(() => { console.log(popup.location.href); if (popup.closed) { clearInterval(timer); console.log("Popup closed: ", popup.closed); document.getElementById("myTextarea").value = "Closed"; } }, 1000); } </script> <button onclick="openWindow()">Open Window</button> </body> </html> When I click the button and open page "https://www.apple.com/" in another WKWebView, the javascript code does not work as expected here, the popup object returned from window.open() does not refer to the valid window object, and the closed property is set to true even the new popup window is still alive. This is a regression since MacOS14.4 updated, I've reported to apple DTS, but they said it's out of their scope. Does anyone has any clue about this?

- (void)viewDidLoad { [super viewDidLoad]; UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(rightButtonTapped:)]; self.navigationItem.rightBarButtonItem = rightButton; WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init]; _webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:configuration]; _webView.navigationDelegate = self; [self.view addSubview:_webView]; NSURL *url = [NSURL URLWithString:@"https://www.apple.com"]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; [_webView loadRequest:request]; } - (void)rightButtonTapped:(UIBarButtonItem *)sender { NSLog(@"self.webView.scrollView.contentSize.height:%f", self.webView.scrollView.contentSize.height); WKSnapshotConfiguration* configuration = [WKSnapshotConfiguration new]; configuration.rect = CGRectMake(0, 0, self.webView.scrollView.contentSize.width, self.webView.scrollView.contentSize.height); // configuration.afterScreenUpdates = NO; [self.webView takeSnapshotWithConfiguration:configuration completionHandler:^(UIImage * _Nullable snapshotImage, NSError * _Nullable error) { if (error) { NSLog(@"fail"); } else { NSLog(@"succ"); } }]; } Running the code above, I get a blank image

Our app collected some JavaScriptCore crash information on iOS17 and above systems, but the cause of the error cannot be located. The crash stack is as follows: #27 Heap Helper Thread SIGSEGV 0 JavaScriptCore JSC::MarkedBlock::aboutToMarkSlow(unsigned int) 1 JavaScriptCore JSC::JSFinalObject::visitChildren(JSC::JSCell*, JSC::SlotVisitor&amp;amp;) 2 JavaScriptCore JSC::JSFinalObject::visitChildren(JSC::JSCell*, JSC::SlotVisitor&amp;amp;) 3 JavaScriptCore JSC::SlotVisitor::drain(***::MonotonicTime) 4 JavaScriptCore JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, ***::MonotonicTime) 5 JavaScriptCore ***::SharedTaskFunctor&amp;lt;void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_15&amp;gt;::run() 6 JavaScriptCore ***::ParallelHelperClient::runTask(***::RefPtr&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt;, ***::RawPtrTraits&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt; &amp;gt;, ***::DefaultRefDerefTraits&amp;lt;***::SharedTask &amp;lt;void ()&amp;gt; &amp;gt; &amp;gt; const&amp;amp;) 7 JavaScriptCore ***::ParallelHelperPool::Thread::work() 8 JavaScriptCore ***::Detail::CallableWrapper&amp;lt;***::AutomaticThread::start(***::AbstractLocker const&amp;amp;)::$_0, void&amp;gt;::call() 9 JavaScriptCore ***::Thread::entryPoint(***::Thread::NewThreadContext*) 10 JavaScriptCore ***::wtfThreadEntryPoint(void*) 11 libsystem_pthread.dylib __pthread_start #1 Queue: com.apple.main-thread SIGSEGV 0 libobjc.A.dylib _objc_msgSend 1 UIKitCore -[UIView(Geometry) convertPoint:toView:] #24 JSC Heap Collector Thread SIGSEGV 0 libsystem_kernel.dylib ___psynch_cvwait 1 libsystem_pthread.dylib __pthread_cond_wait 2 JavaScriptCore ***::ThreadCondition::timedWait(***::Mutex&amp;amp;, ***::WallTime) 3 JavaScriptCore ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda&amp;lt;bool ()&amp;gt; const&amp;amp;, ***::ScopedLambda&amp;lt;void ()&amp;gt; const&amp;amp;, ***::TimeWithDynamicClockType const&amp;amp;) 4 JavaScriptCore bool ***::Condition::waitUntilUncheckedWTF::Lock(***::Lock&amp;amp;, ***::TimeWithDynamicClockType const&amp;amp;) 5 JavaScriptCore JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, ***::MonotonicTime) 6 JavaScriptCore JSC::Heap::runConcurrentPhase(JSC::GCConductor) 7 JavaScriptCore JSC::Heap::runCurrentPhase(JSC::GCConductor, JSC::CurrentThreadState*) 8 JavaScriptCore JSC::Heap::HeapThread::work() 9 JavaScriptCore ***::Detail::CallableWrapper&amp;lt;***::AutomaticThread::start(***::AbstractLocker const&amp;amp;)::$_0, void&amp;gt;::call() 10 JavaScriptCore ***::Thread::entryPoint(***::Thread::NewThreadContext*) 11 JavaScriptCore ***::wtfThreadEntryPoint(void*) 12 libsystem_pthread.dylib __pthread_start #25 Heap Helper Thread SIGSEGV 0 libsystem_kernel.dylib ___psynch_cvwait 1 libsystem_pthread.dylib __pthread_cond_wait 2 JavaScriptCore ***::ThreadCondition::timedWait(***::Mutex&amp;amp;, ***::WallTime) 3 JavaScriptCore ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda&amp;lt;bool ()&amp;gt; const&amp;amp;, ***::ScopedLambda&amp;lt;void ()&amp;gt; const&amp;amp;, ***::TimeWithDynamicClockType const&amp;amp;) 4 JavaScriptCore bool ***::Condition::waitUntilUncheckedWTF::Lock(***::Lock&amp;amp;, ***::TimeWithDynamicClockType const&amp;amp;) 5 JavaScriptCore JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, ***::MonotonicTime) 6 JavaScriptCore ***::SharedTaskFunctor&amp;lt;void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_15&amp;gt;::run() 7 JavaScriptCore ***::ParallelHelperClient::runTask(***::RefPtr&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt;, ***::RawPtrTraits&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt; &amp;gt;, ***::DefaultRefDerefTraits&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt; &amp;gt; &amp;gt; const&amp;amp;) 8 JavaScriptCore ***::ParallelHelperPool::Thread::work() 9 JavaScriptCore ***::Detail::CallableWrapper&amp;lt;***::AutomaticThread::start(***::AbstractLocker const&amp;amp;)::$_0, void&amp;gt;::call() 10 JavaScriptCore ***::Thread::entryPoint(***::Thread::NewThreadContext*) 11 JavaScriptCore ***::wtfThreadEntryPoint(void*) 12 libsystem_pthread.dylib __pthread_start #27 Heap Helper Thread SIGSEGV 0 libsystem_kernel.dylib ___psynch_cvwait 1 libsystem_pthread.dylib __pthread_cond_wait 2 JavaScriptCore ***::ThreadCondition::timedWait(***::Mutex&amp;amp;, ***::WallTime) 3 JavaScriptCore ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda&amp;lt;bool ()&amp;gt; const&amp;amp;, ***::ScopedLambda&amp;lt;void ()&amp;gt; const&amp;amp;, ***::TimeWithDynamicClockType const&amp;amp;) 4 JavaScriptCore bool ***::Condition::waitUntilUncheckedWTF::Lock(***::Lock&amp;amp;, ***::TimeWithDynamicClockType const&amp;amp;) 5 JavaScriptCore JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, ***::MonotonicTime) 6 JavaScriptCore ***::SharedTaskFunctor&amp;lt;void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_15&amp;gt;::run() 7 JavaScriptCore ***::ParallelHelperClient::runTask(***::RefPtr&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt;, ***::RawPtrTraits&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt; &amp;gt;, ***::DefaultRefDerefTraits&amp;lt;***::SharedTask&amp;lt;void ()&amp;gt; &amp;gt; &amp;gt; const&amp;amp;) 8 JavaScriptCore ***::ParallelHelperPool::Thread::work() 9 JavaScriptCore ***::Detail::CallableWrapper&amp;lt;***::AutomaticThread::start(***::AbstractLocker const&amp;amp;)::$_0, void&amp;gt;::call() 10 JavaScriptCore ***::Thread::entryPoint(***::Thread::NewThreadContext*) 11 JavaScriptCore ***::wtfThreadEntryPoint(void*) 12 libsystem_pthread.dylib __pthread_start Please help analyze and locate the cause. Has anyone else encountered this problem?