Null dereference crash un ApplicationCacheGroup::startLoadingEntry(): Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 WebCore 0x00000001a08e79e0 WTF::Function<void (std::experimental::fundamentals_v3::expected<WTF::RefPtr<WebCore::ApplicationCacheResource, WTF::DumbPtrTraits<WebCore::ApplicationCacheResource> >, WebCore::ApplicationCacheResourceLoader::Error>&&)>::CallableWrapper<WebCore::ApplicationCacheGroup::startLoadingEntry()::$_1>::call(std::experimental::fundamentals_v3::expected<WTF::RefPtr<WebCore::ApplicationCacheResource, WTF::DumbPtrTraits<WebCore::ApplicationCacheResource> >, WebCore::ApplicationCacheResourceLoader::Error>&&) + 76 (CachedResourceHandle.h:38) 1 WebCore 0x00000001a08d9604 WebCore::ApplicationCacheResourceLoader::create(unsigned int, WebCore::CachedResourceLoader&, WebCore::ResourceRequest&&, WTF::CompletionHandler<void (std::experimental::fundamentals_v3::expected<WTF::RefPtr<WebCore::ApplicationCacheResource, WTF::DumbPtrTraits<WebCore::ApplicationCacheResource> >, WebCore::ApplicationCacheResourceLoader::Error>&&)>&&) + 416 (Function.h:56) 2 WebCore 0x00000001a08d9604 WebCore::ApplicationCacheResourceLoader::create(unsigned int, WebCore::CachedResourceLoader&, WebCore::ResourceRequest&&, WTF::CompletionHandler<void (std::experimental::fundamentals_v3::expected<WTF::RefPtr<WebCore::ApplicationCacheResource, WTF::DumbPtrTraits<WebCore::ApplicationCacheResource> >, WebCore::ApplicationCacheResourceLoader::Error>&&)>&&) + 416 (Function.h:56) 3 WebCore 0x00000001a08da1d8 WebCore::ApplicationCacheGroup::startLoadingEntry() + 672 (ApplicationCacheGroup.cpp:906) 4 WebCore 0x00000001a08d9cf8 WebCore::ApplicationCacheGroup::didFinishLoadingEntry(WebCore::URL const&) + 1260 (RefCounted.h:0) 5 WebCore 0x00000001a08df6f4 WebCore::ApplicationCacheResourceLoader::notifyFinished(WebCore::CachedResource&) + 144 (Function.h:56) 6 WebCore 0x000000019f9128ac WebCore::CachedResource::checkNotify() + 296 (CachedResource.cpp:341) 7 WebCore 0x00000001a08f382c WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) + 608 (CachedResource.cpp:357) 8 WebCore 0x00000001a08ccf80 WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) + 528 (SubresourceLoader.cpp:637) 9 WebKit 0x00000001a68dde60 WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics const&) + 228 (WebResourceLoader.cpp:160) 10 WebKit 0x00000001a68def4c void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)) + 92 (HandleMessage.h:40) 11 WebKit 0x00000001a66ca6f4 WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&, IPC::Decoder&) + 520 (NetworkProcessConnection.cpp:72) 12 WebKit 0x00000001a663392c IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) + 164 (Connection.cpp:906) 13 WebKit 0x00000001a663630c IPC::Connection::dispatchOneMessage() + 232 (Connection.cpp:964) 14 JavaScriptCore 0x000000019e3c6b44 WTF::RunLoop::performWork() + 340 (Function.h:56) 15 JavaScriptCore 0x000000019e3c6dcc WTF::RunLoop::performWork(void*) + 36 (RunLoopCF.cpp:38) 16 CoreFoundation 0x00000001967bd900 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 (CFRunLoop.c:1980) 17 CoreFoundation 0x00000001967bd880 __CFRunLoopDoSource0 + 88 (CFRunLoop.c:2015) 18 CoreFoundation 0x00000001967bd15c __CFRunLoopDoSources0 + 176 (CFRunLoop.c:2051) 19 CoreFoundation 0x00000001967bae1c __CFRunLoopRun + 1048 (CFRunLoop.c:2922) 20 CoreFoundation 0x00000001966f4abc CFRunLoopRunSpecific + 436 (CFRunLoop.c:3247) 21 Foundation 0x0000000197170544 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 300 (NSRunLoop.m:367) 22 Foundation 0x00000001971e1920 -[NSRunLoop(NSRunLoop) run] + 88 (NSRunLoop.m:389) 23 libxpc.dylib 0x000000019647f854 _xpc_objc_main + 516 (main.m:170) 24 libxpc.dylib 0x0000000196481944 xpc_main + 180 (init.c:1476) 25 com.apple.WebKit.WebContent 0x00000001048375ac main + 380 (XPCServiceMain.mm:160) 26 libdyld.dylib 0x000000019626e4cc 0x19626d000 + 5324
<rdar://problem/40793716>
Created attachment 343532 [details] Patch
Comment on attachment 343532 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=343532&action=review > Source/WebCore/loader/appcache/ApplicationCacheGroup.cpp:907 > + m_entryLoader = ApplicationCacheResourceLoader::create(m_pendingEntries.begin()->value, documentLoader.cachedResourceLoader(), WTFMove(request), [this, requestURL] (auto&& resourceOrError) { We should probably [this, requestURL = WTFMove(requestURL)] > Source/WebCore/loader/appcache/ApplicationCacheGroup.cpp:912 > + this->didFailLoadingEntry(error, m_entryLoader ? m_entryLoader->resource()->url() : requestURL); Can we just always use requestURL?
Created attachment 343533 [details] Patch
The commit-queue encountered the following flaky tests while processing attachment 343533 [details]: performance-api/performance-observer-no-document-leak.html bug 187015 (author: cdumez@apple.com) The commit-queue is continuing to process your patch.
Comment on attachment 343533 [details] Patch Clearing flags on attachment: 343533 Committed r233171: <https://trac.webkit.org/changeset/233171>
All reviewed patches have been landed. Closing bug.