238681 2022-04-01 13:17:39 -0700 REGRESSION (iOS 15.4): Chrome sometimes hangs in bmalloc_medium_bitfit_create_page_header 2022-04-04 10:52:22 -0700 1 1 1 Unclassified WebKit bmalloc WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 236798 InRadar P2 Normal --- 1 ajuma webkit-unassigned ggaren saam webkit-bug-importer ysuzuki oldest_to_newest 1857380 0 ajuma 2022-04-01 13:17:39 -0700 Chrome for iOS is getting reports of a hang that's new to iOS 15.4, in bmalloc_medium_bitfit_create_page_header. There's no clear correlation to any particular website. Here's a sample stack: 0x00000001badf0688 (libsystem_kernel.dylib + 0x00001688) __ulock_wait 0x00000001db779120 (libsystem_platform.dylib + 0x00008120) _os_unfair_lock_lock_slow 0x000000018bf8b374 (JavaScriptCore + 0x00000000010f8374) bmalloc_medium_bitfit_create_page_header 0x000000018bf9a968 (JavaScriptCore + 0x0000000001107968) pas_bitfit_allocator_commit_view 0x000000018bf8c348 (JavaScriptCore + 0x00000000010f9348) bmalloc_medium_bitfit_page_config_specialized_allocator_try_allocate 0x000000018bf90938 (JavaScriptCore + 0x00000000010fd938) bmalloc_heap_config_specialized_local_allocator_try_allocate_slow 0x000000018bf7a9f0 (JavaScriptCore + 0x00000000010e79f0) bmalloc_allocate_impl_casual_case 0x000000018bc55d50 (JavaScriptCore + 0x00dc2d50) JSC::StructureIDTable::StructureIDTable() 0x000000018b6e38dc (JavaScriptCore + 0x008508dc) JSC::Heap::Heap(JSC::VM&, JSC::HeapType) 0x000000018bc80f6c (JavaScriptCore + 0x00dedf6c) JSC::VM::VM(JSC::VM::VMType, JSC::HeapType, WTF::RunLoop*, bool*) 0x000000018bc8654c (JavaScriptCore + 0x00df354c) JSC::VM::createContextGroup(JSC::HeapType) 0x000000018b1b62f8 (JavaScriptCore + 0x003232f8) JSContextGroupCreate 0x000000018ae95298 (JavaScriptCore + 0x00002298) -[JSVirtualMachine init] 0x000000018ae952ec (JavaScriptCore + 0x000022ec) -[JSContext init] 0x000000018e72d0ac (WebKit + 0x0020c0ac) API::SharedJSContext::ensureContext() 0x000000018e72d000 (WebKit + 0x0020c000) API::SerializedScriptValue::deserialize(WebCore::SerializedScriptValue&, OpaqueJSValue const**) 0x000000018e79e32c (WebKit + 0x0027d32c) WTF::Detail::CallableWrapper<-[WKWebView _evaluateJavaScript:asAsyncFunction:withSourceURL:withArguments:forceUserGesture:inFrame:inWorld:completionHandler:]::$_22, void, std::experimental::fundamentals_v3::expected<WTF::RefPtr<API::SerializedScriptValue, WTF::RawPtrTraits<API::SerializedScriptValue>, WTF::DefaultRefDerefTraits<API::SerializedScriptValue> >, WebCore::ExceptionDetails>&&>::call(std::experimental::fundamentals_v3::expected<WTF::RefPtr<API::SerializedScriptValue, WTF::RawPtrTraits<API::SerializedScriptValue>, WTF::DefaultRefDerefTraits<API::SerializedScriptValue> >, WebCore::ExceptionDetails>&&) 0x000000018ea19c0c (WebKit + 0x004f8c0c) WTF::Detail::CallableWrapper<WebKit::WebPageProxy::runJavaScriptInFrameInScriptWorld(WebCore::RunJavaScriptParameters&&, std::__1::optional<WTF::ObjectIdentifier<WebCore::FrameIdentifierType> >, API::ContentWorld&, WTF::CompletionHandler<void (std::experimental::fundamentals_v3::expected<WTF::RefPtr<API::SerializedScriptValue, WTF::RawPtrTraits<API::SerializedScriptValue>, WTF::DefaultRefDerefTraits<API::SerializedScriptValue> >, WebCore::ExceptionDetails>&&)>&&)::$_26, void, WTF::Span<unsigned char const, 18446744073709551615ul>&&, std::__1::optional<WebCore::ExceptionDetails>&&>::call(WTF::Span<unsigned char const, 18446744073709551615ul>&&, std::__1::optional<WebCore::ExceptionDetails>&&) 0x000000018ec76288 (WebKit + 0x00755288) Messages::WebPage::RunJavaScriptInFrameInScriptWorld::callReply(IPC::Decoder&, WTF::CompletionHandler<void (WTF::Span<unsigned char const, 18446744073709551615ul>&&, std::__1::optional<WebCore::ExceptionDetails>&&)>&&) 0x000000018ea198e0 (WebKit + 0x004f88e0) WTF::Detail::CallableWrapper<unsigned long long IPC::MessageSender::sendWithAsyncReply<Messages::WebPage::RunJavaScriptInFrameInScriptWorld, WebKit::WebPageProxy::runJavaScriptInFrameInScriptWorld(WebCore::RunJavaScriptParameters&&, std::__1::optional<WTF::ObjectIdentifier<WebCore::FrameIdentifierType> >, API::ContentWorld&, WTF::CompletionHandler<void (std::experimental::fundamentals_v3::expected<WTF::RefPtr<API::SerializedScriptValue, WTF::RawPtrTraits<API::SerializedScriptValue>, WTF::DefaultRefDerefTraits<API::SerializedScriptValue> >, WebCore::ExceptionDetails>&&)>&&)::$_26>(Messages::WebPage::RunJavaScriptInFrameInScriptWorld&&, WebKit::WebPageProxy::runJavaScriptInFrameInScriptWorld(WebCore::RunJavaScriptParameters&&, std::__1::optional<WTF::ObjectIdentifier<WebCore::FrameIdentifierType> >, API::ContentWorld&, WTF::CompletionHandler<void (std::experimental::fundamentals_v3::expected<WTF::RefPtr<API::SerializedScriptValue, WTF::RawPtrTraits<API::SerializedScriptValue>, WTF::DefaultRefDerefTraits<API::SerializedScriptValue> >, WebCore::ExceptionDetails>&&)>&&)::$_26&&, unsigned long long, WTF::OptionSet<IPC::SendOption>)::'lambda'(IPC::Decoder*), void, IPC::Decoder*>::call(IPC::Decoder*) 0x000000018e9485f0 (WebKit + 0x004275f0) WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<std::__1::pair<WTF::CompletionHandler<void (IPC::Decoder*)>, unsigned long long> >&&, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Decoder*>::call(IPC::Decoder*) 0x000000018e80518c (WebKit + 0x002e418c) IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) 0x000000018e804914 (WebKit + 0x002e3914) IPC::Connection::dispatchIncomingMessages() 0x000000018bf1fe4c (JavaScriptCore + 0x000000000108ce4c) WTF::RunLoop::performWork() 0x000000018bf209c8 (JavaScriptCore + 0x000000000108d9c8) WTF::RunLoop::performWork(void*) 0x000000018073fee8 (CoreFoundation + 0x000b2ee8) __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 0x0000000180750018 (CoreFoundation + 0x000c3018) __CFRunLoopDoSource0 0x000000018069226c (CoreFoundation + 0x0000526c) __CFRunLoopDoSources0 0x00000001806978e4 (CoreFoundation + 0x0000a8e4) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x00000001a10d5984 (GraphicsServices + 0x00001984) GSEventRunModal 0x0000000182ea5c4c (UIKitCore + 0x004e5c4c) -[UIApplication _run] 0x0000000182c3f3cc (UIKitCore + 0x0027f3cc) UIApplicationMain 0x000000010098826c (Chrome -chrome_exe_main.mm:65) main 1857401 1 webkit-bug-importer 2022-04-01 14:36:54 -0700 <rdar://problem/91182464> 1857407 2 ysuzuki 2022-04-01 14:48:28 -0700 Could you paste the stacktrace of the other threads too? 1857927 3 ajuma 2022-04-04 10:35:35 -0700 Here are the other threads. Most of them seem uninteresting except thread 12 (which is detecting this hang and generating a report) and thread 17 (which is calling into AVAudioSession). Thread 1 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101704980 (Chrome -exception_handler.cc:492) google_breakpad::ExceptionHandler::WaitForMessage(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 2 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000180693764 (CoreFoundation + 0x00006764) __CFRunLoopServiceMachPort 0x0000000180697a6c (CoreFoundation + 0x0000aa6c) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x0000000181db3ea8 (Foundation + 0x00017ea8) -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 0x0000000181df2e8c (Foundation + 0x00056e8c) -[NSRunLoop(NSRunLoop) runUntilDate:] 0x0000000182e2509c (UIKitCore + 0x0046509c) -[UIEventFetcher threadMain] 0x0000000181e00d28 (Foundation + 0x00064d28) __NSThread__start__ 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 3 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000180693764 (CoreFoundation + 0x00006764) __CFRunLoopServiceMachPort 0x0000000180697a6c (CoreFoundation + 0x0000aa6c) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x0000000181db3ea8 (Foundation + 0x00017ea8) -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 0x0000000101243eac (Chrome -message_pump_mac.mm:656) base::MessagePumpNSRunLoop::DoRun(base::MessagePump::Delegate*) 0x0000000101242d1c (Chrome -message_pump_mac.mm:161) base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*) 0x00000001012111bc (Chrome -thread_controller_with_message_pump_impl.cc:468) base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool, base::TimeDelta) 0x00000001011ea800 (Chrome -run_loop.cc:140) base::RunLoop::Run(base::Location const&) 0x0000000101226780 (Chrome -thread.cc:334) base::Thread::Run(base::RunLoop*) 0x00000001012268fc (Chrome -thread.cc:405) base::Thread::ThreadMain() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 4 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000180693764 (CoreFoundation + 0x00006764) __CFRunLoopServiceMachPort 0x0000000180697a6c (CoreFoundation + 0x0000aa6c) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x0000000181db3ea8 (Foundation + 0x00017ea8) -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 0x0000000101243eac (Chrome -message_pump_mac.mm:656) base::MessagePumpNSRunLoop::DoRun(base::MessagePump::Delegate*) 0x0000000101242d1c (Chrome -message_pump_mac.mm:161) base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*) 0x00000001012111bc (Chrome -thread_controller_with_message_pump_impl.cc:468) base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool, base::TimeDelta) 0x00000001011ea800 (Chrome -run_loop.cc:140) base::RunLoop::Run(base::Location const&) 0x0000000101226780 (Chrome -thread.cc:334) base::Thread::Run(base::RunLoop*) 0x0000000101218c9c (Chrome -service_thread.cc:15) base::internal::ServiceThread::Run(base::RunLoop*) 0x00000001012268fc (Chrome -thread.cc:405) base::Thread::ThreadMain() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 5 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101223008 (Chrome -worker_thread.cc:371) base::internal::WorkerThread::RunWorker() 0x0000000101222b6c (Chrome -worker_thread.cc:267) base::internal::WorkerThread::RunPooledWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 6 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101223008 (Chrome -worker_thread.cc:371) base::internal::WorkerThread::RunWorker() 0x0000000101222ae8 (Chrome -worker_thread.cc:272) base::internal::WorkerThread::RunBackgroundPooledWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 7 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000180693764 (CoreFoundation + 0x00006764) __CFRunLoopServiceMachPort 0x0000000180697a6c (CoreFoundation + 0x0000aa6c) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x0000000181db3ea8 (Foundation + 0x00017ea8) -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 0x0000000101243eac (Chrome -message_pump_mac.mm:656) base::MessagePumpNSRunLoop::DoRun(base::MessagePump::Delegate*) 0x0000000101242d1c (Chrome -message_pump_mac.mm:161) base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*) 0x00000001012111bc (Chrome -thread_controller_with_message_pump_impl.cc:468) base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool, base::TimeDelta) 0x00000001011ea800 (Chrome -run_loop.cc:140) base::RunLoop::Run(base::Location const&) 0x0000000101226780 (Chrome -thread.cc:334) base::Thread::Run(base::RunLoop*) 0x0000000100c94f78 (Chrome -web_sub_thread.cc:117) web::WebSubThread::IOThreadRun(base::RunLoop*) 0x00000001012268fc (Chrome -thread.cc:405) base::Thread::ThreadMain() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 8 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101223008 (Chrome -worker_thread.cc:371) base::internal::WorkerThread::RunWorker() 0x0000000101222ae8 (Chrome -worker_thread.cc:272) base::internal::WorkerThread::RunBackgroundPooledWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 9 0x00000001badf0688 (libsystem_kernel.dylib + 0x00001688) __ulock_wait 0x00000001db779120 (libsystem_platform.dylib + 0x00008120) _os_unfair_lock_lock_slow 0x00000001db784e20 (libsystem_pthread.dylib + 0x00006e20) pthread_mach_thread_np 0x000000018bfc672c (JavaScriptCore + 0x000000000113372c) pas_thread_local_cache_for_all 0x000000018bfb41b4 (JavaScriptCore + 0x00000000011211b4) scavenger_thread_main 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 10 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101223008 (Chrome -worker_thread.cc:371) base::internal::WorkerThread::RunWorker() 0x0000000101222b98 (Chrome -worker_thread.cc:277) base::internal::WorkerThread::RunSharedWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 11 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101223008 (Chrome -worker_thread.cc:371) base::internal::WorkerThread::RunWorker() 0x0000000101222b6c (Chrome -worker_thread.cc:267) base::internal::WorkerThread::RunPooledWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 12 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x00000001badf65fc (libsystem_kernel.dylib + 0x000075fc) thread_get_state 0x000000016fff227c 0x00000001017076c8 (Chrome -minidump_generator.cc:974) google_breakpad::MinidumpGenerator::WriteThreadStream(unsigned int, MDRawThread*) 0x00000001017069a0 (Chrome -minidump_generator.cc:1021) google_breakpad::MinidumpGenerator::WriteThreadListStream(MDRawDirectory*) 0x0000000101706804 (Chrome -minidump_generator.cc:271) google_breakpad::MinidumpGenerator::Write(char const*) 0x0000000101702ca4 (Chrome -Breakpad.mm:580) Breakpad::GenerateReport(NSDictionary*) 0x0000000100d54108 (Chrome -main_thread_freeze_detector.mm:275) -[MainThreadFreezeDetector recordHangWithBreakpadRef:] 0x00000001803df090 (libdispatch.dylib + 0x00063090) _dispatch_call_block_and_release 0x00000001803e0090 (libdispatch.dylib + 0x00064090) _dispatch_client_callout 0x00000001803bb4a0 (libdispatch.dylib + 0x0003f4a0) _dispatch_lane_serial_drain$VARIANT$armv81 0x00000001803bbf40 (libdispatch.dylib + 0x0003ff40) _dispatch_lane_invoke$VARIANT$armv81 0x00000001803c58dc (libdispatch.dylib + 0x000498dc) _dispatch_workloop_worker_thread 0x00000001db77fe0c (libsystem_pthread.dylib + 0x00001e0c) _pthread_wqthread Thread 13 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101223008 (Chrome -worker_thread.cc:371) base::internal::WorkerThread::RunWorker() 0x0000000101222ae8 (Chrome -worker_thread.cc:272) base::internal::WorkerThread::RunBackgroundPooledWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 14 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000180693764 (CoreFoundation + 0x00006764) __CFRunLoopServiceMachPort 0x0000000180697a6c (CoreFoundation + 0x0000aa6c) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x0000000181db3ea8 (Foundation + 0x00017ea8) -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 0x0000000101243eac (Chrome -message_pump_mac.mm:656) base::MessagePumpNSRunLoop::DoRun(base::MessagePump::Delegate*) 0x0000000101242d1c (Chrome -message_pump_mac.mm:161) base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*) 0x00000001012111bc (Chrome -thread_controller_with_message_pump_impl.cc:468) base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool, base::TimeDelta) 0x00000001011ea800 (Chrome -run_loop.cc:140) base::RunLoop::Run(base::Location const&) 0x0000000101226780 (Chrome -thread.cc:334) base::Thread::Run(base::RunLoop*) 0x00000001012268fc (Chrome -thread.cc:405) base::Thread::ThreadMain() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 15 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000180693764 (CoreFoundation + 0x00006764) __CFRunLoopServiceMachPort 0x0000000180697a6c (CoreFoundation + 0x0000aa6c) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x00000001810afdc8 (CFNetwork + 0x00247dc8) _CFURLStorageSessionDisableCache 0x0000000181e00d28 (Foundation + 0x00064d28) __NSThread__start__ 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 16 0x00000001badf0014 (libsystem_kernel.dylib + 0x00001014) __workq_kernreturn 0x00000001db77fe58 (libsystem_pthread.dylib + 0x00001e58) _pthread_wqthread Thread 17 0x00000001db784e38 (libsystem_pthread.dylib + 0x00006e38) pthread_mach_thread_np 0x00000001db784e20 (libsystem_pthread.dylib + 0x00006e20) pthread_mach_thread_np 0x000000018943b958 (AudioSession + 0x0000f958) CADeprecated::CAPThread::SetPriority(_opaque_pthread_t*, unsigned int, bool) 0x000000018943b8b4 (AudioSession + 0x0000f8b4) ___ZN8avfaudio28GetNotificationRunLoopThreadEv_block_invoke 0x00000001803e0090 (libdispatch.dylib + 0x00064090) _dispatch_client_callout 0x00000001803b0bf0 (libdispatch.dylib + 0x00034bf0) _dispatch_once_callout 0x000000018943c840 (AudioSession + 0x00010840) avfaudio::GetNotificationRunLoopThread() 0x0000000189439498 (AudioSession + 0x0000d498) -[AVAudioSession initWithSessionType:identifier:] 0x0000000189431b0c (AudioSession + 0x00005b0c) -[AVAudioSession initWithSessionType:] 0x000000018943194c (AudioSession + 0x0000594c) +[AVAudioSession auxiliarySession] 0x000000018abc80a8 (CoreHaptics + 0x0000d0a8) -[CHHapticEngine initWithAudioSession:sessionIsShared:options:error:] 0x000000018abc3954 (CoreHaptics + 0x00008954) -[CHHapticEngine initWithAudioSession:sessionIsShared:error:] 0x0000000182f3ffc4 (UIKitCore + 0x0057ffc4) -[_UIFeedbackCoreHapticsEngine _internal_createCoreHapticsEngine] 0x0000000182e481d4 (UIKitCore + 0x004881d4) -[_UIFeedbackCoreHapticsHapticsOnlyEngine _internal_createCoreHapticsEngine] 0x0000000182f2f344 (UIKitCore + 0x0056f344) -[_UIFeedbackCoreHapticsEngine _internal_initializeCoreHapticsEngine] 0x0000000182f43370 (UIKitCore + 0x00583370) -[_UIFeedbackCoreHapticsEngine _internal_activateUnderlyingPlayerWithCompletion:] 0x0000000182fdb5e4 (UIKitCore + 0x0061b5e4) -[_UIFeedbackEngine _internal_activateEngine] 0x0000000182c29704 (UIKitCore + 0x00269704) -[_UIFeedbackEngine _internal_activate:andPerformWhenRunning:] 0x00000001803df090 (libdispatch.dylib + 0x00063090) _dispatch_call_block_and_release 0x00000001803e0090 (libdispatch.dylib + 0x00064090) _dispatch_client_callout 0x00000001803bb4a0 (libdispatch.dylib + 0x0003f4a0) _dispatch_lane_serial_drain$VARIANT$armv81 0x00000001803bbf40 (libdispatch.dylib + 0x0003ff40) _dispatch_lane_invoke$VARIANT$armv81 0x00000001803c58dc (libdispatch.dylib + 0x000498dc) _dispatch_workloop_worker_thread 0x00000001db77fe0c (libsystem_pthread.dylib + 0x00001e0c) _pthread_wqthread Thread 18 0x00000001badf0014 (libsystem_kernel.dylib + 0x00001014) __workq_kernreturn 0x00000001db77fe58 (libsystem_pthread.dylib + 0x00001e58) _pthread_wqthread Thread 19 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101223008 (Chrome -worker_thread.cc:371) base::internal::WorkerThread::RunWorker() 0x0000000101222b6c (Chrome -worker_thread.cc:267) base::internal::WorkerThread::RunPooledWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 20 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000101245a0c (Chrome -waitable_event_mac.cc:170) base::WaitableEvent::TimedWait(base::TimeDelta const&) 0x0000000101222568 (Chrome -worker_thread.cc:75) base::internal::WorkerThread::Delegate::WaitForWork(base::WaitableEvent*) 0x0000000101222d04 (Chrome -worker_thread.cc:346) base::internal::WorkerThread::RunWorker() 0x0000000101222b6c (Chrome -worker_thread.cc:267) base::internal::WorkerThread::RunPooledWorker() 0x000000010123d294 (Chrome -platform_thread_posix.cc:99) base::(anonymous namespace)::ThreadFunc(void*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start Thread 21 0x00000001badefaac (libsystem_kernel.dylib + 0x00000aac) mach_msg_trap 0x00000001badf0078 (libsystem_kernel.dylib + 0x00001078) mach_msg 0x0000000180693764 (CoreFoundation + 0x00006764) __CFRunLoopServiceMachPort 0x0000000180697a6c (CoreFoundation + 0x0000aa6c) __CFRunLoopRun 0x00000001806aac2c (CoreFoundation + 0x0001dc2c) CFRunLoopRunSpecific 0x0000000189432474 (AudioSession + 0x00006474) CADeprecated::GenericRunLoopThread::Entry(void*) 0x000000018943b7c4 (AudioSession + 0x0000f7c4) CADeprecated::CAPThread::Entry(CADeprecated::CAPThread*) 0x00000001db781344 (libsystem_pthread.dylib + 0x00003344) _pthread_start 1857937 4 ysuzuki 2022-04-04 10:52:22 -0700 @Ali Thank you so much! This is dupe of bug 236798 and fixed in ToT :) *** This bug has been marked as a duplicate of bug 236798 ***