Watchdog killed the app because PrintKit is performing XPC operations on the main thread,see the call stacks below. __dispatch_sema4_timedwait __dispatch_semaphore_wait_slow +[_PK_OneShotXPC withTimeout:doSyncronousOneShot:] __pk_mdns_resolveSynchronous -[PKPrinter(PKPrinterPrivate) resolveWithTimeout:] -[PKPrinter printerURL] -[UIPrinter _initWithPrinter:] -[UIPrinterSelectionOption setPrinter:] -[UIPrinterBrowserViewController tableView:didSelectRowAtIndexPath:] -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:isCellMultiSelect:deselectPrevious:performCustomSelectionAction:] -[UITableView _userSelectRowAtPendingSelectionIndexPath:] -[_UIAfterCACommitBlock run] -[_UIAfterCACommitQueue flush] __runAfterCACommitDeferredBlocks __cleanUpAfterCAFlushAndRunDeferredBlocks __UIApplicationFlushCATransaction __UIUpdateSequenceRun _schedulerStepScheduledMainSection _runloopSourceCallback ___CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ ___CFRunLoopDoSource0 ___CFRunLoopDoSources0 ___CFRunLoopRun _CFRunLoopRunSpecific _GSEventRunModal -[UIApplication _run] _UIApplicationMain main main.m:26 start

Hi,there's a weird crash in our app,I put the crash log below.Hope you folks could offer some solutions. Secondary Crashed: EXC_BREAKPOINT： undefined 0 CoreFoundation _CFGetTypeID 1 CoreFoundation __flattenPlist 2 CoreFoundation __flattenPlist 3 CoreFoundation __flattenPlist 4 CoreFoundation ___CFBinaryPlistWriteOrPresize 5 CoreFoundation _CFPropertyListWrite 6 CoreFoundation _CFPropertyListCreateData 7 CFNetwork _CFHTTPCookieGetExpirationTime 8 libdispatch.dylib __dispatch_block_async_invoke2 9 libdispatch.dylib __dispatch_client_callout 10 libdispatch.dylib __dispatch_lane_serial_drain 11 libdispatch.dylib __dispatch_lane_invoke 12 libdispatch.dylib __dispatch_workloop_worker_thread 13 libsystem_pthread.dylib libsystem_pthread.dylib#_pthread_wqthread

Our app encountered a new crash since beta5(23A5308g) released last week,and it seems the crash is not solved yet in beta6(23A5318c).The crash stack below `-[UIView _backing_setPosition:] -[UIView setCenter:] -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] ___54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] -[_UIEditMenuContentPresentation _displayMenu:reason:] -[_UIEditMenuContentPresentation displayMenu:configuration:] ___58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke ___80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke ___109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke ___107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>::operator()(WebKit::DocumentEditingContext&&) WTF::Detail::CallableWrapper<IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)> >(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::{lambda(IPC::Connection*, IPC::Decoder*)#1}, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRefIPC::Encoder&&, WTF::OptionSetIPC::SendOption, std::__1::optionalIPC::ConnectionAsyncReplyHandler, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) IPC::Connection::dispatchMessage(WTF::UniqueRefIPC::Decoder) IPC::Connection::dispatchIncomingMessages() WTF::RunLoop::performWork() WTF::RunLoop::performWork(void*) _CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION ___CFRunLoopDoSource0 ___CFRunLoopDoSources0 ___CFRunLoopRun __CFRunLoopRunSpecificWithOptions _GSEventRunModal -[UIApplication _run] _UIApplicationMain main main.m start