[27811:27811:1026/123635.858462:FATAL:message_center_impl.cc(166)] Check failed: !iterating_. 
#0 0x7f0713c8484c base::debug::StackTrace::StackTrace()
#1 0x7f0713caaebc logging::LogMessage::~LogMessage()
#2 0x7f070e8cd223 message_center::MessageCenterImpl::SetVisibility()
#3 0x7f070e8d2257 message_center::MessageCenterTray::OnNotificationSettingsClicked()
#4 0x7f070e8d0084 message_center::MessageCenterImpl::ClickOnSettingsButton()
#5 0x7f070e8ec0b3 message_center::ToastContentsView::ClickOnSettingsButton()
#6 0x7f070eba9ecd views::Button::OnMouseReleased()
#7 0x7f070eb986e2 views::InkDropHostView::OnMouseEvent()
#8 0x7f070ff36972 ui::ScopedTargetHandler::OnEvent()
#9 0x7f070ff33f6e ui::EventDispatcher::ProcessEvent()
#10 0x7f070ff33d09 ui::EventDispatcherDelegate::DispatchEvent()
#11 0x7f070ec1a209 views::internal::RootView::OnMouseReleased()
#12 0x7f070ec1f9e8 views::Widget::OnMouseEvent()
#13 0x7f070ec3ac06 views::NativeWidgetAura::OnMouseEvent()
#14 0x7f070ff33f6e ui::EventDispatcher::ProcessEvent()
#15 0x7f070ff33d09 ui::EventDispatcherDelegate::DispatchEvent()
#16 0x7f070ff3545b ui::EventProcessor::OnEventFromSource()
#17 0x7f070ff35928 ui::EventSource::SendEventToSink()
#18 0x7f070e5f49fe ash::AshWindowTreeHostPlatform::DispatchEvent()
#19 0x7f070ff3755f ui::DispatchEventFromNativeUiEvent()
#20 0x7f07069c8c31 ui::X11WindowOzone::DispatchEvent()
#21 0x7f0712fe0496 ui::PlatformEventSource::DispatchEvent()
#22 0x7f07069fdc94 ui::X11EventSourceLibevent::ProcessXEvent()
#23 0x7f07069f9553 ui::X11EventSource::ExtractCookieDataDispatchEvent()
#24 0x7f07069f94fd ui::X11EventSource::DispatchXEvents()
#25 0x7f0713cbc613 base::MessagePumpLibevent::OnLibeventNotification()
#26 0x7f0713d80d2d event_base_loop
#27 0x7f0713cbc954 base::MessagePumpLibevent::Run()
#28 0x7f0713cb98b2 base::MessageLoop::Run()
#29 0x7f0713ceda5f base::RunLoop::Run()
#30 0x0070a1e8e12a <unknown>
#31 0x7f0711184ad7 content::BrowserMainLoop::RunMainMessageLoopParts()
#32 0x7f0711187b66 content::BrowserMainRunnerImpl::Run()
#33 0x7f0711180aff content::BrowserMain()
#34 0x7f0711ad8291 content::ContentMainRunnerImpl::Run()
#35 0x7f07141d340a service_manager::Main()
#36 0x7f0711ad6c74 content::ContentMain()
#37 0x0070a144ea5b <unknown>
#38 0x7f0707b42f45 __libc_start_main
#39 0x0070a144e882 <unknown>