After signing in (may be side-effect of  issue 714968 ):


[5191:5191:0424/185012.003675:FATAL:known_user.cc(420)] Check failed: false. Trying to change device ID for known user.
#0 0x6497440df24d base::debug::StackTrace::StackTrace()
#1 0x6497440ddf1c base::debug::StackTrace::StackTrace()
#2 0x64974412bc2f logging::LogMessage::~LogMessage()
#3 0x64974627d9be user_manager::known_user::SetDeviceId()
#4 0x6497416cfb7f chromeos::UserSessionManager::StartSession()
#5 0x649741667134 chromeos::ExistingUserController::OnAuthSuccess()
#6 0x649745e7c077 chromeos::LoginPerformer::OnAuthSuccess()
#7 0x649745e66f71 chromeos::CryptohomeAuthenticator::OnAuthSuccess()
#8 0x649745e70267 _ZN4base8internal13FunctorTraitsIMN8chromeos23CryptohomeAuthenticatorEFvvEvE6InvokeIRK13scoped_refptrIS3_EJEEEvS5_OT_DpOT0_
#9 0x649745e701b1 _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIRKMN8chromeos23CryptohomeAuthenticatorEFvvEJRK13scoped_refptrIS5_EEEEvOT_DpOT0_
#10 0x649745e70152 _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos23CryptohomeAuthenticatorEFvvEJ13scoped_refptrIS4_EEEEFvvEE7RunImplIRKS6_RKSt5tupleIJS8_EEJLm0EEEEvOT_OT0_NS_13IndexSequenceIJXspT1_EEEE
#11 0x649745e7009c _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos23CryptohomeAuthenticatorEFvvEJ13scoped_refptrIS4_EEEEFvvEE3RunEPNS0_13BindStateBaseE
#12 0x64973ebb3329 _ZNO4base8CallbackIFvvELNS_8internal8CopyModeE0ELNS2_10RepeatModeE0EE3RunEv
#13 0x649744335b12 base::debug::TaskAnnotator::RunTask()
#14 0x6497441496ad base::MessageLoop::RunTask()
#15 0x649744149954 base::MessageLoop::DeferOrRunPendingTask()
#16 0x649744149c80 base::MessageLoop::DoWork()
#17 0x6497441661ae base::MessagePumpLibevent::Run()
#18 0x649744149207 base::MessageLoop::RunHandler()
#19 0x6497441e0c9a base::RunLoop::Run()
#20 0x64974334192e ChromeBrowserMainParts::MainMessageLoopRun()
#21 0x64973f75c4e8 content::BrowserMainLoop::RunMainMessageLoopParts()
#22 0x64973f768b76 content::BrowserMainRunnerImpl::Run()
#23 0x64973f7559a2 content::BrowserMain()
#24 0x649743253fe6 content::RunNamedProcessTypeMain()
#25 0x6497432563dd content::ContentMainRunnerImpl::Run()
#26 0x64974325341a content::ContentServiceManagerMainDelegate::Run()
#27 0x6497473af088 service_manager::Main()
#28 0x6497432539f3 content::ContentMain()
#29 0x64973e20f674 ChromeMain
#30 0x64973e20f502 main
#31 0x7f9fcef59816 __libc_start_main
#32 0x64973e20f399 _start