launch client, wait for site to load, then kill client. Engine has check failure.

[11682:11682:0603/114408:FATAL:lock_impl_posix.cc(46)] Check failed: rv == 0 (22 vs. 0). Invalid argument
#0 0x7f9cf487869e base::debug::StackTrace::StackTrace()
#1 0x7f9cf4898f5b logging::LogMessage::~LogMessage()
#2 0x7f9cf48e8b98 base::internal::LockImpl::Lock()
#3 0x7f9cf4906903 base::ThreadCheckerImpl::CalledOnValidThread()
#4 0x7f9cf48e6aac base::SupportsUserData::GetUserData()
#5 0x7f9cf3a6db9f content::SSLManager::~SSLManager()
#6 0x7f9cf37c9ab0 content::NavigationControllerImpl::~NavigationControllerImpl()
#7 0x7f9cf3a9878f content::WebContentsImpl::~WebContentsImpl()
#8 0x7f9cf3a98a09 content::WebContentsImpl::~WebContentsImpl()
#9 0x0000004bb31b blimp::engine::BlimpEngineSession::~BlimpEngineSession()
#10 0x0000004bb5b9 blimp::engine::BlimpEngineSession::~BlimpEngineSession()
#11 0x7f9cf36fb32e content::BrowserMainLoop::ShutdownThreadsAndCleanUp()
#12 0x7f9cf36fddce content::BrowserMainRunnerImpl::Shutdown()
#13 0x7f9cf36f6857 content::BrowserMain()
#14 0x7f9cf40a6c6b content::RunNamedProcessTypeMain()
#15 0x7f9cf40a76e3 content::ContentMainRunnerImpl::Run()
#16 0x7f9cf40a5fb0 content::ContentMain()
#17 0x00000041b14b main
#18 0x7f9cf0debf45 __libc_start_main
#19 0x00000041b035 <unknown>