Shortly after launch on device I got:

[0912/075431.315389:FATAL:tab_usage_recorder.mm(293)] Check failed: !WebStateAlreadyEvicted(terminated_web_state). 


#0  0x00000001039ab244 in base::debug::BreakDebugger() at base/debug/debugger_posix.cc:263
#1  0x00000001036fd744 in logging::LogMessage::~LogMessage() at base/logging.cc:865
#2  0x00000001036fa3b8 in logging::LogMessage::~LogMessage() at base/logging.cc:593
#3  0x0000000102574810 in TabUsageRecorder::RendererTerminated(web::WebState*, bool, bool) at ios/chrome/browser/metrics/tab_usage_recorder.mm:293
#4  0x00000001025755cc in TabUsageRecorder::RenderProcessGone(web::WebState*) at ios/chrome/browser/metrics/tab_usage_recorder.mm:464
#5  0x0000000101f5efc8 in web::WebStateImpl::OnRenderProcessGone() at ios/web/web_state/web_state_impl.mm:198
#6  0x0000000101e8725c in ::-[CRWWebController webViewWebProcessDidCrash]() at ios/web/web_state/ui/crw_web_controller.mm:4022
#7  0x0000000101e939a0 in ::-[CRWWebController webViewWebContentProcessDidTerminate:](WKWebView *) at ios/web/web_state/ui/crw_web_controller.mm:5050