I have a CL that regularly fails the CQ for telemetry_perf_unittests on windows:

https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_ng/builds/497757

I have no idea what's going wrong. Here are the logs:

"""
[24/26] benchmarks.benchmark_smoke_unittest.BenchmarkSmokeTest.tab_switching.typical_25 failed unexpectedly 73.4360s:
  [ RUN      ] multitab:misc:typical24@{'case': 'multitab', 'group': 'misc'}
  Traceback (most recent call last):
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py", line 104, in _RunStoryAndProcessErrorIfNeeded
      state.RunStory(results)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\page\shared_page_state.py", line 314, in RunStory
      self._current_page.Run(self)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\page\__init__.py", line 108, in Run
      shared_state.page_test.RunNavigateSteps(self, current_tab)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\page\legacy_page_test.py", line 177, in RunNavigateSteps
      page.RunNavigateSteps(action_runner)
    File "e:\b\swarm_slave\w\ir\tools\perf\page_sets\system_health\multi_tab_stories.py", line 29, in RunNavigateSteps
      new_tab = tabs.New()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\browser\tab_list.py", line 9, in New
      return self._tab_list_backend.New(timeout)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome\tab_list_backend.py", line 43, in New
      return self.GetBackendFromContextId(context_id)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend_list.py", line 75, in GetBackendFromContextId
      context_id)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\devtools_client_backend.py", line 474, in GetInspectorBackend
      self._app_backend.app, self._devtools_client, context)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py", line 72, in __init__
      self._websocket, timeout=timeout)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_page.py", line 26, in __init__
      self._EnablePageNotifications(timeout=timeout)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_page.py", line 80, in _EnablePageNotifications
      res = self._inspector_websocket.SyncRequest(request, timeout)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py", line 110, in SyncRequest
      res = self._Receive(timeout)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py", line 149, in _Receive
      data = self._socket.recv()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 293, in recv
      opcode, data = self.recv_data()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 310, in recv_data
      opcode, frame = self.recv_data_frame(control_frame)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 323, in recv_data_frame
      frame = self.recv_frame()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 357, in recv_frame
      return self.frame_buffer.recv_frame()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py", line 336, in recv_frame
      self.recv_header()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py", line 286, in recv_header
      header = self.recv_strict(2)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py", line 371, in recv_strict
      bytes_ = self.recv(min(16384, shortage))
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 427, in _recv
      return recv(self.sock, bufsize)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_socket.py", line 80, in recv
      bytes_ = sock.recv(bufsize)
  error: [Errno 10054] An existing connection was forcibly closed by the remote host
  
  [  FAILED  ] multitab:misc:typical24@{'case': 'multitab', 'group': 'misc'} (63434 ms)
  [  PASSED  ] 0 tests.
  [  FAILED  ] 1 test, listed below:
  [  FAILED  ]  multitab:misc:typical24@{'case': 'multitab', 'group': 'misc'}
  
  1 FAILED TEST
  
  No usb serial port discovered. Available ones are: [('COM1', 'Communications Port (COM1)', 'ACPI\\PNP0501\\1'), ('COM2', 'Communications Port (COM2)', 'ACPI\\PNP0501\\2')]
  BattOr power monitor is not connected.
  Chrome build location for win_AMD64 not found. Browser will be run without Flash.
  Chrome build location for win_AMD64 not found. Browser will be run without Flash.
  Chrome build location for win_AMD64 not found. Browser will be run without Flash.
  Downloading WPR archives. This can take a long time.
  All WPR archives are downloaded, took 7.06700015068 seconds.
  Chrome build location for win_AMD64 not found. Browser will be run without Flash.
  Tsproxy commandline: ['e:\\b\\depot_tools\\python276_bin\\python.exe', 'e:\\b\\swarm_slave\\w\\ir\\third_party\\catapult\\telemetry\\third_party\\tsproxy\\tsproxy.py', '--port=0', '--desthost=127.0.0.1']
  TsProxy port: 62624
  Starting Web-Page-Replay: ['e:\\b\\depot_tools\\python276_bin\\python.exe', 'e:\\b\\swarm_slave\\w\\ir\\third_party\\catapult\\telemetry\\third_party\\web-page-replay\\replay.py', '--host=127.0.0.1', '--port=0', '--ssl_port=0', '--no-dns_forwarding', '--use_closest_match', '--log_level=info', u'e:\\b\\swarm_slave\\w\\ir\\tools\\perf\\page_sets\\data\\system_health_desktop_049.wpr']
  WPR ports: {'http': 62626, 'https': 62627}
  Issuing command to ts_proxy_server: set mapports 443:62627,*:62626
  Requested remote debugging port: 0
  Starting Chrome ['e:\\b\\swarm_slave\\w\\ir\\out\\Release\\chrome.exe', u'--disable-features=DocumentWriteEvaluator<DisallowFetchForDocWrittenScriptsInMainFrame,LazyParseCSS<LazyParseCSS,TranslateRankerEnforcement<TranslateRankerModel', u'--force-fieldtrials=AlternateComponentUrls/AlternateComponentUrls/AutofillClassifier/Enabled/AutofillCreditCardSigninPromo/EnabledThree/AutofillFieldMetadata/Enabled/AutofillProfileCleanup/Enabled/AutofillProfileOrderByFrecency/EnabledLimitTo3/AutomaticTabDiscarding/Enabled_Once_10-gen2/BackgroundVideoOptimizations/BackgroundOptimizationEnabled1sOrLessMediaSource/BrowserBlacklist/Enabled/BrowserScheduler/RedirectWithDefaultInitParams/CSSExternalScanner/Enabled_ScanAndPreload/CaptivePortalCertificateList/Enabled/CaptivePortalInterstitial/Enabled/CheckerImaging/CheckerImaging/ChildAccountDetection/Disabled/ChromeDashboard/Enabled/ChromotingQUIC/Enabled/DataReductionProxyUseQuic/Enabled/DefaultBrowserInfobar/SettingsTextNotNow/DefaultBrowserPromptStyle/ColoredLogoOnWhiteBackground/DefaultEnableGpuRasterization/DefaultEnableGpuRasterization/DelayNavigation/DelayNavigation/DesktopIOSPromotion/SavePasswordsBubblePromotionV1/DirectCompositionOverlays/DirectCompositionOverlays/DisallowFetchForDocWrittenScriptsInMainFrame/DocumentWriteScriptBlockGroup_20161208_Launch/EnableAppContainer/Enabled/EnableGoogleCachedCopyTextExperiment/Button/EnableMediaRemoting/Enabled/EnableMediaRouter/Enabled/EnableMediaRouterWithCastExtension/Enabled/EnableSessionCrashedBubbleUI/Enabled/EnableSyncClientToServerCompression/Enabled/EnableSyncUSSDeviceInfo/Enabled/ExpectCTDynamic/DynamicExpectCTEnabled/ExpectCTReporting/ExpectCTReportingEnabled/ExtensionContentVerification/Enforce/ExtensionInstallVerification/Enforce/FasterLocationReload/Enabled/GoogleBrandedContextMenu/branded/GoogleNow/Enable/GpuScheduler/Enabled/Html5ByDefault/Enabled/HttpFormWarning/Enabled/IdleTimeSpellChecking/Enabled/ImprovedRecoveryComponent/ImprovedRecoveryComponent/IncludeBetaForumMenuItem/Enabled/IncognitoWindowPromo/Enabled/InstanceID/Enabled/IntelligentSessionRestore/Enabled/LazyParseCSS/Control/LoadingWithMojo/Enabled/MaterialDesignDownloads/Enabled/MaterialDesignUserManager/Enabled/MediaFoundationH264Encoding/Enabled/MidiManagerDynamicInstantiation/Enabled/MojoChannel/Enabled/NTPCaptureThumbnail/Enabled/NTPTilesInInstantService/Enabled/NetDelayableH2AndQuicRequests/Enabled/NetworkQualityEstimator/Enabled/NetworkSchedulerYielding/Enabled/NewProfileManagement/Enabled/NewTabInProductHelp/Enabled_1/NoStatePrefetchValidation/PrerenderDisabled_R2/OfferUploadCreditCards/Enabled/OneGoogleBarOnLocalNtp/Enabled/OutOfProcessPac/Enabled/PageRevisitInstrumentation/Enabled/PassiveDocumentEventListeners/Enabled/PassiveEventListenersDueToFling/Enabled/PasswordBranding/SmartLockBrandingSavePromptOnly/PasswordGeneration/Disabled/PasswordMetadataFilling/Enabled/PasswordProtectionPasswordFieldOnFocusPing/SBEROnlyNoIncognito2/PasswordProtectionProtectedPasswordEntryPing/AllPopulation/PasswordSeparatedSigninFlow/Enabled/PasswordSmartBubble/3-Times/PermissionPromptUIViews/BlockPromptsEnabled/PersistentHistograms/EnabledOnDisk5/PreconnectMore/Enabled/PrintScaling/Enabled/QUIC/Enabled/RafAlignedMouseInput/Enabled/RafAlignedTouchInput/Enabled/RefreshTokenDeviceId/Enabled/ReportCertificateErrors/ShowAndPossiblySend/ReportingAPI/ReportingEnabled/SRTPromptFieldTrial/On/SSLCommonNameMismatchHandling/Enabled/SafeBrowsingIncidentReportingService/Enabled/SafeBrowsingIncidentReportingServiceFeatures/WithSuspiciousModuleReporting/SafeBrowsingScoutTransitionStudy/CanShowScoutOptInGroup2/SafeBrowsingThreatDomDetailsTagAttributes/AdIdentifiers/SafeBrowsingV4LocalDatabaseManagerEnabled/V4Only2/SaveAsMenuText/download/SchedulerExpensiveTaskBlocking/Enabled/SdchPersistence/Enabled/SecurityChip/Enabled/ServiceWorkerNavigationPreload/Enabled/SettingsEnforcement/enforce_always_with_extensions_and_dse/SettingsResetPrompt/Enabled/SignInPasswordPromo/Enable3/SocketReadIfReady/Enabled/SpeculativeLaunchServiceWorker/Enabled/StrictSecureCookies/Enabled/SubresourceFilter/EnabledForPhishingSites/SuperfishInterstitial/Enabled/SyncUSSAutocomplete/Enabled/SyncUserEvents/Enabled/TLS13Variant/DraftEnabled/TabSyncByRecency/Enabled/TokenBinding/TokenBinding/TranslateRankerModel/QueryExperiment2/TranslateServerStudy/SmartRendering/TranslateUI2016Q2/TranslateUI2016Q2OnGroup/TriggeredResetFieldTrial/On/UKM/Enabled/V8AsmJSToWasm/AsmJsToWebAssembly/V8CacheStrategiesForCacheStorage/default/V8Ignition/Future/VideoCaptureService/Enabled/VsyncAlignedInput/Enable/WebBluetoothBlocklist/TestGroup/WebFontsInterventionV2/Enabled-slow2g/WebRTC-EnableWebRtcEcdsa/Enabled/WebRTC-H264WithOpenH264FFmpeg/Enabled/WebRTC-LocalIPPermissionCheck/Enabled/use-new-media-cache/Enabled', u'--enable-features=AlternateComponentUrls<AlternateComponentUrls,AutofillCreditCardSigninPromo<AutofillCreditCardSigninPromo,AutofillProfileCleanup<AutofillProfileCleanup,AutomaticTabDiscarding<AutomaticTabDiscarding,BackgroundVideoTrackOptimization<BackgroundVideoOptimizations,CaptivePortalCertificateList<CaptivePortalCertificateList,CheckerImaging<CheckerImaging,DefaultEnableGpuRasterization<DefaultEnableGpuRasterization,DelayNavigation<DelayNavigation,DesktopIOSPromotion<DesktopIOSPromotion,DirectCompositionOverlays<DirectCompositionOverlays,MediaRemoting<EnableMediaRemoting,EnableSyncClientToServerCompression<EnableSyncClientToServerCompression,EnableSyncUSSDeviceInfo<EnableSyncUSSDeviceInfo,DynamicExpectCT<ExpectCTDynamic,ExpectCTReporting<ExpectCTReporting,FasterLocationReload<FasterLocationReload,GpuScheduler<GpuScheduler,PreferHtmlOverPlugins<Html5ByDefault,HttpFormWarning<HttpFormWarning,IdleTimeSpellChecking<IdleTimeSpellChecking,ImprovedRecoveryComponent<ImprovedRecoveryComponent,IncludeBetaForumMenuItem<IncludeBetaForumMenuItem,IPH_IncognitoWindow<IncognitoWindowPromo,LoadingWithMojo<LoadingWithMojo,MaterialDesignUserManager<MaterialDesignUserManager,MediaFoundationH264Encoding<MediaFoundationH264Encoding,MidiManagerDynamicInstantiation<MidiManagerDynamicInstantiation,CaptureThumbnailDependingOnTransitionType<NTPCaptureThumbnail,CaptureThumbnailOnNavigatingAway<NTPCaptureThumbnail,NTPTilesInInstantService<NTPTilesInInstantService,PrioritySupportedRequestsDelayable<NetDelayableH2AndQuicRequests,NetworkSchedulerYielding<NetworkSchedulerYielding,IPH_NewTab<NewTabInProductHelp,NoStatePrefetch<NoStatePrefetchValidation,OneGoogleBarOnLocalNtp<OneGoogleBarOnLocalNtp,PassiveDocumentEventListeners<PassiveDocumentEventListeners,PassiveEventListenersDueToFling<PassiveEventListenersDueToFling,PasswordMetadataFilling<PasswordMetadataFilling,PasswordFieldOnFocusPinging<PasswordProtectionPasswordFieldOnFocusPing,ProtectedPasswordEntryPinging<PasswordProtectionProtectedPasswordEntryPing,UsePasswordSeparatedSigninFlow<PasswordSeparatedSigninFlow,BlockPromptsIfDismissedOften<PermissionPromptUIViews,PersistentHistograms<PersistentHistograms,PreconnectMore<PreconnectMore,PrintScaling<PrintScaling,RafAlignedMouseInput<RafAlignedMouseInput,RafAlignedTouchInput<RafAlignedTouchInput,Reporting<ReportingAPI,IncidentReportingDisableUpload<SafeBrowsingIncidentReportingService,IncidentReportingModuleLoadAnalysis<SafeBrowsingIncidentReportingServiceFeatures,IncidentReportingSuspiciousModuleReporting<SafeBrowsingIncidentReportingServiceFeatures,CanShowScoutOptIn<SafeBrowsingScoutTransitionStudy,ThreatDomDetailsTagAttributes<SafeBrowsingThreatDomDetailsTagAttributes,SafeBrowsingV4LocalDatabaseManagerEnabled<SafeBrowsingV4LocalDatabaseManagerEnabled,SafeBrowsingV4OnlyEnabled<SafeBrowsingV4LocalDatabaseManagerEnabled,SecurityChip<SecurityChip,ServiceWorkerNavigationPreload<ServiceWorkerNavigationPreload,SettingsResetPrompt<SettingsResetPrompt,SocketReadIfReady<SocketReadIfReady,SpeculativeLaunchServiceWorker<SpeculativeLaunchServiceWorker,SubresourceFilter<SubresourceFilter,SuperfishInterstitial<SuperfishInterstitial,SyncUSSAutocomplete<SyncUSSAutocomplete,SyncUserEvents<SyncUserEvents,token-binding<TokenBinding,TranslateRankerQuery<TranslateRankerModel,TranslateUI2016Q2<TranslateUI2016Q2,Ukm<UKM,AsmJsToWebAssembly<V8AsmJSToWasm,V8Future<V8Ignition,MojoVideoCapture<VideoCaptureService,RequestUnbufferedDispatch<VsyncAlignedInput,VsyncAlignedInput<VsyncAlignedInput,WebRTC-EnableWebRtcEcdsa<WebRTC-EnableWebRtcEcdsa,WebRTC-H264WithOpenH264FFmpeg<WebRTC-H264WithOpenH264FFmpeg,use-new-media-cache<use-new-media-cache', u'--force-fieldtrial-params=AutofillCreditCardSigninPromo.EnabledThree:impression_limit/3,AutofillProfileOrderByFrecency.EnabledLimitTo3:limit/3,AutomaticTabDiscarding.Enabled_Once_10-gen2:MinimumProtectionTime/600,BackgroundVideoOptimizations.BackgroundOptimizationEnabled1sOrLessMediaSource:max_keyframe_distance_media_source_ms/1000/max_keyframe_distance_ms/0,CSSExternalScanner.Enabled_ScanAndPreload:cssExternalScannerNoPreload/false/cssExternalScannerPreload/true,DataReductionProxyUseQuic.Enabled:enable_warmup/true,DefaultBrowserPromptStyle.ColoredLogoOnWhiteBackground:IconColor/Colored/InfoBarType/PageAction,DelayNavigation.DelayNavigation:delay_millis/4/delay_probability/0%2E5/randomize_delay/true,DesktopIOSPromotion.SavePasswordsBubblePromotionV1:body_text_id/0/entry_point/SavePasswordsBubblePromotion/max_views/3/promo_variation_id/1/sms_id/19001508/title_text_id/0,DisallowFetchForDocWrittenScriptsInMainFrame.DocumentWriteScriptBlockGroup_20161208_Launch:disallowFetchForDocWrittenScriptsInMainFrame/false/disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections/true,Html5ByDefault.Enabled:engagement_threshold_for_flash/32,IncognitoWindowPromo.Enabled:availability/any/event_history_deleted/name%3Ahistory_deleted;comparator%3A>=1;window%3A3650;storage%3A3650/event_incognito_window_opened/name%3Aincognito_window_opened;comparator%3A==0;window%3A3650;storage%3A3650/event_session_time/name%3Asession_time;comparator%3A>=1;window%3A3650;storage%3A3650/event_trigger/name%3Aincognito_window_trigger;comparator%3Aany;window%3A3650;storage%3A3650/event_used/name%3Aincognito_window_clicked;comparator%3Aany;window%3A3650;storage%3A3650/session_rate/<=3,NetworkQualityEstimator.Enabled:2G%2EDefaultMedianKbps/81/2G%2EDefaultMedianRTTMsec/1337/3G%2EDefaultMedianKbps/658/3G%2EDefaultMedianRTTMsec/297/4G%2EDefaultMedianKbps/1756/4G%2EDefaultMedianRTTMsec/159/Bluetooth%2EDefaultMedianKbps/449/Bluetooth%2EDefaultMedianRTTMsec/135/Ethernet%2EDefaultMedianKbps/3263/Ethernet%2EDefaultMedianRTTMsec/106/HalfLifeSeconds/60/None%2EDefaultMedianKbps/567/None%2EDefaultMedianRTTMsec/272/Slow2G%2EThresholdMedianHttpRTTMsec/2000/Unknown%2EDefaultMedianKbps/1916/Unknown%2EDefaultMedianRTTMsec/121/WiFi%2EDefaultMedianKbps/2736/WiFi%2EDefaultMedianRTTMsec/168/correlation_logging_probability/0%2E001,NewTabInProductHelp.Enabled_1:availability/any/event_new_tab_opened/name%3Anew_tab_opened;comparator%3A==0;window%3A3650;storage%3A3650/event_omnibox_used/name%3Aomnibox_used;comparator%3A>=1;window%3A3650;storage%3A3650/event_session_time/name%3Asession_time;comparator%3A>=1;window%3A3650;storage%3A3650/event_trigger/name%3Anew_tab_trigger;comparator%3Aany;window%3A3650;storage%3A3650/event_used/name%3Anew_tab_clicked;comparator%3Aany;window%3A3650;storage%3A3650/session_rate/<=3/x_promo_string/0,NoStatePrefetchValidation.PrerenderDisabled_R2:instant_mode/simple_load/mode/simple_load/omnibox_mode/simple_load,PasswordProtectionPasswordFieldOnFocusPing.SBEROnlyNoIncognito2:extended_reporting/true/history_sync/false/incognito/false,PasswordProtectionProtectedPasswordEntryPing.AllPopulation:all_population/true/incognito/true,PasswordSmartBubble.3-Times:dismissal_count/3,PersistentHistograms.EnabledOnDisk5:send_unreported_metrics/yes/storage/MappedFile,ReportCertificateErrors.ShowAndPossiblySend:sendingThreshold/1%2E0,SafeBrowsingIncidentReportingService.Enabled:collect_reg_data/true,SafeBrowsingThreatDomDetailsTagAttributes.AdIdentifiers:tag_attribute_csv/div%2Cdata-google-query-id%2Cdiv%2Cid%2Ciframe%2Cid,SecurityChip.Enabled:animation/animate-nonsecure-only/visibility/show-all,SettingsResetPrompt.Enabled:delay_before_prompt_seconds/1/domain_hashes/{"c027a731da03fee479b2ba00b3afe74b3fd9190f0622755db8ffa504efbde66e"%3A"3"}/prompt_wave/20170101/time_between_prompts_seconds/3600,SignInPasswordPromo.Enable3:dismissal_threshold/3,SubresourceFilter.EnabledForPhishingSites:enable_presets/liverun_on_phishing_sites,TLS13Variant.DraftEnabled:variant/draft,TranslateRankerModel.QueryExperiment2:translate-ranker-model-url/https%3A%2F%2Fwww%2Egstatic%2Ecom%2Fchrome%2Fintelligence%2Fassist%2Franker%2Fmodels%2Ftranslate%2F2017%2F03%2Ftranslate_ranker_model_20170329%2Epb%2Ebin,TranslateServerStudy.SmartRendering:server_params/smrd,UKM.Enabled:RecordSessionId/true,WebBluetoothBlocklist.TestGroup:blocklist_additions/00060000%3Ae%2Cfffd%3Ae%2Ced5f25a4%3Ae', '--enable-stats-collection-bindings', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--enable-gpu-benchmarking', '--disable-background-networking', '--proxy-server=socks://localhost:62624', '--ignore-certificate-errors', '--disable-component-extensions-with-background-pages', '--disable-default-apps', '--disable-search-geolocation-disclosure', '--remote-debugging-port=0', '--enable-crash-reporter-for-testing', '--disable-component-update', '--window-size=1280,1024', '--user-data-dir=e:\\b\\swarm_slave\\w\\itzexods\\tmpjxt4ol', 'about:blank']
  Discovered ephemeral port 62630
  OS: win win7
  Detailed OS version: 6.1.7601
  Browser command line: "e:\b\swarm_slave\w\ir\out\Release\chrome.exe" --disable-features=DocumentWriteEvaluator<DisallowFetchForDocWrittenScriptsInMainFrame,LazyParseCSS<LazyParseCSS,TranslateRankerEnforcement<TranslateRankerModel --force-fieldtrials=AlternateComponentUrls/AlternateComponentUrls/AutofillClassifier/Enabled/AutofillCreditCardSigninPromo/EnabledThree/AutofillFieldMetadata/Enabled/AutofillProfileCleanup/Enabled/AutofillProfileOrderByFrecency/EnabledLimitTo3/AutomaticTabDiscarding/Enabled_Once_10-gen2/BackgroundVideoOptimizations/BackgroundOptimizationEnabled1sOrLessMediaSource/BrowserBlacklist/Enabled/BrowserScheduler/RedirectWithDefaultInitParams/CSSExternalScanner/Enabled_ScanAndPreload/CaptivePortalCertificateList/Enabled/CaptivePortalInterstitial/Enabled/CheckerImaging/CheckerImaging/ChildAccountDetection/Disabled/ChromeDashboard/Enabled/ChromotingQUIC/Enabled/DataReductionProxyUseQuic/Enabled/DefaultBrowserInfobar/SettingsTextNotNow/DefaultBrowserPromptStyle/ColoredLogoOnWhiteBackground/DefaultEnableGpuRasterization/DefaultEnableGpuRasterization/DelayNavigation/DelayNavigation/DesktopIOSPromotion/SavePasswordsBubblePromotionV1/DirectCompositionOverlays/DirectCompositionOverlays/DisallowFetchForDocWrittenScriptsInMainFrame/DocumentWriteScriptBlockGroup_20161208_Launch/EnableAppContainer/Enabled/EnableGoogleCachedCopyTextExperiment/Button/EnableMediaRemoting/Enabled/EnableMediaRouter/Enabled/EnableMediaRouterWithCastExtension/Enabled/EnableSessionCrashedBubbleUI/Enabled/EnableSyncClientToServerCompression/Enabled/EnableSyncUSSDeviceInfo/Enabled/ExpectCTDynamic/DynamicExpectCTEnabled/ExpectCTReporting/ExpectCTReportingEnabled/ExtensionContentVerification/Enforce/ExtensionInstallVerification/Enforce/FasterLocationReload/Enabled/GoogleBrandedContextMenu/branded/GoogleNow/Enable/GpuScheduler/Enabled/Html5ByDefault/Enabled/HttpFormWarning/Enabled/IdleTimeSpellChecking/Enabled/ImprovedRecoveryComponent/ImprovedRecoveryComponent/IncludeBetaForumMenuItem/Enabled/IncognitoWindowPromo/Enabled/InstanceID/Enabled/IntelligentSessionRestore/Enabled/LazyParseCSS/Control/LoadingWithMojo/Enabled/MaterialDesignDownloads/Enabled/MaterialDesignUserManager/Enabled/MediaFoundationH264Encoding/Enabled/MidiManagerDynamicInstantiation/Enabled/MojoChannel/Enabled/NTPCaptureThumbnail/Enabled/NTPTilesInInstantService/Enabled/NetDelayableH2AndQuicRequests/Enabled/NetworkQualityEstimator/Enabled/NetworkSchedulerYielding/Enabled/NewProfileManagement/Enabled/NewTabInProductHelp/Enabled_1/NoStatePrefetchValidation/PrerenderDisabled_R2/OfferUploadCreditCards/Enabled/OneGoogleBarOnLocalNtp/Enabled/OutOfProcessPac/Enabled/PageRevisitInstrumentation/Enabled/PassiveDocumentEventListeners/Enabled/PassiveEventListenersDueToFling/Enabled/PasswordBranding/SmartLockBrandingSavePromptOnly/PasswordGeneration/Disabled/PasswordMetadataFilling/Enabled/PasswordProtectionPasswordFieldOnFocusPing/SBEROnlyNoIncognito2/PasswordProtectionProtectedPasswordEntryPing/AllPopulation/PasswordSeparatedSigninFlow/Enabled/PasswordSmartBubble/3-Times/PermissionPromptUIViews/BlockPromptsEnabled/PersistentHistograms/EnabledOnDisk5/PreconnectMore/Enabled/PrintScaling/Enabled/QUIC/Enabled/RafAlignedMouseInput/Enabled/RafAlignedTouchInput/Enabled/RefreshTokenDeviceId/Enabled/ReportCertificateErrors/ShowAndPossiblySend/ReportingAPI/ReportingEnabled/SRTPromptFieldTrial/On/SSLCommonNameMismatchHandling/Enabled/SafeBrowsingIncidentReportingService/Enabled/SafeBrowsingIncidentReportingServiceFeatures/WithSuspiciousModuleReporting/SafeBrowsingScoutTransitionStudy/CanShowScoutOptInGroup2/SafeBrowsingThreatDomDetailsTagAttributes/AdIdentifiers/SafeBrowsingV4LocalDatabaseManagerEnabled/V4Only2/SaveAsMenuText/download/SchedulerExpensiveTaskBlocking/Enabled/SdchPersistence/Enabled/SecurityChip/Enabled/ServiceWorkerNavigationPreload/Enabled/SettingsEnforcement/enforce_always_with_extensions_and_dse/SettingsResetPrompt/Enabled/SignInPasswordPromo/Enable3/SocketReadIfReady/Enabled/SpeculativeLaunchServiceWorker/Enabled/StrictSecureCookies/Enabled/SubresourceFilter/EnabledForPhishingSites/SuperfishInterstitial/Enabled/SyncUSSAutocomplete/Enabled/SyncUserEvents/Enabled/TLS13Variant/DraftEnabled/TabSyncByRecency/Enabled/TokenBinding/TokenBinding/TranslateRankerModel/QueryExperiment2/TranslateServerStudy/SmartRendering/TranslateUI2016Q2/TranslateUI2016Q2OnGroup/TriggeredResetFieldTrial/On/UKM/Enabled/V8AsmJSToWasm/AsmJsToWebAssembly/V8CacheStrategiesForCacheStorage/default/V8Ignition/Future/VideoCaptureService/Enabled/VsyncAlignedInput/Enable/WebBluetoothBlocklist/TestGroup/WebFontsInterventionV2/Enabled-slow2g/WebRTC-EnableWebRtcEcdsa/Enabled/WebRTC-H264WithOpenH264FFmpeg/Enabled/WebRTC-LocalIPPermissionCheck/Enabled/use-new-media-cache/Enabled --enable-features=AlternateComponentUrls<AlternateComponentUrls,AutofillCreditCardSigninPromo<AutofillCreditCardSigninPromo,AutofillProfileCleanup<AutofillProfileCleanup,AutomaticTabDiscarding<AutomaticTabDiscarding,BackgroundVideoTrackOptimization<BackgroundVideoOptimizations,CaptivePortalCertificateList<CaptivePortalCertificateList,CheckerImaging<CheckerImaging,DefaultEnableGpuRasterization<DefaultEnableGpuRasterization,DelayNavigation<DelayNavigation,DesktopIOSPromotion<DesktopIOSPromotion,DirectCompositionOverlays<DirectCompositionOverlays,MediaRemoting<EnableMediaRemoting,EnableSyncClientToServerCompression<EnableSyncClientToServerCompression,EnableSyncUSSDeviceInfo<EnableSyncUSSDeviceInfo,DynamicExpectCT<ExpectCTDynamic,ExpectCTReporting<ExpectCTReporting,FasterLocationReload<FasterLocationReload,GpuScheduler<GpuScheduler,PreferHtmlOverPlugins<Html5ByDefault,HttpFormWarning<HttpFormWarning,IdleTimeSpellChecking<IdleTimeSpellChecking,ImprovedRecoveryComponent<ImprovedRecoveryComponent,IncludeBetaForumMenuItem<IncludeBetaForumMenuItem,IPH_IncognitoWindow<IncognitoWindowPromo,LoadingWithMojo<LoadingWithMojo,MaterialDesignUserManager<MaterialDesignUserManager,MediaFoundationH264Encoding<MediaFoundationH264Encoding,MidiManagerDynamicInstantiation<MidiManagerDynamicInstantiation,CaptureThumbnailDependingOnTransitionType<NTPCaptureThumbnail,CaptureThumbnailOnNavigatingAway<NTPCaptureThumbnail,NTPTilesInInstantService<NTPTilesInInstantService,PrioritySupportedRequestsDelayable<NetDelayableH2AndQuicRequests,NetworkSchedulerYielding<NetworkSchedulerYielding,IPH_NewTab<NewTabInProductHelp,NoStatePrefetch<NoStatePrefetchValidation,OneGoogleBarOnLocalNtp<OneGoogleBarOnLocalNtp,PassiveDocumentEventListeners<PassiveDocumentEventListeners,PassiveEventListenersDueToFling<PassiveEventListenersDueToFling,PasswordMetadataFilling<PasswordMetadataFilling,PasswordFieldOnFocusPinging<PasswordProtectionPasswordFieldOnFocusPing,ProtectedPasswordEntryPinging<PasswordProtectionProtectedPasswordEntryPing,UsePasswordSeparatedSigninFlow<PasswordSeparatedSigninFlow,BlockPromptsIfDismissedOften<PermissionPromptUIViews,PersistentHistograms<PersistentHistograms,PreconnectMore<PreconnectMore,PrintScaling<PrintScaling,RafAlignedMouseInput<RafAlignedMouseInput,RafAlignedTouchInput<RafAlignedTouchInput,Reporting<ReportingAPI,IncidentReportingDisableUpload<SafeBrowsingIncidentReportingService,IncidentReportingModuleLoadAnalysis<SafeBrowsingIncidentReportingServiceFeatures,IncidentReportingSuspiciousModuleReporting<SafeBrowsingIncidentReportingServiceFeatures,CanShowScoutOptIn<SafeBrowsingScoutTransitionStudy,ThreatDomDetailsTagAttributes<SafeBrowsingThreatDomDetailsTagAttributes,SafeBrowsingV4LocalDatabaseManagerEnabled<SafeBrowsingV4LocalDatabaseManagerEnabled,SafeBrowsingV4OnlyEnabled<SafeBrowsingV4LocalDatabaseManagerEnabled,SecurityChip<SecurityChip,ServiceWorkerNavigationPreload<ServiceWorkerNavigationPreload,SettingsResetPrompt<SettingsResetPrompt,SocketReadIfReady<SocketReadIfReady,SpeculativeLaunchServiceWorker<SpeculativeLaunchServiceWorker,SubresourceFilter<SubresourceFilter,SuperfishInterstitial<SuperfishInterstitial,SyncUSSAutocomplete<SyncUSSAutocomplete,SyncUserEvents<SyncUserEvents,token-binding<TokenBinding,TranslateRankerQuery<TranslateRankerModel,TranslateUI2016Q2<TranslateUI2016Q2,Ukm<UKM,AsmJsToWebAssembly<V8AsmJSToWasm,V8Future<V8Ignition,MojoVideoCapture<VideoCaptureService,RequestUnbufferedDispatch<VsyncAlignedInput,VsyncAlignedInput<VsyncAlignedInput,WebRTC-EnableWebRtcEcdsa<WebRTC-EnableWebRtcEcdsa,WebRTC-H264WithOpenH264FFmpeg<WebRTC-H264WithOpenH264FFmpeg,use-new-media-cache<use-new-media-cache --force-fieldtrial-params="AutofillCreditCardSigninPromo.EnabledThree:impression_limit/3,AutofillProfileOrderByFrecency.EnabledLimitTo3:limit/3,AutomaticTabDiscarding.Enabled_Once_10-gen2:MinimumProtectionTime/600,BackgroundVideoOptimizations.BackgroundOptimizationEnabled1sOrLessMediaSource:max_keyframe_distance_media_source_ms/1000/max_keyframe_distance_ms/0,CSSExternalScanner.Enabled_ScanAndPreload:cssExternalScannerNoPreload/false/cssExternalScannerPreload/true,DataReductionProxyUseQuic.Enabled:enable_warmup/true,DefaultBrowserPromptStyle.ColoredLogoOnWhiteBackground:IconColor/Colored/InfoBarType/PageAction,DelayNavigation.DelayNavigation:delay_millis/4/delay_probability/0%2E5/randomize_delay/true,DesktopIOSPromotion.SavePasswordsBubblePromotionV1:body_text_id/0/entry_point/SavePasswordsBubblePromotion/max_views/3/promo_variation_id/1/sms_id/19001508/title_text_id/0,DisallowFetchForDocWrittenScriptsInMainFrame.DocumentWriteScriptBlockGroup_20161208_Launch:disallowFetchForDocWrittenScriptsInMainFrame/false/disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections/true,Html5ByDefault.Enabled:engagement_threshold_for_flash/32,IncognitoWindowPromo.Enabled:availability/any/event_history_deleted/name%3Ahistory_deleted;comparator%3A>=1;window%3A3650;storage%3A3650/event_incognito_window_opened/name%3Aincognito_window_opened;comparator%3A==0;window%3A3650;storage%3A3650/event_session_time/name%3Asession_time;comparator%3A>=1;window%3A3650;storage%3A3650/event_trigger/name%3Aincognito_window_trigger;comparator%3Aany;window%3A3650;storage%3A3650/event_used/name%3Aincognito_window_clicked;comparator%3Aany;window%3A3650;storage%3A3650/session_rate/<=3,NetworkQualityEstimator.Enabled:2G%2EDefaultMedianKbps/81/2G%2EDefaultMedianRTTMsec/1337/3G%2EDefaultMedianKbps/658/3G%2EDefaultMedianRTTMsec/297/4G%2EDefaultMedianKbps/1756/4G%2EDefaultMedianRTTMsec/159/Bluetooth%2EDefaultMedianKbps/449/Bluetooth%2EDefaultMedianRTTMsec/135/Ethernet%2EDefaultMedianKbps/3263/Ethernet%2EDefaultMedianRTTMsec/106/HalfLifeSeconds/60/None%2EDefaultMedianKbps/567/None%2EDefaultMedianRTTMsec/272/Slow2G%2EThresholdMedianHttpRTTMsec/2000/Unknown%2EDefaultMedianKbps/1916/Unknown%2EDefaultMedianRTTMsec/121/WiFi%2EDefaultMedianKbps/2736/WiFi%2EDefaultMedianRTTMsec/168/correlation_logging_probability/0%2E001,NewTabInProductHelp.Enabled_1:availability/any/event_new_tab_opened/name%3Anew_tab_opened;comparator%3A==0;window%3A3650;storage%3A3650/event_omnibox_used/name%3Aomnibox_used;comparator%3A>=1;window%3A3650;storage%3A3650/event_session_time/name%3Asession_time;comparator%3A>=1;window%3A3650;storage%3A3650/event_trigger/name%3Anew_tab_trigger;comparator%3Aany;window%3A3650;storage%3A3650/event_used/name%3Anew_tab_clicked;comparator%3Aany;window%3A3650;storage%3A3650/session_rate/<=3/x_promo_string/0,NoStatePrefetchValidation.PrerenderDisabled_R2:instant_mode/simple_load/mode/simple_load/omnibox_mode/simple_load,PasswordProtectionPasswordFieldOnFocusPing.SBEROnlyNoIncognito2:extended_reporting/true/history_sync/false/incognito/false,PasswordProtectionProtectedPasswordEntryPing.AllPopulation:all_population/true/incognito/true,PasswordSmartBubble.3-Times:dismissal_count/3,PersistentHistograms.EnabledOnDisk5:send_unreported_metrics/yes/storage/MappedFile,ReportCertificateErrors.ShowAndPossiblySend:sendingThreshold/1%2E0,SafeBrowsingIncidentReportingService.Enabled:collect_reg_data/true,SafeBrowsingThreatDomDetailsTagAttributes.AdIdentifiers:tag_attribute_csv/div%2Cdata-google-query-id%2Cdiv%2Cid%2Ciframe%2Cid,SecurityChip.Enabled:animation/animate-nonsecure-only/visibility/show-all,SettingsResetPrompt.Enabled:delay_before_prompt_seconds/1/domain_hashes/{\"c027a731da03fee479b2ba00b3afe74b3fd9190f0622755db8ffa504efbde66e\"%3A\"3\"}/prompt_wave/20170101/time_between_prompts_seconds/3600,SignInPasswordPromo.Enable3:dismissal_threshold/3,SubresourceFilter.EnabledForPhishingSites:enable_presets/liverun_on_phishing_sites,TLS13Variant.DraftEnabled:variant/draft,TranslateRankerModel.QueryExperiment2:translate-ranker-model-url/https%3A%2F%2Fwww%2Egstatic%2Ecom%2Fchrome%2Fintelligence%2Fassist%2Franker%2Fmodels%2Ftranslate%2F2017%2F03%2Ftranslate_ranker_model_20170329%2Epb%2Ebin,TranslateServerStudy.SmartRendering:server_params/smrd,UKM.Enabled:RecordSessionId/true,WebBluetoothBlocklist.TestGroup:blocklist_additions/00060000%3Ae%2Cfffd%3Ae%2Ced5f25a4%3Ae" --enable-stats-collection-bindings --enable-net-benchmarking --metrics-recording-only --no-default-browser-check --no-first-run --enable-gpu-benchmarking --disable-background-networking --proxy-server=socks://localhost:62624 --ignore-certificate-errors --disable-component-extensions-with-background-pages --disable-default-apps --disable-search-geolocation-disclosure --remote-debugging-port=0 --enable-crash-reporter-for-testing --disable-component-update --window-size=1280,1024 --user-data-dir="e:\b\swarm_slave\w\itzexods\tmpjxt4ol" --flag-switches-begin --flag-switches-end about:blank
  GPU device 0: VENDOR = 0x15ad, DEVICE = 0x405
  GPU Attributes:
    amd_switchable      : False
    basic_info_state    : 1
    can_support_threaded_texture_mailbox: False
    context_info_state  : 1
    direct_rendering    : True
    driver_date         : 2017/04/07
    driver_vendor       : Google Inc.
    driver_version      : 3.3.0.2
    dx_diagnostics_info_state: 3
    gl_extensions       : 
    gl_renderer         : Google SwiftShader
    gl_reset_notification_strategy: 0
    gl_vendor           : Google Inc.
    gl_version          : OpenGL ES 2.0 SwiftShader
    gl_ws_extensions    : 
    gl_ws_vendor        : 
    gl_ws_version       : 
    hdr                 : False
    in_process_gpu      : True
    initialization_time : 0
    jpeg_decode_accelerator_supported: False
    max_msaa_samples    : 4
    optimus             : False
    passthrough_cmd_decoder: False
    pixel_shader_version: 3.0
    process_crash_count : 1
    sandboxed           : False
    software_rendering  : True
    supports_overlays   : False
    vertex_shader_version: 3.0
    video_decode_accelerator_flags: 0
  Feature Status:
    2d_canvas           : unavailable_software
    checker_imaging     : enabled_on
    flash_3d            : unavailable_software
    flash_stage3d       : unavailable_software
    flash_stage3d_baseline: unavailable_software
    gpu_compositing     : unavailable_software
    multiple_raster_threads: enabled_on
    native_gpu_memory_buffers: disabled_software
    rasterization       : unavailable_software
    video_decode        : unavailable_software
    video_encode        : unavailable_software
    webgl               : enabled_readback
    webgl2              : unavailable_off
  Driver Bug Workarounds:
    clear_uniforms_before_first_program_use
    decode_encode_srgb_for_generatemipmap
    disable_accelerated_vpx_decode
    disable_direct_composition
    disable_discard_framebuffer
    disable_dxgi_zero_copy_video
    disable_framebuffer_cmaa
    exit_on_context_lost
    scalarize_vec_and_mat_constructor_args
  Issuing command to ts_proxy_server: set rtt 0
  Issuing command to ts_proxy_server: set inkbps 0
  Issuing command to ts_proxy_server: set outkbps 0
  PageCacheTemperature: any
  *************** BROWSER STANDARD OUTPUT ***************
  
  *********** END OF BROWSER STANDARD OUTPUT ************
  ********************* BROWSER LOG *********************
  No log file
  ***************** END OF BROWSER LOG ******************
  Either tab has crashed or browser does not support taking tab screenshot. Skip taking screenshot on failure.
  rmtree is invoked with arguments: ('e:\\b\\swarm_slave\\w\\itzexods\\tmpjxt4ol',) {'ignore_errors': True}
  Call site info:   File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\browser\browser.py", line 276, in Close
      self._browser_backend.Close()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome\desktop_browser_backend.py", line 651, in Close
      shutil.rmtree(self._tmp_profile_dir, ignore_errors=True)
  
  rmtree is invoked with arguments: ('e:\\b\\swarm_slave\\w\\itzexods\\tmp06rsjk',) {'ignore_errors': True}
  Call site info:   File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\browser\browser.py", line 276, in Close
      self._browser_backend.Close()
    File "e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome\desktop_browser_backend.py", line 659, in Close
      shutil.rmtree(self._tmp_minidump_dir, ignore_errors=True)
  
  rmtree is invoked with arguments: ('e:\\b\\swarm_slave\\w\\itzexods\\tmpkecjub',) {}
  Call site info:   File "e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\results\page_test_results.py", line 194, in PopulateHistogramSet
      vinn_result = convert_chart_json.ConvertChartJson(chart_json_path)
    File "e:\b\swarm_slave\w\ir\third_party\catapult\tracing\tracing\value\convert_chart_json.py", line 24, in ConvertChartJson
      js_args=[os.path.abspath(chart_json)])
    File "e:\b\swarm_slave\w\ir\third_party\catapult\third_party\vinn\vinn\_vinn.py", line 188, in RunFile
      shutil.rmtree(temp_dir)
  
  Try printing formatted exception: None None None
  
  Traceback (most recent call last):
    RunBenchmark at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py:399
      expectations=expectations, metadata=benchmark.GetMetadata())
    Run at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py:262
      _RunStoryAndProcessErrorIfNeeded(story, results, state, test)
    _RunStoryAndProcessErrorIfNeeded at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py:104
      state.RunStory(results)
    traced_function at e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
      return func(*args, **kwargs)
    RunStory at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\page\shared_page_state.py:314
      self._current_page.Run(self)
    Run at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\page\__init__.py:108
      shared_state.page_test.RunNavigateSteps(self, current_tab)
    traced_function at e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
      return func(*args, **kwargs)
    RunNavigateSteps at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\page\legacy_page_test.py:177
      page.RunNavigateSteps(action_runner)
    RunNavigateSteps at e:\b\swarm_slave\w\ir\tools\perf\page_sets\system_health\multi_tab_stories.py:29
      new_tab = tabs.New()
    New at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\browser\tab_list.py:9
      return self._tab_list_backend.New(timeout)
    New at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome\tab_list_backend.py:43
      return self.GetBackendFromContextId(context_id)
    GetBackendFromContextId at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend_list.py:75
      context_id)
    GetInspectorBackend at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\devtools_client_backend.py:474
      self._app_backend.app, self._devtools_client, context)
    traced_function at e:\b\swarm_slave\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
      return func(*args, **kwargs)
    __init__ at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py:72
      self._websocket, timeout=timeout)
    __init__ at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_page.py:26
      self._EnablePageNotifications(timeout=timeout)
    _EnablePageNotifications at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_page.py:80
      res = self._inspector_websocket.SyncRequest(request, timeout)
    SyncRequest at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py:110
      res = self._Receive(timeout)
    _Receive at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py:149
      data = self._socket.recv()
    recv at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py:293
      opcode, data = self.recv_data()
    recv_data at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py:310
      opcode, frame = self.recv_data_frame(control_frame)
    recv_data_frame at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py:323
      frame = self.recv_frame()
    recv_frame at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py:357
      return self.frame_buffer.recv_frame()
    recv_frame at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py:336
      self.recv_header()
    recv_header at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py:286
      header = self.recv_strict(2)
    recv_strict at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py:371
      bytes_ = self.recv(min(16384, shortage))
    _recv at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py:427
      return recv(self.sock, bufsize)
    recv at e:\b\swarm_slave\w\ir\third_party\catapult\telemetry\third_party\websocket-client\websocket\_socket.py:80
      bytes_ = sock.recv(bufsize)
  error: [Errno 10054] An existing connection was forcibly closed by the remote host
  
  Locals:
    bufsize : 2
    sock    : <socket._socketobject object at 0x03C56F80>
  
  Traceback (most recent call last):
    File "e:\b\swarm_slave\w\ir\tools\perf\benchmarks\benchmark_smoke_unittest.py", line 85, in BenchmarkSmokeTest
      msg='Failed: %s' % benchmark)
  AssertionError: Failed: <class 'benchmarks.tab_switching.TabSwitchingTypical25'>
"""

I suspect that this is a browser crash, due to "An existing connection was forcibly closed by the remote host". But otherwise this is quite unclear. If this is a crash, can we get a stack trace or crashpad dump?