raceback (most recent call last):
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\story_runner.py", line 88, in _RunStoryAndProcessErrorIfNeeded
    state.RunStory(results)
  File "c:\b\s\w\irylwxz5\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\page\shared_page_state.py", line 299, in RunStory
    self._current_page.Run(self)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\page\__init__.py", line 112, in Run
    self.RunPageInteractions(action_runner)
  File "c:\b\s\w\irylwxz5\tools\perf\page_sets\infinite_scroll_cases.py", line 34, in RunPageInteractions
    self.repeat)
  File "c:\b\s\w\irylwxz5\tools\perf\page_sets\infinite_scroll_cases.py", line 46, in _ScrollAction
    action_runner.tab.browser.DumpMemory()
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\actions\action_runner.py", line 841, in __exit__
    self.End()
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\actions\action_runner.py", line 861, in End
    self._label, self._flags))
  File "c:\b\s\w\irylwxz5\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\actions\action_runner.py", line 214, in ExecuteJavaScript
    return self._tab.ExecuteJavaScript(*args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\browser\web_contents.py", line 144, in ExecuteJavaScript
    return self._inspector_backend.ExecuteJavaScript(*args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py", line 40, in inner
    inspector_backend._ConvertExceptionFromInspectorWebsocket(e)
  File "c:\b\s\w\irylwxz5\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py", line 37, in inner
    return func(inspector_backend, *args, **kwargs)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py", line 216, in ExecuteJavaScript
    self._runtime.Execute(statement, context_id, timeout)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_runtime.py", line 21, in Execute
    self.Evaluate(expr + '; 0;', context_id, timeout)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_runtime.py", line 45, in Evaluate
    res = self._inspector_websocket.SyncRequest(request, timeout)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py", line 110, in SyncRequest
    res = self._Receive(timeout)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py", line 149, in _Receive
    data = self._socket.recv()
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 293, in recv
    opcode, data = self.recv_data()
  File "c:\b\s\w\irylwxz5\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 "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 323, in recv_data_frame
    frame = self.recv_frame()
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 357, in recv_frame
    return self.frame_buffer.recv_frame()
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py", line 336, in recv_frame
    self.recv_header()
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py", line 286, in recv_header
    header = self.recv_strict(2)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_abnf.py", line 371, in recv_strict
    bytes_ = self.recv(min(16384, shortage))
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_core.py", line 427, in _recv
    return recv(self.sock, bufsize)
  File "c:\b\s\w\irylwxz5\third_party\catapult\telemetry\third_party\websocket-client\websocket\_socket.py", line 93, in recv
    "Connection is already closed.")
DevtoolsTargetCrashException: Devtools target crashed