Log:
[1/1] core.stacktrace_unittest.TabStackTraceTest.testCrashSymbols failed unexpectedly 0.7400s:
  Chrome build location for win_AMD64 not found. Browser will be run without Flash.
  Requested remote debugging port: 0
  Starting Chrome ['e:\\b\\swarm_slave\\work\\isolated\\runq4jsd4\\out\\Release\\chrome.exe', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--enable-gpu-benchmarking', '--disable-background-networking', '--no-proxy-server', '--disable-component-extensions-with-background-pages', '--disable-default-apps', '--remote-debugging-port=0', '--enable-crash-reporter-for-testing', '--window-size=1280,1024', '--user-data-dir=e:\\b\\swarm_slave\\work\\isolated\\tmpy_gorq\\tmpi0fyze', 'about:blank']
  Discovered ephemeral port 58923
  Minidump found: e:\b\swarm_slave\work\isolated\tmpy_gorq\tmp6vzngt\reports\23b4b7ce-aceb-4e1b-a391-b7702e1107bf.dmp
  Traceback (most recent call last):
    File "e:\b\swarm_slave\work\isolated\runq4jsd4\tools\perf\core\stacktrace_unittest.py", line 33, in testCrashSymbols
      self.assertIn('CrashIntentionally', '\n'.join(e.stack_trace))
  AssertionError: 'CrashIntentionally' not found in 'ChildEBP RetAddr  \nWARNING: Stack unwind information not available. Following frames may be wrong.\n0017d844 61e10710 chrome_child!ovly_debug_event+0x22cd6d\n0017d9d0 61e0a550 chrome_child!ovly_debug_event+0x236a10\n0017dbe4 61e0df00 chrome_child!ovly_debug_event+0x230850\n0017dcfc 61e01039 chrome_child!ovly_debug_event+0x234200\n0017dfa0 61e0cc79 chrome_child!ovly_debug_event+0x227339\n0017e108 6252dd1e chrome_child!ovly_debug_event+0x232f79\n0017e1d0 6252dc7c chrome_child!IsSandboxedProcess+0x2f85fe\n0017e298 61d9b521 chrome_child!IsSandboxedProcess+0x2f855c\n0017e2dc 6089210e chrome_child!ovly_debug_event+0x1c1821\n0017e2f0 61da9616 chrome_child!GetHandleVerifier+0x6572e\n0017e300 60861177 chrome_child!ovly_debug_event+0x1cf916\n0017e364 6314bcbd chrome_child!GetHandleVerifier+0x34797\n0017e65c 6314b1b0 chrome_child!IsSandboxedProcess+0xf1659d\n0017e858 6314c5cf chrome_child!IsSandboxedProcess+0xf15a90\n0017e87c 60861177 chrome_child!IsSandboxedProcess+0xf16eaf\n0017e8e0 6082ec7b chrome_child!GetHandleVerifier+0x34797\n0017eef8 6082e293 chrome_child!GetHandleVerifier+0x229b\n0017ef7c 6086350b chrome_child!GetHandleVerifier+0x18b3\n0017f054 6082e7b7 chrome_child!GetHandleVerifier+0x36b2b\n0017f11c 60863719 chrome_child!GetHandleVerifier+0x1dd7\n0017f144 6082e742 chrome_child!GetHandleVerifier+0x36d39\n0017f218 61e2e39a chrome_child!GetHandleVerifier+0x1d62\n0017f4a0 60807754 chrome_child!ovly_debug_event+0x25469a\n0017f570 60807623 chrome_child!ChromeMain+0xa1fb4\n0017f674 608049e3 chrome_child!ChromeMain+0xa1e83\n0017f684 6076580b chrome_child!ChromeMain+0x9f243\n*** WARNING: Unable to verify checksum for chrome.exe\nNo .natvis files found at e:\\b\\swarm_slave\\work\\isolated\\runq4jsd4\\out\\Release\\cdb\\Visualizers.\n0017f6c4 00c5766c chrome_child!ChromeMain+0x6b\n0017f778 00c56d41 chrome!MainDllLoader::Launch+0x2ec\n0017f96c 00cbf459 chrome!wWinMain+0x241\n*** WARNING: Unable to verify checksum for kernel32.dll\n*** ERROR: Symbol file could not be found.  Defaulted to export symbols for kernel32.dll - \n(Inline) -------- chrome!invoke_main+0x1a\n0017f9b8 75ad336a chrome!__scrt_common_main_seh+0xfd\n0017f9c4 779492b2 kernel32!BaseThreadInitThunk+0x12\n0017fa04 77949285 ntdll!RtlInitializeExceptionChain+0x63\n0017fa1c 00000000 ntdll!RtlInitializeExceptionChain+0x36'
(INFO) 2016-04-06 17:03:40,717 desktop_browser_backend._TryCooperativeShutdown:528  Successfully shut down browser cooperatively


See https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_ng/builds/200944