It started here:
https://build.chromium.org/p/chromium.clang/builders/CrWinClang%20tester/builds/204

Since this happens on the pin clanned bots and there was on roll nearby, I assume this is due to a Chromium change.


Example failure:

[ RUN      ] ExtensionViewTests/ExtensionViewTest.ShimSrcAttribute/1
[6032:3200:1020/203726.114:WARNING:chrome_browser_main_win.cc(612)] Command line too long for RegisterApplicationRestart:  --brave-new-test-launcher --cfi-diag=0 --gtest_also_run_disabled_tests --gtest_filter=ExtensionViewTests/ExtensionViewTest.ShimSrcAttribute/1 --single_process --test-launcher-bot-mode --test-launcher-output="C:\Users\CHROME~2\AppData\Local\Temp\scoped_dir6280_15902\results6280_27508\test_results.xml" --test-launcher-summary-output="e:\b\s\w\ioekncwl\output.json" --user-data-dir="C:\Users\CHROME~2\AppData\Local\Temp\scoped_dir6280_15902\d6280_23598" --disable-offline-auto-reload --no-first-run --no-default-browser-check --enable-logging=stderr --safebrowsing-disable-auto-update --disable-default-apps --wm-window-animations-disabled --disable-component-update --test-type=browser --force-color-profile=srgb --disable-zero-browsers-open-for-tests --ipc-connection-timeout=30 --allow-file-access-from-files --dom-automation --log-gpu-control-list-decisions --disable-backgrounding-occluded-windows --disable-gl-drawing-for-tests --override-use-software-gl-for-tests --force-color-profile=srgb --enable-features=GuestViewCrossProcessFrames --disable-features=NetworkPrediction --flag-switches-begin --flag-switches-end --restore-last-session about:blank
../../chrome/browser/extensions/extension_browsertest.cc(513): error:       Expected: num_before + expected_change
      Which is: 4
To be equal to: num_after
      Which is: 3
../../chrome/browser/apps/app_browsertest_util.cc(126): error: Value of: extension
  Actual: false
Expected: true
Received fatal exception EXCEPTION_ACCESS_VIOLATION
Backtrace:
	extensions::Extension::id [0x03A91744+0]
	content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x0297110F+239]
	ChromeBrowserMainParts::PreMainMessageLoopRunImpl [0x0303556C+3514]
	ChromeBrowserMainParts::PreMainMessageLoopRun [0x030346F6+150]
	content::BrowserMainLoop::PreMainMessageLoopRun [0x01BA56E2+66]
	content::StartupTaskRunner::RunAllTasksNow [0x01E05D8E+34]
	content::BrowserMainLoop::CreateStartupTasks [0x01BA4293+487]
	content::BrowserMainRunnerImpl::Initialize [0x01BA7D0B+507]
	content::BrowserMain [0x01BA2C51+97]
	content::RunNamedProcessTypeMain [0x0282548F+123]
	content::ContentMainRunnerImpl::Run [0x028258B2+146]
	service_manager::Main [0x03893B64+620]
	content::ContentMain [0x028253BD+49]
	content::BrowserTestBase::SetUp [0x02970F5B+1227]
	InProcessBrowserTest::SetUp [0x028E3F37+279]
	testing::Test::Run [0x016C4E53+113]
	testing::TestInfo::Run [0x016C5545+213]
	testing::TestCase::Run [0x016C58F2+246]
	testing::internal::UnitTestImpl::RunAllTests [0x016C96EE+606]
	testing::UnitTest::Run [0x016C93B4+178]
	base::TestSuite::Run [0x028FA368+100]
	ChromeTestSuiteRunner::RunTestSuite [0x0513B3AB+75]
	content::LaunchTests [0x02966B8B+299]
	LaunchChromeTests [0x0513B6D3+143]
	main [0x0513B324+112]
	__scrt_common_main_seh [0x05B9CC8A+248] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283)
	BaseThreadInitThunk [0x75B1336A+18]
	RtlInitializeExceptionChain [0x77DE9902+99]
	RtlInitializeExceptionChain [0x77DE98D5+54]