Looking for help investigating the cause of this flake. It appears in both browser_tests and viz_browser_tests, and is apparently limited to Chrome OS builds.

It is a single flaky test: WebviewClientCertsLoginTest.SigninFrameNoAuthorityGiven

First failure appears here: https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20ChromiumOS%20MSan%20Tests/9853

Suspecting changes related to account manager, because nothing else near the regression range sounds related to to signin.

Hi rockot. I am spinning off a chromeos msan build locally to verify (it might take a couple of hours to finish).

Thanks!

trying to replicate the failure locally I get this (chromeos chrome x86-64 build):

WebviewClientCertsLoginTest.SigninFrameNoAuthorityGiven
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from WebviewClientCertsLoginTest, where TypeParam = 
[ RUN      ] WebviewClientCertsLoginTest.SigninFrameNoAuthorityGiven
HTTPS server started on 127.0.0.1:45301...
sending server_data: {"host": "127.0.0.1", "port": 45301} (36 bytes)
[6277:6328:1129/010458.681425:FATAL:udev_loader.cc(38)] Check failed: false. 
#0 0x55830b9515c1 (/home/tonikitoo/Devel/chromium/testing/src/out/ozone/chrome_os_msan/browser_tests+0x27d75c0)
#1 0x5583213c6e8a (/home/tonikitoo/Devel/chromium/testing/src/out/ozone/chrome_os_msan/browser_tests+0x1824ce89)
#2 0x5583210c0e3a (/home/tonikitoo/Devel/chromium/testing/src/out/ozone/chrome_os_msan/browser_te(...)
#14 0x55832140b602 (/home/tonikitoo/Devel/chromium/testing/src/out/ozone/chrome_os_msan/browser_tests+0x18291601)
#15 0x7f4e118a57fc (/lib/x86_64-linux-gnu/libpthread-2.26.so+0x77fb)
#16 0x7f4e0c4ddb5f (/lib/x86_64-linux-gnu/libc-2.26.so+0x114b5e)

[1/1] WebviewClientCertsLoginTest.SigninFrameNoAuthorityGiven (CRASHED)
1 test crashed:
    WebviewClientCertsLoginTest.SigninFrameNoAuthorityGiven (../../../chrome/browser/chromeos/login/webview_login_browsertest.cc:624)

It seems like it can not load lib udev, and test isnt really running yet.
Do you see the same?

There haven't been any other flakes for a while so marking this as won't fix.

maybe there is: https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20ChromiumOS%20MSan%20Tests

I think that this is not a new problem: https://bugs.chromium.org/p/chromium/issues/detail?id=830337.

Ok, lets dup it, for correctness.