The autotest failure emails look like this:

This report is automatically generated to track the following Failure:
Test: desktopui_MashLogin.
Suite: bvt-perbuild.
Chrome Version: 70.0.3511.0.
Build: asuka-release/R70-10952.0.0.

Reason:
Mash login screen does not look right..
build artifacts:
https://storage.cloud.google.com/?arg=chromeos-image-archive/asuka-release/R70-10952.0.0.
results log: http://ubercautotest.corp.google.com/tko/retrieve_logs.cgi?job=/results/225208317-chromeos-test/chromeos6-row2-rack22-host11/debug/.
status log: http://ubercautotest.corp.google.com/tko/retrieve_logs.cgi?job=/results/225208317-chromeos-test/chromeos6-row2-rack22-host11/status.log.
job link: http://cautotest-prod/afe/#tab_id=view_job&object_id=225208317.

You may want to check the test history:
https://stainless.corp.google.com/search?test=^desktopui\_MashLogin$&first_date=2018-07-12&last_date=2018-08-09&row=model&col=build&view=matrix
You may also want to check the test retry dashboard in case this is a
flakey test: https://wmatrix.googleplex.com/retry_teststats/?days_back=30&tests=desktopui_MashLogin

The last link to wmatrix takes me to a page saying wmatrix is deprecated, the database hasn't been updated in > 30 days, and there are no results.

If wmatrix is really gone, the link should be removed from the email, or point to the relevant thing in stainless.

(Also, the stainless link, while correct, doesn't link-ify correctly in gmail -- the link stops at the ^ caret. It would be cool if those linkified correctly.)