I'm only really familiar with run_suite.py, the Autotest part.

This line in the log is printing at the very end of run_suite.py:

   Will return from run_suite with status: OK

Thus, the result is correct at the moment it is leaving run_suite.py (Autotest)

If you check the Report stdout:

   ** PASS PaygenTestDev (1:44:00)

So it looks good there.  I don't know why it shows up as red in Luci

I think the actual failure is this:

Failed in stage Paygen:
<class 'chromite.lib.parallel.ProcessSilentTimeout'>: No output from <_BackgroundTask(_BackgroundTask-7:6:6:3, started)> for 8610 seconds
01:39:14: INFO: RunCommand: python /b/c/goma_client/goma_ctl.py stop
using /b/c/cbuild/repository/chroot/tmp/goma_tmp_dir.oep3Ug as tmpdir
Killing compiler proxy.
compiler proxy status:  goma is not running.
01:39:14: INFO: Goma log directory is: /b/c/cbuild/repository/chroot/tmp/goma_tmp_dir.oep3Ug/log_dir
01:39:14: INFO: Goma log upload destination: gs://chrome-goma-log/2017/11/01/cros-beefy26-c2
01:39:14: INFO: BuilderInfo: {"builder": "daisy_skate-release", "master": "chromeos", "slave": "cros-beefy26-c2", "clobber": false, "os": "chromeos"}
01:39:14: INFO: Uploading /b/c/cbuild/repository/chroot/tmp/goma_tmp_dir.oep3Ug/log_dir/compiler_proxy-subproc.cros-beefy26-c2.chrome-bot.log.INFO.20171031-200218.1104
01:39:14: INFO: RunCommand: /b/c/cbuild/repository/.cache/common/gsutil_4.27.tar.gz/gsutil/gsutil -o 'Boto:num_retries=10' -h 'x-goog-meta-builderinfo:{"builder": "daisy_skate-release", "master": "chromeos", "slave": "cros-beefy26-c2", "clobber": false, "os": "chromeos"}' cp -v -Z -- /b/c/cbuild/repository/chroot/tmp/goma_tmp_dir.oep3Ug/log_dir/compiler_proxy-subproc.cros-beefy26-c2.chrome-bot.log.INFO.20171031-200218.1104 gs://chrome-goma-log/2017/11/01/cros-beefy26-c2/compiler_proxy-subproc.cros-beefy26-c2.chrome-bot.log.INFO.20171031-200218.1104.gz
01:39:16: INFO: Uploading /b/c/cbuild/repository/chroot/tmp/goma_tmp_dir.oep3Ug/log_dir/compiler_proxy.cros-beefy26-c2.chrome-bot.log.INFO.20171031-200217.1103
01:39:16: INFO: RunCommand: /b/c/cbuild/repository/.cache/common/gsutil_4.27.tar.gz/gsutil/gsutil -o 'Boto:num_retries=10' -h 'x-goog-meta-builderinfo:{"builder": "daisy_skate-release", "master": "chromeos", "slave": "cros-beefy26-c2", "clobber": false, "os": "chromeos"}' cp -v -Z -- /b/c/cbuild/repository/chroot/tmp/goma_tmp_dir.oep3Ug/log_dir/compiler_proxy.cros-beefy26-c2.chrome-bot.log.INFO.20171031-200217.1103 gs://chrome-goma-log/2017/11/01/cros-beefy26-c2/compiler_proxy.cros-beefy26-c2.chrome-bot.log.INFO.20171031-200217.1103.gz
01:39:34: INFO: No gomacc logs found

To clarify, PaygenTestCanary failed, failing Paygen

 Issue 780639  has been merged into this issue.

We're still seeing this pretty regularly, some more examples from today:

https://luci-milo.appspot.com/buildbot/chromeos/caroline-release/1183
https://luci-milo.appspot.com/buildbot/chromeos/daisy_spring-release/2975