Another issue here is that the assertion failure cause Findit post message on the revert CL repeatly.

The revert CL is https://chromium-review.googlesource.com/c/621287

bump up priority

The root cause of this assertion error is because one of the sheriff's email address is in wrong format: xxx@chromium.org@google.com

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/64878ca445cbe64dc0023778ac5cda522aa2eadd

commit 64878ca445cbe64dc0023778ac5cda522aa2eadd
Author: Chan <chanli@chromium.org>
Date: Mon Aug 21 22:32:08 2017

[Findit] Fix bug when getting sheriff's emails

Bug:  756896 
Change-Id: I5b2623c11cb9cdc581b55375230e6a6087286588
Reviewed-on: https://chromium-review.googlesource.com/624460
Commit-Queue: Chan Li <chanli@chromium.org>
Reviewed-by: Shuotao Gao <stgao@chromium.org>

[modify] https://crrev.com/64878ca445cbe64dc0023778ac5cda522aa2eadd/appengine/findit/common/test/rotations_test.py
[modify] https://crrev.com/64878ca445cbe64dc0023778ac5cda522aa2eadd/appengine/findit/common/rotations.py

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/aea7fe076ff16452ef422c5384da177ccacdd0e2

commit aea7fe076ff16452ef422c5384da177ccacdd0e2
Author: Chan <chanli@chromium.org>
Date: Mon Aug 28 21:07:10 2017

[Findit] Auto-revert: Remove assert of email format and don't send duplicated messages.

Bug:  756896 
Change-Id: Idfedd570e6943a4d3abdedad181090121c5a8dcd
Reviewed-on: https://chromium-review.googlesource.com/621963
Commit-Queue: Chan Li <chanli@chromium.org>
Reviewed-by: Jeffrey Li <lijeffrey@chromium.org>
Reviewed-by: Shuotao Gao <stgao@chromium.org>

[modify] https://crrev.com/aea7fe076ff16452ef422c5384da177ccacdd0e2/appengine/findit/infra_api_clients/codereview/gerrit.py
[modify] https://crrev.com/aea7fe076ff16452ef422c5384da177ccacdd0e2/appengine/findit/infra_api_clients/codereview/test/gerrit_test.py