The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/b0041f6ac48e8efd50cd553f290ce0ae366379db

commit b0041f6ac48e8efd50cd553f290ce0ae366379db
Author: Alex Klein <saklein@chromium.org>
Date: Wed Sep 05 23:11:06 2018

Cleanup portage_util error classes.

BUG= chromium:880469 
TEST=run_tests

Change-Id: I9631df681c394f295061a48b0f567da5d862c0ef
Reviewed-on: https://chromium-review.googlesource.com/1204871
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Alex Klein <saklein@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/b0041f6ac48e8efd50cd553f290ce0ae366379db/cbuildbot/stages/sdk_stages.py
[modify] https://crrev.com/b0041f6ac48e8efd50cd553f290ce0ae366379db/cbuildbot/stages/sdk_stages_unittest.py
[modify] https://crrev.com/b0041f6ac48e8efd50cd553f290ce0ae366379db/lib/portage_util_unittest.py
[modify] https://crrev.com/b0041f6ac48e8efd50cd553f290ce0ae366379db/lib/portage_util.py
[modify] https://crrev.com/b0041f6ac48e8efd50cd553f290ce0ae366379db/cbuildbot/stages/report_stages.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/8ae485b5d8fa4ef05f9b0046fdf5cbb522fd0d4a

commit 8ae485b5d8fa4ef05f9b0046fdf5cbb522fd0d4a
Author: Alex Klein <saklein@chromium.org>
Date: Wed Sep 05 23:11:07 2018

portage_util: incorrect category regex

The category regex does not match the portage PMS.
It must not begin with a hyphen, dot, or plus sign.

BUG= chromium:880469 
TEST=run_tests, precq

Change-Id: I0588f6c111250816c573df5dd5a37a5b4e9ac7b2
Reviewed-on: https://chromium-review.googlesource.com/1204872
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Alex Klein <saklein@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/8ae485b5d8fa4ef05f9b0046fdf5cbb522fd0d4a/lib/portage_util.py