Tried to bootstrap a chroot after an up-to-date cros repo sync:

$ cros_sdk --bootstrap

This fails during emerge of dev-libs/closure_linter and dev-util/google-web-toolkit.

Here's the output from dev-libs/closure_linter:

Started dev-libs/closure_linter-2.3.13-r1 (logged in /tmp/closure_linter-2.3.13-r1-MgeiUI)
=== Start output for job closure_linter-2.3.13-r1 (0m0.7s) ===
closure_linter-2.3.13-r1: >>> Emerging (1 of 1) dev-libs/closure_linter-2.3.13-r1::chromiumos
closure_linter-2.3.13-r1:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
closure_linter-2.3.13-r1:                                  Dload  Upload   Total   Spent    Left  Speed
closure_linter-2.3.13-r1:
closure_linter-2.3.13-r1:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
closure_linter-2.3.13-r1:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
closure_linter-2.3.13-r1: curl: (22) The requested URL returned error: 404 Not Found
closure_linter-2.3.13-r1:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
closure_linter-2.3.13-r1:                                  Dload  Upload   Total   Spent    Left  Speed
closure_linter-2.3.13-r1:
closure_linter-2.3.13-r1:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
closure_linter-2.3.13-r1:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
closure_linter-2.3.13-r1: curl: (22) The requested URL returned error: 404 Not Found
closure_linter-2.3.13-r1:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
closure_linter-2.3.13-r1:                                  Dload  Upload   Total   Spent    Left  Speed
closure_linter-2.3.13-r1:
closure_linter-2.3.13-r1:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
closure_linter-2.3.13-r1:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
closure_linter-2.3.13-r1: curl: (22) The requested URL returned error: 404 Not Found
closure_linter-2.3.13-r1: !!! Couldn't download 'closure_linter-2.3.13.tar.gz'. Aborting.
closure_linter-2.3.13-r1:  * Fetch failed for 'dev-libs/closure_linter-2.3.13-r1', Log file:
closure_linter-2.3.13-r1:  *  '/var/log/portage/dev-libs:closure_linter-2.3.13-r1:20161103-004436.log'
closure_linter-2.3.13-r1: >>> Failed to emerge dev-libs/closure_linter-2.3.13-r1, Log file:
closure_linter-2.3.13-r1: >>>  '/var/log/portage/dev-libs:closure_linter-2.3.13-r1:20161103-004436.log'
closure_linter-2.3.13-r1:
closure_linter-2.3.13-r1:  * Messages for package dev-libs/closure_linter-2.3.13-r1:
closure_linter-2.3.13-r1:
closure_linter-2.3.13-r1:  * Fetch failed for 'dev-libs/closure_linter-2.3.13-r1', Log file:
closure_linter-2.3.13-r1:  *  '/var/log/portage/dev-libs:closure_linter-2.3.13-r1:20161103-004436.log'
=== Complete: job closure_linter-2.3.13-r1 (0m0.7s) ===
Failed dev-libs/closure_linter-2.3.13-r1 (in 0m0.7s). Your build has failed.

And from dev-util/google-web-toolkit:

Started dev-util/google-web-toolkit-2.3.0 (logged in /tmp/google-web-toolkit-2.3.0-6GWuoA)
=== Start output for job google-web-toolkit-2.3.0 (0m0.7s) ===
google-web-toolkit-2.3.0: >>> Emerging (1 of 1) dev-util/google-web-toolkit-2.3.0::chromiumos
google-web-toolkit-2.3.0:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
google-web-toolkit-2.3.0:                                  Dload  Upload   Total   Spent    Left  Speed
google-web-toolkit-2.3.0:
google-web-toolkit-2.3.0:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
google-web-toolkit-2.3.0:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
google-web-toolkit-2.3.0: curl: (22) The requested URL returned error: 404 Not Found
google-web-toolkit-2.3.0:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
google-web-toolkit-2.3.0:                                  Dload  Upload   Total   Spent    Left  Speed
google-web-toolkit-2.3.0:
google-web-toolkit-2.3.0:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
google-web-toolkit-2.3.0:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
google-web-toolkit-2.3.0: curl: (22) The requested URL returned error: 404 Not Found
google-web-toolkit-2.3.0:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
google-web-toolkit-2.3.0:                                  Dload  Upload   Total   Spent    Left  Speed
google-web-toolkit-2.3.0:
google-web-toolkit-2.3.0:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
google-web-toolkit-2.3.0:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
google-web-toolkit-2.3.0: curl: (22) The requested URL returned error: 404 Not Found
google-web-toolkit-2.3.0: !!! Couldn't download 'gwt-2.3.0.zip'. Aborting.
google-web-toolkit-2.3.0:  * Fetch failed for 'dev-util/google-web-toolkit-2.3.0', Log file:
google-web-toolkit-2.3.0:  *  '/var/log/portage/dev-util:google-web-toolkit-2.3.0:20161103-004437.log'
google-web-toolkit-2.3.0: >>> Failed to emerge dev-util/google-web-toolkit-2.3.0, Log file:
google-web-toolkit-2.3.0: >>>  '/var/log/portage/dev-util:google-web-toolkit-2.3.0:20161103-004437.log'
google-web-toolkit-2.3.0:
google-web-toolkit-2.3.0:  * Messages for package dev-util/google-web-toolkit-2.3.0:
google-web-toolkit-2.3.0:
google-web-toolkit-2.3.0:  * Fetch failed for 'dev-util/google-web-toolkit-2.3.0', Log file:
google-web-toolkit-2.3.0:  *  '/var/log/portage/dev-util:google-web-toolkit-2.3.0:20161103-004437.log'
=== Complete: job google-web-toolkit-2.3.0 (0m0.7s) ===
Failed dev-util/google-web-toolkit-2.3.0 (in 0m0.7s). Your build has failed.

These are failing consistently. Tried 3 times. Both ebuilds failed in each run.