Via eadler@ on phabricator review:
(a) some of you have experienced brokeness with arc recently. This is
due to a bug in cURL: cURL 7.43 has a bug where "Content-Length" is
incorrectly cached between requests on the same connection, which
breaks the 2nd..Nth request when connections are reused. Recent
versions of libphutil work around the issue (the port update is here:
https://reviews.freebsd.org/D2894). In the meantime either downgrade
cURL to a version earlier than 7.43.0, upgrade cURL to HEAD, or wait
for 7.43.1 and upgrade cURL.
A commit references this bug:
Date: Fri Jun 26 10:12:45 UTC 2015
New revision: 390625
Update devel/arcanist, devel/libphutil, devel/phabricator to 20150626.
This should fix a couple of issues (including a problem caused
by a bug curl 7.43).
Note that differential revision points to an earlier
patch (but it's related, so I think that's fine).
Differential Revision: https://reviews.freebsd.org/D2894
Approved by: mentors (implicit)