buildbot failure in Mercurial on hg tests (stable)

[hgbuildbot at kublai.com]

The Buildbot has detected a new failure on builder hg tests (stable) while building hg.
Full details are available at:
 http://hgbuildbot.kublai.com/builders/hg%20tests%20%28stable%29/builds/305

Buildbot URL: http://hgbuildbot.kublai.com/

Buildslave for this Build: p64.osuosl.test

Build Reason: scheduler
Build Source Stamp: [branch stable] 61c8327ced503bf7a1996337af711e0f4a58d4c0
Blamelist: FUJIWARA Katsunori <foozy at lares.dti.ne.jp>

BUILD FAILED: failed http2

sincerely,
 -The Buildbot