Unhandled exception with BB_SIGNATURE_HANDLER="noop"

Hi,

on the autobuilder I use, this error is currently blocking all nightly
builds for some time:
http://pastebin.com/RN6nJyPh

The build is a normal nightly world build (these srcrevs are from 2013/08/01)
$ bitbake -k world

meta-angstrom     = "master:bed0c8c6abbf90aaaa730617a465839fde4374d2"
meta-oe         = "master:246bedc1c6b3e2830ca0a8fae8c30b8624f46ab2"
meta-ti           = "master:3f3f05eea39d0f13bc140747984e202e9288b2fe"
meta-gumstix-community = "master:75dba51592cba66ff42c287d88b670852b767336"
meta              = "master:f192c444c2d88c49738bea4ff4c3af0cc72916de"


In the local.conf these settings are used:
# Disable shared state creation
SSTATE_CREATE_PKG = "0"
BB_SIGNATURE_HANDLER = "noop"


In siggen.py the "noop" object has no variable file_checksum_values.

What is the preferred way to resolve this?


-- 
Regards
Samuel