libcloud version 0.3.1-1 failed to build on i386

libcloud version 0.3.1-1 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2399178

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2399178/+files/buildlog_ubuntu-natty-i386.libcloud_0.3.1-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 964 lines into the build log:

======================================================================
ERROR: test_list_nodes (test.test_softlayer.SoftLayerTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/build/buildd/libcloud-0.3.1/test/test_softlayer.py", line 50, in test_list_nodes
    node = self.driver.list_nodes()[0]
  File "/build/buildd/libcloud-0.3.1/libcloud/drivers/softlayer.py", line 418, in list_nodes
    object_mask=mask
  File "/build/buildd/libcloud-0.3.1/libcloud/drivers/softlayer.py", line 187, in request
    return getattr(sl, method)(*params)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1224, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1575, in __request
    verbose=self.__verbose
  File "/build/buildd/libcloud-0.3.1/test/test_softlayer.py", line 41, in request
    return self._parse_response(resp.body, None)
AttributeError: MockSoftLayerTransport instance has no attribute '_parse_response'

----------------------------------------------------------------------
Ran 180 tests in 0.280s

FAILED (errors=2)
make: *** [debian/stamp-makefile-check] Error 1
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110403-0913
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/libcloud-0.3.1