darcs version 2.5.2-2 failed to build in oneiric

darcs version 2.5.2-2 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2691089

Details about the rebuild:
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20110816-oneiric.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2691089/+files/buildlog_ubuntu-oneiric-amd64.darcs_2.5.2-2_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1637 lines into the build log:

Running issue1618-amend-preserve-logfile.sh ... passed.
Running issue1620-record-lies-about-leaving-logfile.sh ... passed.
Running issue1636-match-hunk.sh ... passed.
Running issue1645-ignore-symlinks-case-fold.sh ... passed.
Running issue1645-ignore-symlinks.sh ... passed.
Running issue1726_darcs_always-boring.sh ... passed.
Running issue1739-escape-multibyte-chars-correctly.sh ... skipped.
Running issue1749-rmdir.sh ... passed.
Running issue174_obliterate_before_a_tag.sh ... passed.
Running issue1756_moves_index.sh ... passed.
Running issue1763-pull-fails-on-non-ascii-filenames.sh ...Setup: interrupted
make[1]: *** [override_dh_auto_test] Error 1
make[1]: Leaving directory `/build/buildd/darcs-2.5.2'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110820-0701
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/darcs-2.5.2