merge-upstream tarball results in ERROR: [Errno 2] No such file or directory

$ bzr merge-upstream ../hello_2.4.orig.tar.gz --package hello --version 2.4-1
No distribution specified, and no changelog, assuming 'debian'
bzr: ERROR: [Errno 2] No such file or directory

I'm using the tip of builddeb trunk - 393.

I've runt the test-suite got 1 error:

(It used by global config in the test don't know whether this is expected....)

$ bzr test-builddeb
bzr selftest: /usr/bin/bzr
   /usr/lib/python2.6/dist-packages/bzrlib
   bzr-2.1.0dev5 python-2.6.4 Linux-2.6.31-18-generic-i686-with-Ubuntu-9.10-karmic

======================================================================
FAIL: test_contents_taken_from_export (bzrlib.plugins.builddeb.tests.blackbox.test_do.TestDo)
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_StringException: Text attachment: log
------------
80.266 creating repository in file:///tmp/testbzr-Fztzse.tmp/bzrlib.plugins.builddeb.tests.blackbox.test_do.TestDo.test_contents_taken_from_export/work/.bzr/.
80.269 creating branch <bzrlib.branch.BzrBranchFormat7 object at 0x9cf250c> in file:///tmp/testbzr-Fztzse.tmp/bzrlib.plugins.builddeb.tests.blackbox.test_do.TestDo.test_contents_taken_from_export/work/.bzr/
80.280 trying to create missing lock '/tmp/testbzr-Fztzse.tmp/bzrlib.plugins.builddeb.tests.blackbox.test_do.TestDo.test_contents_taken_from_export/work/.bzr/checkout/dirstate'
80.280 opening working tree '/tmp/testbzr-Fztzse.tmp/bzrlib.plugins.builddeb.tests.blackbox.test_do.TestDo.test_contents_taken_from_export/work'
80.293 run bzr: ['bd-do', 'echo a > debian/changelog']
80.293 bzr arguments: ['bd-do', 'echo a > debian/changelog']
80.294 encoding stdout as sys.stdout encoding 'UTF-8'
80.299 opening working tree '/tmp/testbzr-Fztzse.tmp/bzrlib.plugins.builddeb.tests.blackbox.test_do.TestDo.test_contents_taken_from_export/work'
80.303 Using True for merge, taken from default.conf
80.304 Using 'debian/changelog' to get package information
80.305 Using /home/dmitrij/src/build-dir for build-dir, taken from /home/dmitrij/.bazaar/builddeb.conf
80.305 Using /home/dmitrij/src/.tarballs for orig-dir, taken from /home/dmitrij/.bazaar/builddeb.conf
    INFO Looking for a way to retrieve the upstream tarball
    INFO Using apt to look for the upstream tarball.
    INFO apt could not find the needed tarball.
    INFO No debian/rules file to try and use for a get-orig-source rule
    INFO No watch file to use to retrieve upstream tarball.
80.650 Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1131, in run_bzr_catch_user_errors
    return run_bzr(argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1027, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 638, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/dmitrij/.bazaar/plugins/builddeb/cmds.py", line 810, in run
    builder.export()
  File "/home/dmitrij/.bazaar/plugins/builddeb/builder.py", line 75, in export
    self.distiller.distill(self.target_dir)
  File "/home/dmitrij/.bazaar/plugins/builddeb/source_distiller.py", line 83, in distill
    self._distill(target)
  File "/home/dmitrij/.bazaar/plugins/builddeb/source_distiller.py", line 124, in _distill
    tarball = self.upstream_provider.provide(parent_dir)
  File "/home/dmitrij/.bazaar/plugins/builddeb/upstream.py", line 402, in provide
    raise MissingUpstreamTarball(self._tarball_name())
MissingUpstreamTarball: Unable to find the needed upstream tarball: test_0.1.orig.tar.gz.

80.650 errors:
'Looking for a way to retrieve the upstream tarball\nUsing apt to look for the upstream tarball.\napt could not find the needed tarball.\nNo debian/rules file to try and use for a get-orig-source rule\nNo watch file to use to retrieve upstream tarball.\nbzr: ERROR: Unable to find the needed upstream tarball: test_0.1.orig.tar.gz.\n'
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Text attachment: traceback
------------
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/testtools/runtest.py", line 128, in _run_user
    return fn(*args)
  File "/usr/lib/python2.6/dist-packages/testtools/testcase.py", line 368, in _run_test_method
    testMethod()
  File "/home/dmitrij/.bazaar/plugins/builddeb/tests/blackbox/test_do.py", line 153, in test_contents_taken_from_export
    self.run_bzr(['bd-do', 'echo a > debian/changelog'])
AssertionError: Unexpected return code
not equal:
a = 0
b = 3

------------

----------------------------------------------------------------------
Ran 264 tests in 79.207s

FAILED (failures=1)