Backup failed with an unknown error (line 1414, with_tempdir)

[Simon Volpert]

When running with "DEJA_DUP_DEBUG=1 deja-dup --backup", the backup terminates with the following:

DUPLICITY: INFO 1
DUPLICITY: . retrieving file duplicity-inc.20131223T190216Z.to.20131223T192845Z.vol1.difftar.gpg from location https://files.one.ubuntu.com/content/~/deja-dup/Ghostwheel/duplicity-inc.20131223T190216Z.to.20131223T192845Z.vol1.difftar.gpg

DUPLICITY: INFO 1
DUPLICITY: . making GET request to https://files.one.ubuntu.com/content/~/deja-dup/Ghostwheel/duplicity-inc.20131223T190216Z.to.20131223T192845Z.vol1.difftar.gpg (attempt 1)

DUPLICITY: INFO 1
DUPLICITY: . completed request with status 200 OK

DUPLICITY: INFO 1
DUPLICITY: . Making directory /home/simon-v/.cache/deja-dup/metadata

DUPLICITY: DEBUG 1
DUPLICITY: . Removing still remembered temporary file /var/tmp/duplicity-T8wkmQ-tempdir/mktemp-Gpl2LT-25

DUPLICITY: DEBUG 1
DUPLICITY: . Removing still remembered temporary file /var/tmp/duplicity-T8wkmQ-tempdir/mktemp-7SDL2K-24

DUPLICITY: ERROR 30 AssertionError
DUPLICITY: . Traceback (most recent call last):
DUPLICITY: . File "/usr/bin/duplicity", line 1414, in <module>
DUPLICITY: . with_tempdir(main)
DUPLICITY: . File "/usr/bin/duplicity", line 1407, in with_tempdir
DUPLICITY: . fn()
DUPLICITY: . File "/usr/bin/duplicity", line 1341, in main
DUPLICITY: . restore(col_stats)
DUPLICITY: . File "/usr/bin/duplicity", line 635, in restore
DUPLICITY: . restore_get_patched_rop_iter(col_stats)):
DUPLICITY: . File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 526, in Write_ROPaths
DUPLICITY: . for ropath in rop_iter:
DUPLICITY: . File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 499, in integrate_patch_iters
DUPLICITY: . final_ropath = patch_seq2ropath( normalize_ps( patch_seq ) )
DUPLICITY: . File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 463, in patch_seq2ropath
DUPLICITY: . assert first.difftype != "diff", patch_seq
DUPLICITY: . AssertionError: [(('README',) reg), (('README',) reg), (('README',) reg), (('README',) reg)]
DUPLICITY: .

System information:
Ubuntu 13.10
deja-dup:
  Installed: 27.3.1-0ubuntu1
  Candidate: 27.3.1-0ubuntu1
  Version table:
 *** 27.3.1-0ubuntu1 0
        500 http://il.archive.ubuntu.com/ubuntu/ saucy/main i386 Packages
        100 /var/lib/dpkg/status
duplicity:
  Installed: 0.6.21-0ubuntu4.1
  Candidate: 0.6.21-0ubuntu4.1
  Version table:
 *** 0.6.21-0ubuntu4.1 0
        500 http://il.archive.ubuntu.com/ubuntu/ saucy-updates/main i386 Packages
        100 /var/lib/dpkg/status
     0.6.21-0ubuntu4 0
        500 http://il.archive.ubuntu.com/ubuntu/ saucy/main i386 Packages

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: deja-dup 27.3.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-15.8-lowlatency 3.11.10
Uname: Linux 3.11.0-15-lowlatency i686
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
Date: Mon Dec 23 20:56:29 2013
MarkForUpload: True
SourcePackage: deja-dup
UpgradeStatus: Upgraded to saucy on 2013-12-21 (2 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.