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[Michael Terry <michael.terry@xxxxxxxxxxxxx>]

Since I work with Steve Magoun and he was generous enough to provide me
a copy of his backup data, I've been able to reproduce this.  Looking
into it now.

** Changed in: duplicity
       Status: New => Confirmed

** Changed in: duplicity
     Assignee: (unassigned) => Michael Terry (mterry)

** Changed in: duplicity
       Status: Confirmed => In Progress

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https://bugs.launchpad.net/bugs/835892

Title:
  duplicity crash: "AssertionError: rb None None"

Status in Déjà Dup Backup Tool:
  New
Status in Duplicity - Bandwidth Efficient Encrypted Backup:
  In Progress
Status in “deja-dup” package in Ubuntu:
  Confirmed

Bug description:
  Traceback (most recent call last):
    File "/usr/bin/duplicity", line 1262, in <module>
      with_tempdir(main)
    File "/usr/bin/duplicity", line 1255, in with_tempdir
      fn()
    File "/usr/bin/duplicity", line 1237, in main
      incremental_backup(sig_chain)
    File "/usr/bin/duplicity", line 479, in incremental_backup
      bytes_written = dummy_backup(tarblock_iter)
    File "/usr/bin/duplicity", line 161, in dummy_backup
      while tarblock_iter.next():
    File "/usr/lib/python2.7/dist-packages/duplicity/diffdir.py", line 505, in next
      result = self.process(self.input_iter.next(), size)
    File "/usr/lib/python2.7/dist-packages/duplicity/diffdir.py", line 208, in get_delta_iter
      (new_path, sig_path, sigTarFile))
    File "/usr/lib/python2.7/dist-packages/duplicity/robust.py", line 37, in check_common_error
      return function(*args)
    File "/usr/lib/python2.7/dist-packages/duplicity/diffdir.py", line 126, in get_delta_path
      old_sigfp = sig_path.open("rb")
    File "/usr/lib/python2.7/dist-packages/duplicity/path.py", line 156, in open
      "%s %s %s" % (mode, self.fileobj, self.opened)
  AssertionError: rb None None

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: deja-dup 18.1.1-0ubuntu1.1
  ProcVersionSignature: Ubuntu 2.6.38-11.48-generic-pae 2.6.38.8
  Uname: Linux 2.6.38-11-generic-pae i686
  NonfreeKernelModules: nvidia
  Architecture: i386
  CheckboxSubmission: 1ac9995abbd9123cea98763317e72e22
  CheckboxSystem: 0ede5de78dbf0a79de4ac93c88c84721
  Date: Sun Aug 28 01:12:23 2011
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: deja-dup
  UpgradeStatus: Upgraded to natty on 2011-04-23 (126 days ago)

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