Deja Dup Crashes Before Backup Can Finish

[Matt G.]

DUPLICITY: INFO 1
DUPLICITY: . GPG error detail: Traceback (innermost last):
DUPLICITY: . File "/usr/bin/duplicity", line 1555, in <module>
DUPLICITY: . with_tempdir(main)
DUPLICITY: . File "/usr/bin/duplicity", line 1541, in with_tempdir
DUPLICITY: . fn()
DUPLICITY: . File "/usr/bin/duplicity", line 1393, in main
DUPLICITY: . do_backup(action)
DUPLICITY: . File "/usr/bin/duplicity", line 1414, in do_backup
DUPLICITY: . sync_archive()
DUPLICITY: . File "/usr/bin/duplicity", line 1204, in sync_archive
DUPLICITY: . copy_to_local(fn)
DUPLICITY: . File "/usr/bin/duplicity", line 1150, in copy_to_local
DUPLICITY: . copy_raw(src_iter, tdp.name)
DUPLICITY: . File "/usr/bin/duplicity", line 1068, in copy_raw
DUPLICITY: . data = src_iter.next().data
DUPLICITY: . File "/usr/bin/duplicity", line 1132, in next
DUPLICITY: . self.fileobj.close()
DUPLICITY: . File "/usr/lib/python2.7/dist-packages/duplicity/dup_temp.py", line 227, in close
DUPLICITY: . assert not self.fileobj.close()
DUPLICITY: . File "/usr/lib/python2.7/dist-packages/duplicity/gpg.py", line 305, in close
DUPLICITY: . self.gpg_failed()
DUPLICITY: . File "/usr/lib/python2.7/dist-packages/duplicity/gpg.py", line 272, in gpg_failed
DUPLICITY: . raise GPGError(msg)
DUPLICITY: . GPGError: GPG Failed, see log below:
DUPLICITY: . ===== Begin GnuPG log =====
DUPLICITY: . gpg: WARNING: "--no-use-agent" is an obsolete option - it has no effect
DUPLICITY: . gpg: AES256 encrypted data
DUPLICITY: . gpg: encrypted with 1 passphrase
DUPLICITY: . gpg: decryption failed: Bad session key
DUPLICITY: . ===== End GnuPG log =====
DUPLICITY: .
DUPLICITY: .

DUPLICITY: ERROR 31 GPGError
DUPLICITY: . GPGError: GPG Failed, see log below:
DUPLICITY: . ===== Begin GnuPG log =====
DUPLICITY: . gpg: WARNING: "--no-use-agent" is an obsolete option - it has no effect
DUPLICITY: . gpg: AES256 encrypted data
DUPLICITY: . gpg: encrypted with 1 passphrase
DUPLICITY: . gpg: decryption failed: Bad session key
DUPLICITY: . ===== End GnuPG log =====
DUPLICITY: .

Duplicity version: 0.7.17
Python version: 2.7.15rc1
OS Distro and version: Ubuntu 18.04

[Matt G. (muddpup64)]

I honestly have no more to give to this. The application simply runs for a little bit (checking what files have changed) and then crashes giving no error message. This message is from the "DEJA_DUP_DEBUG=1" command prefix.

[Matt G. (muddpup64)]

I believe this bug is related to an update that happened sometime in the end of December. I do not know which one however.

[Matt G. (muddpup64)]

I do not know where to start in troubleshooting this. Perhaps I could at least be pointed in the right direction.