Public bug reported:
Duplicity suddenly fails when I run an old backup script, that I have
used unchanged for two months.
I expected to backup to succeed and not give an error message.
The error message I got is:
```
TypeError: can only concatenate str (not "bytes") to str
```
And in context:
```
Added incremental Backupset (start_time: Fri Oct 18 19:18:20 2019 / end_time:
Tue Oct 22 17:18:24 2019)
Local and Remote metadata are synchronized, no sync needed.
Last full backup date: Mon Sep 23 16:44:18 2019
Attempt 1 failed. TypeError: can only concatenate str (not "bytes") to str
Attempt 2 failed. TypeError: can only concatenate str (not "bytes") to str
Attempt 3 failed. TypeError: can only concatenate str (not "bytes") to str
Attempt 4 failed. TypeError: can only concatenate str (not "bytes") to str
Giving up after 5 attempts. TypeError: can only concatenate str (not "bytes")
to str
Cleanup of temporary directory /tmp/duplicity-tvzschy0-tempdir failed - this is
probably a bug.
```
It is possible, that this is an interaction with the Backblaze B2
package "b2", however, I tried to install older versions of that package
by doing:
```
pip3 install b2==1.3.0
pip3 install b2==1.2.0
pip3 install b2==1.1.0
```
But in each version the error remained the same. (No "b2" package is
installed via apt or the python2 pip. Interestingly when I have only the
python-2 b2 package installed, duplicity complains that the package is
not present at all, so I guess duplicity changed to python3 now.)
Versions:
Ubuntu: 19.10
duplicity: 0.8.04-2ubuntu1
b2 Python Package: 1.4.2
** Affects: duplicity (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1850059
Title:
Backup (B2-Backend) fails with 'TypeError: can only concatenate str
(not "bytes") to str'
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