--- snip ---
Unhandled exception in thread started by <function __log_keyring_warning at 0x7fdf90288488>
Traceback (most recent call last):
  File "/usr/share/backintime/common/tools.py", line 1458, in __log_keyring_warning
TypeError: 'NoneType' object is not callable

1456
1457 def __log_keyring_warning():
1458     from time import sleep
1459     sleep(0.1)
1460     logger.warning('import keyring failed')
1461
1462 if keyring is None and keyring_warn:
1463     #delay warning to give logger some time to import
1464     import _thread
1465     _thread.start_new_thread(__log_keyring_warning, ())
1466     # logger.warning('import keyring failed')
1467                                             # <-- this is the last line in the script

Subject: exim paniclog on devuan has non-zero size
To: root@devuan
Message-Id: <E1lsebV-000146-0x@devuan>
From: root <root@devuan>
Date: Mon, 14 Jun 2021 01:53:41 -0300
Status: O

exim paniclog /var/log/exim4/paniclog on devuan has non-zero size, mail system might be broken. Up to 10 lines are quoted below.

2021-06-13 21:21:49 1lsAUd-0001xc-6C == groucho@devuan R=local_user T=mail_spool defer (-1): Tainted '/var/mail/groucho' (file or directory name for mail_spool transport) not permitted
--- snip ---
2021-06-14 01:33:33 1lsX5B-00024J-0o == groucho@devuan R=local_user T=mail_spool defer (-1): Tainted '/var/mail/groucho' (file or directory name for mail_spool transport) not permitted

groucho@devuan:~$ cat /etc/hosts
127.0.0.1        devuan                localhost

#::1              localhost            ip6-localhost ip6-loopback
#fe00::0          ip6-localnet
#fe00::0          ip6-mcastprefix
#fe02::1          ip6-allnodes
#fe02::1          ip6-allrouters
groucho@devuan:~$

groucho@devuan:~$ groups
groucho adm lp mail dialout fax cdrom floppy tape sudo audio dip www-data backup video plugdev staff users crontab netdev lpadmin scanner saned fuse powerdev debian-exim
groucho@devuan:~$ 

groucho@devuan:~$ ls -l /var/mail/groucho
-rw-rw---- 1 groucho mail 20337 Jun 20 09:01 /var/mail/groucho
groucho@devuan:~$ 

groucho@devuan:/var/mail$ sudo exim --version
Exim version 4.94.2 #2 built 26-May-2021 15:52:52
Copyright (c) University of Cambridge, 1995 - 2018
(c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2018
Berkeley DB: Berkeley DB 5.3.28: (September  9, 2013)
Support for: crypteq iconv() IPv6 GnuTLS move_frozen_messages DANE DKIM DNSSEC Event I18N OCSP PIPE_CONNECT PRDR SOCKS TCP_Fast_Open
Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmjz dbmnz dnsdb dsearch nis nis0 passwd
Authenticators: cram_md5 plaintext
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore autoreply lmtp pipe smtp
Fixed never_users: 0
Configure owner: 0:0
Size of off_t: 8
Configuration file search path is /etc/exim4/exim4.conf:/var/lib/exim4/config.autogenerated
Configuration file is /var/lib/exim4/config.autogenerated
groucho@devuan:/var/mail$ 

groucho@devuan:~$ cat /var/lib/exim4/config.autogenerated
#########
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# This file was generated dynamically from
# non-split config (/etc/exim4/exim4.conf.localmacros
# and /etc/exim4/exim4.conf.template).
# The config files are supplemented with package installation/configuration
# settings managed by debconf. This data is stored in
# /etc/exim4/update-exim4.conf.conf
# Any changes you make here will be lost.
# See /usr/share/doc/exim4-base/README.Debian.gz and update-exim4.conf(8)
# for instructions of customization.
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
#########

groucho@devuan:~$ cat /etc/exim4/update-exim4.conf.conf
# /etc/exim4/update-exim4.conf.conf
#
# Edit this file and /etc/mailname by hand and execute update-exim4.conf
# yourself or use 'dpkg-reconfigure exim4-config'
#
# Please note that this is _not_ a dpkg-conffile and that automatic changes   # is it just me or does
# to this file might happen. The code handling this will honor your local     # anyone else read this 
# changes, so this is usually fine, but will break local schemes that mess    # as devspeak for "screw
# around with multiple versions of the file.                                  # you, you are on your own"?
#
# update-exim4.conf uses this file to determine variable values to generate      
# exim configuration macros for the configuration file.
#                       
# Most settings found in here do have corresponding questions in the          # !!!!
# Debconf configuration, but not all of them.                                 # !!!!
#
# This is a Debian specific file

dc_eximconfig_configtype='local'
dc_other_hostnames='groucho'
dc_local_interfaces='127.0.0.1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost=''
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname=''
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'
groucho@devuan:~$ 

/dev/sda: +${execi 60 hddtemp /dev/disk/by-uuid/d6841f29-e39b-4c87-9c52-3a9c3bafe2d3 | cut -c 81-84}
/dev/sdb: +${execi 60 hddtemp /dev/disk/by-uuid/49d1369c-ed70-4543-b0ee-ef65327e101b | cut -c 83-86}
/dev/sdc: +${execi 60 hddtemp /dev/disk/by-uuid/bdf33361-5929-433e-ac7f-1a626aa6e844 | cut -c 78-81}
/dev/sdd: +${execi 60 hddtemp /dev/disk/by-uuid/7a33fda5-abda-451b-b6ef-c17553c78810 | cut -c 83-86}
/dev/sde: +${execi 60 hddtemp /dev/disk/by-uuid/ca8dbded-819d-4e2b-b017-0981a75ea718 | cut -c 101-104}