[Pkg-mailman-hackers] Bug#1003247: workaround / Re: Bug#1003247: mailman3-web: Mailman3 not working following distribution upgrade from Debian 10 to 11.

[Joost van Baal-Ilić]

On Thu, Jan 06, 2022 at 06:14:26PM -0500, Gordon Dickens wrote:
> Package: mailman3-web
> Version: 0+20200530-2
> Severity: important
> 
> Dear Maintainer,
> 
> I performed a distribution upgrade from Debian 10 Buster (which runs mailman
> 3.2.1) to Debian 11 Bullseye (which runs mailman 3.3.1) with the command
> "apt-get full-upgrade -y" and everything apparently worked properly except at
> the end of the upgrade when the following error dialog was generated by the
> mailman3-web and mailman3-full post-installation scripts:
> 
> Setting up mailman3-web (0+20200530-2) ...
> Determining localhost credentials from /etc/mysql/debian.cnf: succeeded.
> dbconfig-common: writing config to /etc/dbconfig-common/mailman3-web.conf
> dbconfig-common: flushing administrative password
> sed: -e expression #2, char 77: unterminated `s' command
> dpkg: error processing package mailman3-web (--configure):
>  installed mailman3-web package post-installation script subprocess returned
>  error exit status 1
> dpkg: dependency problems prevent configuration of mailman3-full:
>  mailman3-full depends on mailman3-web; however:
>   Package mailman3-web is not configured yet.
> 
> dpkg: error processing package mailman3-full (--configure):
>  dependency problems - leaving unconfigured
> Errors were encountered while processing:
>  mailman3-web
>  mailman3-full
> E: Sub-process /usr/bin/dpkg returned an error code (1)
> 
<snip>
> 
> So, I am now stuck
<snip>
> 
> Does anybody have any idea how to fix this?  I would very much appreciate some suggestions.
> 

Not a fix, but a _very_ _dirty_ workaround:

 sudo mv /var/lib/dpkg/info/mailman3-web.postinst /var/lib/dpkg/info/mailman3-web.postinst.disabled

(Only do this if everything else failed.) After that, try the install again by
running

 sudo apt-get -f install

.  Your can now do dpkg/apt stuff again.  However, you'll have to manually
execute all the needed things /var/lib/dpkg/info/mailman3-web.postinst was
trying to achieve: have a look at that script.

HTH, Bye,

Joost