[debian-mysql] Bug#853008: mysql-server-5.7: purge could delete mariadb-server files with inadequate warning

[Julian Gilbey]

On Sat, Jan 28, 2017 at 09:21:13PM +0000, Julian Gilbey wrote:
> Package: mysql-server-5.7
> Version: 5.7.16-2
> Severity: serious
> 
> Hello!
> 
> I'm really confused by the change in the postrm introduced in response
> to LP: #1602945, and I simply do not understand the rationale of the
> original bug report, and the comment there (and in the git commit log)
> that "Remove the check on the server binary, since it shouldn't be
> possible for another package to own that file anyway" is clearly
> incorrect: during a postrm remove|purge run, if that file exists -
> which it may well do, it will certainly belong to a different package,
> such as mysql-server-5.8 or mariadb-server-10.1.

And looking at the existing postrms, I see that this is effectively
just Debian bug #307473 reopened.  That was regarded as critical!

Best wishes,

   Julian