Bug#864597: upgrade-reports: jessie -> stretch: gnome fails to upgrade: cycle found while processing triggers

[Bill Allombert]

On Thu, Jun 15, 2017 at 03:16:17PM +0200, Cyril Brulebois wrote:
> Julien Cristau <jcristau at debian.org> (2017-06-15):
> > It sounds like openjdk-8 added two Breaks recently, one or both of
> > which are causing trouble, and none of which fix anything as bad as
> > this.  So I think we should remove the Breaks on tzdata-java from
> > openjdk-8-jdk-headless, and remove the Breaks on ca-certificates-java
> > from openjdk-8-jre-headless.  Would that fix the current issue?
> > 
> > From what I can see #863820 is at most a normal-severity issue.  Not
> > upgrading some packages is way way better than a failed upgrade.
> 
> I'm currently building an updated openjdk-8 with the attached changes
> to see what the upgrade-desktop test cases would look like.
> 
> Note: I've chosen to remove the “Breaks: ${jrehl:Breaks}” line from
> debian/control* so that I'm only touching these files, since d/rules
> seems to only set it to tzdata-java anyway, depending on the target
> dist.
> 
> I'll report the results afterwards, but as mentioned on IRC, even if
> that looks good in the end, fewer than 2 days to become confident it
> won't regress in other cases is really short. :(

It would be really nice if we could remove the circular dependency 
between openjdk-8 and ca-certificate before the release, otherwise
the stretch to buster upgrade will be a nightmare.
It always much easier to add circular dependency than to remove them.

Cheers,
Bill.