Bug#809655: aptitude: harrowing upgrade for the perl transition

[gregor herrmann]

On Sat, 02 Jan 2016 20:53:56 +0800, Paul Wise wrote:

> Package: aptitude
> Version: 0.7.5-3
> Severity: normal
> X-Debbugs-CC: perl at packages.debian.org
> 
> I had a very harrowing upgrade for the perl transition. The first
> upgrade managed to remove perl-base somehow and failed spectacularly.
> The second and third upgrades also failed but less so and the fourth
> upgrade succeeded. I was doing the upgrade in the aptitude console UI
> and didn't (AFAIR) select the removal of perl-base.

Just as a data point:
I've successfully updated perl 5.22 on 2 unstable machines with the
aptitude TUI 2 weeks ago, but I can't remember how much I had to help
aptitude (that was still during the binNMU phase).

Today I updated 2 testing machines (disclaimer: raspbian, but I'm not
aware of any difference in either aptitude or perl) to perl 5.22
again with the aptitude TUI, and I watched closesly:
- Both upgrades succeeded.
- In both cases aptitude's first solution was to keep everything; the
  second solution was the correct one: remove the old perl-modules
  and libperl5.20 and install/upgrade the rest.
- In both cases perl-base was upgraded.
- On one machine perl-base was marked as automatically installed
  before, on the other as manually installed, so that doesn't make a
  difference.

Unfortunately this doesn't tell us what went wrong for pabs but at
least it might be a hint that not everything is horribly broken :)


Cheers,
gregor

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