Bug#671929: ccache: trigger not multi-arch safe, prevents proper gcc upgrade

[Sven Joachim <svenjoac@gmx.de>]

On 2012-05-09 22:10 +0200, Yann Dirson wrote:

> On Wed, May 09, 2012 at 08:54:18PM +0200, Joel Rosdahl wrote:
>> Hi,
>> 
>> I don't see anything in the triggered ccache postinst script that could
>> cause this.
>> 
>> Can you reproduce the problem?
>
> Well, it was systematic, and I have now purged the 3 foreign packages
> remaining from my first experiment with multi-arch - so things are now
> back in order.
>
> I suspect that the way to reproduce would be:
>
> * downgrade eg. libgcc1
> * activate multiarch
> * install foreign libgcc1 (thus same version)
> * upgrade native libgcc1 (possibly while same foreign version still unavail,
>   or make it unavail by disabling foreign ach in apt.conf ?)

This is not supposed to be possible, it only happens because of
#670668.

Cheers,
       Sven