Bug#823906: apt-cudf: unable to find a solution with an out-of-date chroot

[Ralf Treinen <treinen@free.fr>]

Hi,

On Tue, May 10, 2016 at 11:18:56AM +0200, Aurelien Jarno wrote:

> We use sbuild wit the cudf resolver on the build daemons, with the
> following optimization criteria:
> 
>   $aspcud_criteria = '-removed,-changed,-new,-count(solution,APT-Release:=/experimental/)';
> 
> Unfortunately this doesn't work when the available packages are newer
> than the one installed in the chroots.

That is very strange. As a first remark, the optimisation criterion should
not be at stake here. The optimisation criterion cannot make the search for
a solution fail in case there is a solution, the criterion only
serves to decide which solution to select in case there are several
solutions.

> This can also be reproduced using the following command:
> 
> | apt-get --solver aspcud -o 'APT::Solver::Strict-Pinning=false' -o 'APT::Solver::aspcud::Preferences=-removed,-changed,-new,-count(solution,APT-Release:=/experimental/)' build-dep qgis

A quick test on my home machine does not reproduce the error. Anyway, I guess
you have to specify that you want to satisfy the build-dependencies of
qgis/experimental, I guess ?

I'll ask on the dose developers list.

Thanks for your bug report -Ralf.