rql #173719 analysis fails with logilab.constraint [rejected]

to be more specific, rql.analyze.ETypeResolver.visit_relation tries to add a set and a list. With gecode, it is a set and a set and it works.

priorityimportant
typebug
done in0.31.5
load0.000
load left0.000
closed by<not specified>
patchFix type problem raised when using logilab.constraint (closes #173719) [rejected]