The revision 64600 was the merge of next into the branch
features/Aos_2-new_functors-tau. For an unknown reason (maybe a buggy svn
version), that merge forgot to apply some revision of next. And those
revision were thus cancelled when the branch has been reintegrated back
into next.
I am trying to fix that. This branch is a copy of the branch
features/Aos_2-new_functors-tau@64599 where the merge of next has been
reapplied. Let's see what are the differences with the buggy revision
64000.