The upgrade from jessie-backports to stretch went perfectly. One thing I noticed is that when installing gettext from your repo using `apt install gettext`, it did not include the updated versions of the related libraries (autopoint gettext-base libasprintf-dev libasprintf0c2 libgettextpo-dev libgettextpo0). Only when I did `apt upgrade` did it then upgrade those libs.
Attached is a screenlog of the whole session, from building up the jessie chroot, to installing gettext from your backport, to upgrading to stretch.
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