As one test I changed the Regional Format to "English (Denmark)" so that numbers are 1.234.567,89 and then upgraded to yakkety using DistUpgradeViewGtk3. I did not encounter a crash.
bdmurray@clean-xenial-amd64:~$ env | grep LC_ LC_PAPER=en_DK.UTF-8 LC_ADDRESS=en_DK.UTF-8 LC_MONETARY=en_DK.UTF-8 LC_NUMERIC=en_DK.UTF-8 LC_TELEPHONE=en_DK.UTF-8 LC_IDENTIFICATION=en_DK.UTF-8 LC_MEASUREMENT=en_DK.UTF-8 LC_CTYPE=en_US.UTF-8 LC_TIME=en_DK.UTF-8 LC_NAME=en_DK.UTF-8 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633219 Title: Upgrade to yakkety fails due to non-us locale To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1633219/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs