It looks like partman went off the rails, likely starting with partman-
crypto.
** Package changed: ubiquity (Ubuntu) => partman-crypto (Ubuntu)
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https://bugs.launchpad.net/bugs/1619969
Hard power off and a second install keeping only to the defaults worked.
What I was trying to do the first time was add more swap that was there
by default. I guess if I really want to do that now I can fiddle with
it in LVM.
So I probably goofed something up when manually partitioning, but the
e