Comment 11 for bug 1767527

TJ, some new information - this is a regression. Trying the EXACT same install path with the "complex" passphrase I usually use on an old bionic "daily" build worked perfectly. I was able to boot into the system and setup my applications. I'd rather not wipe it right now, but something broke between the official 18.04 build and this one:

dtaylor@dylantaylor-pc:~/Downloads$ md5sum bionic-desktop-amd64.iso
9cf2ab79a6cb8fd3cdefc34e7d1a9841 bionic-desktop-amd64.iso
dtaylor@dylantaylor-pc:~/Downloads$ stat bionic-desktop-amd64.iso
  File: bionic-desktop-amd64.iso
  Size: 1829273600 Blocks: 3572816 IO Block: 4096 regular file
Device: fd02h/64770d Inode: 19008339 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ dtaylor) Gid: ( 1000/ dtaylor)
Access: 2018-04-27 19:52:52.751664153 -0400
Modify: 2018-04-04 14:37:45.311616468 -0400
Change: 2018-04-25 13:51:20.865647567 -0400
 Birth: -