Public bug reported: This may be related to bug 46839 (not sure).
Basically, the installer crashed while it was re-creating the partition and creating an XFS file system on it. I manually created using fdisk and mkfs.xfs. And will re-start installation. ** Affects: ubiquity (Ubuntu) Importance: Untriaged Status: Unconfirmed -- Crashed when adding partition and creating XFS FS. https://launchpad.net/bugs/53703 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs