I mark this as fixed released because the current version of the dist- upgrader has a bigger safety buffer that should be enough now.
** Changed in: update-manager (Ubuntu) Status: Needs Info => Fix Released -- Space calculation passes, but out of space crash later https://launchpad.net/bugs/50066 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs