Also happening for me on Debian sid, but I unfortunately don't have a prior kernel version to fall back on. fsck reports that the device is clean, no issues.
- Bug#932935: System refuses to boot, logsave not found -... Bjoern Schiessle
- Bug#932935: System refuses to boot, logsave not fo... mg-devin
- Bug#932935: System refuses to boot, logsave not fo... Trevor Bekolay
- Bug#932935: Christopher Obbard
- Bug#932935: Fixed mg-devin
- Bug#932935: (No Subject) Joshua W. Lawson