The testcase here doesn't seem to be working (or, rather, failing) for me, which makes it harder to investigate this. It passes on both sid and eoan for me:
(sid-amd64)root@nosferatu:~# dpkg -l \*klibc\* Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-==============-============-============-=============================================== ii klibc-utils 2.0.7-1 amd64 small utilities built with klibc for early boot ii libklibc:amd64 2.0.7-1 amd64 minimal libc subset for use with initramfs (sid-amd64)root@nosferatu:~# /usr/lib/klibc/bin/losetup -vf Loop device is /dev/loop0 /dev/loop0 (sid-amd64)root@nosferatu:~# (eoan-amd64)root@nosferatu:~# dpkg -l \*klibc\* Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-==============-==============-============-=============================================== ii klibc-utils 2.0.6-1ubuntu2 amd64 small utilities built with klibc for early boot ii libklibc:amd64 2.0.6-1ubuntu2 amd64 minimal libc subset for use with initramfs (eoan-amd64)root@nosferatu:~# /usr/lib/klibc/bin/losetup -vf Loop device is /dev/loop0 /dev/loop0 (eoan-amd64)root@nosferatu:~# -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1850184 Title: losetup -f broken in 2.0.6-1ubuntu2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gcc-9/+bug/1850184/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs