The upstream bug now has the proposed solution to rename the identifier to "_apt_file".
I'm taking the liberty to mark this as "Confirmed" since Debian also has it. Would still be interesting to know under what circumstances exactly you could repro this. ** Changed in: apt-file (Ubuntu) Status: Incomplete => Confirmed ** Also affects: apt-file (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=441041 Importance: Unknown Status: Unknown -- `_apt-file': not a valid identifier https://bugs.launchpad.net/bugs/173057 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs