Comment 6 for bug 1389891

This is my ubuntu+1 chroot, upgraded from release to release for the past 7 years or so.

Yes, it appears that /run/shm has gone missing. That would explain everything.

As a matter of curiosity, which ones of /run/shm or /dev/shm is the current default standard? I'm wondering whether there might have been changes of strategy upstream, as to which one of those two is expected to exist, that could have left me with a dangling symbolic link.