No, it is not. It is a corrupted filesystem. If you can reproduce such an error on a *clean* filesystem, then it might be a bug. But, until you can do that, there is nothing to be done here.
Marking OPINION. You can comment, if you want, on why you feel a corrupted filesystem should imply a failure on df/du/etc. ** Changed in: coreutils (Ubuntu) Status: New => Opinion -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1186442 Title: df says / out of space but isn't To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/coreutils/+bug/1186442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs