Yes, this does no more appear in at least 16.04 Xenial. And Xenial has procps 3.3.10 which should have fixed this issue. Hence closing. Thanks for the hint.
** Changed in: procps (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1055551 Title: zsh can causes ps to generate error message To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1055551/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs