du command completion is broken after latest zsh update: it doesn't try to substitude files and directories any more, e.g. typing `du <space> <tab>` prints `-` and tries command line flag completion, while it should do file/directory completion, roughly like `ls <space> <tab>` would do.
Yeah I figured out and I am working on it
A commit references this bug:
Date: Mon Jun 15 12:36:14 UTC 2015
New revision: 389703
Fix du(1) completion
Obtained from: ZSH upstream