On Monday, September 28, 2020, 03:36:17 AM GMT+1, Bart Schaefer wrote: >Something else funny is happening here.  This is defining /bin/ls as a >function with body "echo foo", as if the "|" were not present in the >command at all. > >Try using "set -x" (or "setopt xtrace" if you prefer) before the first >attempt to pipe. After spending some time fiddling with my ~/.zshrc config file I found the culprit: eval "$(fasd --init zsh-hook)" I've submitted a bug report to the fasd repo: https://github.com/clvv/fasd/issues/156