I’m using OSX Mojave with zsh and all of sudden I always got an error when opening a new terminal session after doing an upgrade.
dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib Referenced from: /usr/local/bin/awk Reason: image not found
Seems like there’s an error from awk and I found the solution by upgrading gawk
$ brew upgrade gawk
Reference: https://stackoverflow.com/a/40281206/1936697