Let's gradually convert our scripts to use: ``` set -e set -u set -o pipefail ``` And maybe: ``` IFS=$'\n\t' ``` These settings help catch common errors in bash scripts at runtime: http://redsymbol.net/articles/unofficial-bash-strict-mode/ (Shellcheck helps us catch errors while writing scripts, but it can't help with runtime failures.) Follow-up to legacy/trac#33451.