how to fail on first error when using bash as a template tool

I am looking for a better version of set -e. That better version should just work™. I briefly read [BashFaq/105](http://mywiki.wooledge.org/BashFAQ/105) and tried [this insane approach](https://fvue.nl/wiki/Bash:_Error_handling#Solutions_revisited:_Combining_the_tools) , but I still do not know how to fail on error. My use case is that I would like to generate a text file from a template like this:

#!/usr/bin/env bash

# none of these options helped to get the behavior I want: stop on first error
# set -euo pipefail
# shopt -s inherit_errexit
# set -o errexit
# trap ERR

cat 

MYAPP_DATABASE_PASSWORD=

MYAPP_USER_PASSWORD=

MYAPP_CONFIGURATION_DATE=

if there is a typo in SecureRandom then erb immediately exits with a failure. **How to achieve this crash-on-failure behavior with bash?**