bash is cool

bad.sh

#!/bin/bash
set -euo pipefail
set -x

if [ ! -z "$(echo foo)"]; then
  echo "we should never get here"
  exit 1
fi

echo "we should never get here either"

output

$ bash bad.sh
++ echo foo
+ '[' '!' -z 'foo]'
bad.sh: line 5: [: missing `]'
+ echo 'we should never get here either'
we should never get here either