[johncs]

I set failglob: `shopt -s failglob`. Makes the whole command fail if there's no matches. That combined with `set -e` which aborts the script in the event of any command failing makes me feel somewhat safe.

Indeed I add the following two lines to every bash script I write:

    set -exu
    shopt -s failglob

[nothrabannosir]

If you like set -e, I recommend looking at set -o pipefail.