When writing bash shellscripts, I always set options "set -ueC" for strict error checking. However, loading pyvenv's activate and deactivate scripts from bash with "-u" option, they are failure because they may refer undefined shell variables.

I hope activate script and deactivate function are enclosed like following block

_OLD_BASH_OPTIONS="$-"
set +u

### script body ##

set -$_OLD_BASH_OPTIONS
unset _OLD_BASH_OPTIONS


Another option, all shell-variables in the script change like

$SPAM -> ${SPAM:-}