Do not assume existence of any non-special parameters in exec-env.

[BradenM]

When executing exec-env with bash's nounset flag enabled, it fails with multiple unbound variable errors.

-u Treat unset variables and parameters other than
the special parameters "@" and "*" as an error
when performing parameter expansion. If expansion
is attempted on an unset variable or parameter,
the shell prints an error message, and, if not
interactive, exits with a non-zero status.

see: https://man7.org/linux/man-pages/man1/bash.1.html

This is the case when using asdf-postgres with asdf-direnv with direnv configured as strict_env=true (which execs bash with: set -euo pipefail).

See the original issue here for details:
asdf-community/asdf-direnv#115

Thanks!

[smashedtoatoms]

Wild, I would have never thought to check for this.