> perl -E '@list=("pstree --ascii --arguments --long $$ 1>&2"); system { $list[0] } @list and die $!'
No such file or directory at -e line 1.

> perl -E '@list=("pstree --ascii --arguments --long $$ 1>&2"); exec { $list[0] } @list or die $!'
No such file or directory at -e line 1.

>