bash: How do I ensure termination of process substitution used with exec?

Question

If I run

$#/bin/bash
for i in `seq 5`; do
    exec 3> >(sed -e \"s/^/$i: /\"; echo \"$i-\")
    echo foo >&3
    echo bar >&3
    exec 3&         


        

Answer 1

Another user asks the same question, and receives an exhaustive answer here.