Pattern: Missing use of done < <(cmd)
Issue: -
ShellCheck found a done keyword followed by a process substitution, e.g. done <(cmd).
The intention was most likely to redirect from this process substitution, in which case you will need one extra <: done < <(cmd).
This is because <(cmd) expands to a filename (e.g. /dev/fd/63), and you need a < to redirect from filenames.
Example of incorrect code:
sum=0
while IFS="" read -r n
do
(( sum += n ))
done <(file) Example of correct code:
sum=0
while IFS="" read -r n
do
(( sum += n ))
done < <(file)