Bash 5.2.0: Memory leak with $(<file)

[pourko]

For demonstration, put a $(<file) construct inside a loop, and the leak becomes 
very noticeable:
###################
echo 1 >/tmp/file
while :;do
  var=$(</tmp/file)
done
###################
The bug is not present in bashes before 5.2.0.

-- 
Pourko