Why source command doesn't work with process substitution in bash 3.2?

Question

I\'ve the following shell script:

cat <(echo foo)
source <(echo bar=bar)
echo $bar

However it works differently in GNU bash 3.2 and 4

Answer 1

This is a known limitation in bash 3.2. To work around it:

source /dev/stdin <<<"$(echo bar=bar)"

...or, similarly:

source /dev/stdin <<<"$(cat <(...))"