tests/comsub-posix3.sub - platform_external_bash - Gitiles

 # parsing errors before bash-4.2

 a=$(/bin/cat << EOF | wc -l
 a
 b
 c
 EOF
 )

 a=$(cat << EOF | wc -l
 a
 b
 c
 EOF
 )

 a=$(/bin/cat << EOF
 a
 b
 c
 EOF
 )
	# parsing errors before bash-4.2

	a=$(/bin/cat << EOF \| wc -l
	a
	b
	c
	EOF
	)

	a=$(cat << EOF \| wc -l
	a
	b
	c
	EOF
	)

	a=$(/bin/cat << EOF
	a
	b
	c
	EOF
	)