busybox/shell/ash_test/ash-heredoc/heredoc_side_effects.tests

unset a
cat <<EOF >/dev/null
${a=NO}
EOF
echo $a BUG
ash: Expand here-documents in the current shell environment Upstream commit: Date: Sun, 11 Nov 2007 15:27:00 +0800 Expand here-documents in the current shell environment Previously we always expanded here-documents in a subshell. This is contrary to the POSIX specification and how other shells behave. What's more this slows down many expansions due to the extra fork (however, it must be said that it is possible for it speed up certain expansions by running it simultaneously with the command on two CPUs). This patch move the expansion into the current shell environment. Test case: unset a cat <<- EOF > /dev/null ${a=NOT} EOF echo ${a}BAD Old result: BAD New result: NOTBAD Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> 2020-02-23 00:55:03 +05:30			`unset a`
			`cat <<EOF >/dev/null`
			`${a=NO}`
			`EOF`
			`echo $a BUG`