There is a syntax error in a redirection: $ bash -x utils/ipset_bash_completion/ipset + shopt -s extglob utils/ipset_bash_completion/ipset: line 365: syntax error near unexpected token `(' utils/ipset_bash_completion/ipset: line 365: `done < <(PATH=${PATH}:/sbin ( command ip -o link show ) 2>/dev/null)' Move the environment variable assignment into the sub-shell. This fix was previously applied in commit 417ee1054fb2 ("bash-completion: fix syntax error"), but then reverted, presumably by mistake, in commit 0378d91222c1 ("Bash completion utility updated"). Fixes: 0378d91222c1 ("Bash completion utility updated") Signed-off-by: Jeremy Sowden <jeremy@xxxxxxxxxx> --- utils/ipset_bash_completion/ipset | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/utils/ipset_bash_completion/ipset b/utils/ipset_bash_completion/ipset index d258be234806..fc95d4043865 100644 --- a/utils/ipset_bash_completion/ipset +++ b/utils/ipset_bash_completion/ipset @@ -362,7 +362,7 @@ _ipset_get_ifnames() { while read -r; do REPLY="${REPLY#*: }" printf "%s\n" ${REPLY%%:*} -done < <(PATH=${PATH}:/sbin ( command ip -o link show ) 2>/dev/null) +done < <(( PATH=${PATH}:/sbin command ip -o link show ) 2>/dev/null) } _ipset_get_iplist() { -- 2.47.2