1 2failures=0 3 4check() { 5 if [ "$2" != "$3" ]; then 6 echo "Failure at $1" >&2 7 failures=$((failures + 1)) 8 fi 9} 10 11check $LINENO "$(trap "echo bye" EXIT; : >/dev/null)" bye 12check $LINENO "$(trap "echo bye" EXIT; { :; } >/dev/null)" bye 13check $LINENO "$(trap "echo bye" EXIT; (:) >/dev/null)" bye 14check $LINENO "$(trap "echo bye" EXIT; (: >/dev/null))" bye 15check $LINENO "$(${SH} -c 'trap "echo bye" EXIT; : >/dev/null')" bye 16check $LINENO "$(${SH} -c 'trap "echo bye" EXIT; { :; } >/dev/null')" bye 17check $LINENO "$(${SH} -c 'trap "echo bye" EXIT; (:) >/dev/null')" bye 18check $LINENO "$(${SH} -c 'trap "echo bye" EXIT; (: >/dev/null)')" bye 19 20exit $((failures > 0)) 21