declare -n r
declare -n r
unset -n r

r=foo
declare -n r=/

r=%
declare -n r
unset r

declare -n r
r=^
declare -p r

unset -n r

declare -n foo
declare -a foo
declare -p foo
foo[0]=7
declare -p foo
unset foo

declare -n x
declare x=42
declare -p x

declare -n -r RO=foo
declare -p RO

unset -n r; unset r

f() { echo $r; }

declare -n r
r=/ /usr/bin/sum < /dev/null
r=/ f

unset -f f

# the details of this may change; this will tell me when they do
declare -n foo ; declare -i foo=7*6 ; declare -p foo
unset -n foo
declare -n foo ; declare -i foo ; foo=7*6 ; declare -p foo

# used to be buggy
f()
{
	unset var
	declare -n ref=var
	declare -n ref
	declare -p ref
}
f

unset -f f
f()
{
	local var
	declare -n ref=var
	declare -n ref
	declare -p ref
}
f