On Thu, Jul 11, 2024, at 9:42 AM, Dr. Werner Fink wrote:
> I've a report that with later bash the following which works in bash-4.2
>
> [...]
>
> linux-40cm:~ # x () {
> > local x=y
> > declare -p x
> > echo $x
> > unset x
> > declare -p x
> > echo $x
> > }
> linux-40cm:~ # x
> declare -- x="y"
> y
> -bash: declare: x: not found
>
> but with bash-5.X the reporter sees (and complains)
>
> sl15sp5:~ # x () {
> > local x=y
> > declare -p x
> > echo $x
> > unset x
> > declare -p x
> > echo $x
> > }
> sl15sp5:~ # x
> declare -- x="y"
> y
> declare -- x
>
> ... for global variables it works as expected.
I won't speculate about the issue, but your subject goes too far.
The variable really is unset here:
% cat /tmp/x.bash
x() {
local x=y
declare -p x
echo "x is ${x-unset}"
unset x
declare -p x
echo "x is ${x-unset}"
}
x
% bash /tmp/x.bash
declare -- x="y"
x is y
declare -- x
x is unset
--
vq
