On Tuesday, February 19, 2013 01:05:44 PM Clark WANG wrote:
> On Fri, May 4, 2012 at 10:42 AM, Clark Wang <[email protected]> wrote:
>
> > See following example:
> >
> > $ echo ${.sh.version}
> > Version jM 93u 2011-02-08
> > $ x=123
> > $ function x.unset { return; }
> > $ echo x=$x
> > x=123
> > $ unset -v x
> > $ echo x=$x
> > x=
> > $
> >
> > But according to the ksh manual, "If the unset discipline is defined for
> > a variable, ... The variable will not be unset unless it is unset
> > explicitly from within this discipline function."
> >
>
> 93v- 2013-02-13 still has this problem.
Attempting to access the variable afterwards seems to be possibly problematic
as well.
$ ksh -c 'function x.unset { print -ru2 -- "$_"; }; x=foo; unset -v x; echo
"$x"'
foo
Segmentation fault
--
Dan Douglas
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