Björn Linse wrote:
> > The NULL is supposed to be the same as an empty, mutable list. This is
> > tricky, because code that expects a list needs to check for the NULL and
> > create the list if needed.
>
> how could this be possible?
>
> let x = getreg("a",1,1) " returns NULL
> let y = x
> call add(x, "text")
>
> now x is created, but y is still NULL, inconsistent with if x referred
> to an non-NULL empty list.
OK, yes, in that case it is different from a real empty list.
Do we really case about that?
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