Bug report: IllegalStateException, when reading after rewinding

[Mark Evenson]

> On Sep 30, 2020, at 03:01, Robert Munyer <2433647181 at munyer.com> wrote:
> 
> (with-open-file (in "hello.text")
>              (list (read in)
>                    (read in nil)
>                    (file-position in :start)
>                    (read in)))

Reproduced and filed as [ticket 473][1].

[1]: https://abcl.org/trac/ticket/473

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