bug#43597: 28.0.50; arc-mode.el fails to display a ZIP file

[Andreas Schwab]

On Sep 24 2020, Stephen Berman wrote:

> In case it helps, here is the final byte sequence in the file (I've
> replace the control characters and raw bytes by ASCII representations):
>
> PK^E^F\377\377\377\377%^@%^@\377\377\377\377\377\377\377\377^@^@

That means the archive is in ZIP64 format.  See
<https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT>.  The real
values are contained in the zip64 end of central directory record, which
has "PK\6\6" as the signature.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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