DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 64N58Ssq4068275
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Date: Sat, 23 May 2026 15:07:53 +1000
To: cygwin@cygwin.com
Subject: file-5.46 segfault on Cygwin (only)
Message-ID: <ahE2Kc0MK1cnS-HK@raf.org>
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From: raf via Cygwin <cygwin@cygwin.com>
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Hi,

The current version of file/libmagic on Cygwin is 5.46.

It crashes when trying to analyse the zipfile
CookieAutoDelete@kennydo.com.xpi (a Firefox addon).
This is without decompressing the zipfile to allow
further analsis.

It's here for reference (raf.org/tmp/CookieAutoDelete@kennydo.com.xpi).

Strangely, 5.46 on macOS and Debian don't crash with this file.
It's just the 5.46 on Cygwin.

I compiled 5.46 on Cygwin myself to see if it's something
wrong just with the Cygwin package of file-devel but that
crashed too.

5.47 on all three systems doesn't crash, so that's good.

So, if anyone here has anything to do with packaging file-devel
for Cygwin, please update the package to 5.47. Thanks.

cheers,
raf


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