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Date:      Tue, 05 Nov 2019 00:23:06 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 241714] /usr/bin/diff --tabsize dies with SIGSEGV
Message-ID:  <bug-241714-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D241714

            Bug ID: 241714
           Summary: /usr/bin/diff --tabsize dies with SIGSEGV
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: rlwestlund@gmail.com

On the three systems I've tried, /usr/bin/diff with --tabsize dies with
SIGSEGV, regardless of any other options or arguments.

I'm observing the crash on FreeBSD 12.1-RELEASE.
uname -a: FreeBSD coppermind 12.0-RELEASE-p10 FreeBSD 12.0-RELEASE-p10 GENE=
RIC=20
amd64
freebsd-version -kur:
12.1-RELEASE
12.1-RELEASE
12.1-RELEASE

Outside of --tabsize, diff works normally.

The synopsis in diff(1) indicates that the option is a standalone. Later in=
 the
man page it's shown as '-tabsize' (as opposed to --tabsize), and said to ta=
ke
an argument (which makes sense); however I think the single dash is a typo
because when I run diff -tabsize 3 file1 file2, I get "diff: invalid option=
 --
z".

I've also tested this on two 12.0-RELEASE-p10 systems (DO droplets), and se=
en
the crash on them as well. I updated the userland of those systems to
12.0-RELEASE-p11 and the same thing happened. The DO droplets are also amd64
machines with GENERIC kernel.

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