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From: Eduardo Bustamante <dualbus@gmail.com>
Newsgroups: gnu.bash.bug
Subject: Re: Incorrect passing of argc argv with multiple redirects
Date: Tue, 30 Jul 2019 10:56:29 -0700
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On Tue, Jul 30, 2019 at 10:35 AM Morgan McClure
<mcclure.morgan@gmail.com> wrote:
(...)
> ./a.out foo > /dev/null 2&>1; echo $?
>     returns 3 NOT as expected

Are you 100% certain the `2&>1` redirection means what you think it
means? (hint: I recommend reading the "Redirecting Standard Output and
Standard Error" section of the bash manual, check if the leading `2`
is valid there).