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What does `echo xxx 1>&2xxx` do?

From: Peng Yu
Subject: What does `echo xxx 1>&2xxx` do?
Date: Fri, 7 May 2021 21:57:21 -0500 
Hi,

I see `echo xxx 1>&2xxx` generates no error messages, nor returns an
error status. Is this correct? Thanks.

$ { echo xxx 1>&2xxx; } 2>&1
$ echo xxx 1>&2xxx || echo "$?"

-- 
Regards,
Peng
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