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From: Greg Wooledge <wooledg@eeg.ccf.org>
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Subject: Re: Unset array doesn't work
Date: Mon, 26 Feb 2018 10:07:17 -0500
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Xref: csiph.com gnu.bash.bug:13751

On Mon, Feb 26, 2018 at 09:57:10AM -0500, Clint Hepner wrote:
> If necessary, you can define a global (at the expense of a single subprocess)
> 
>     myIFS=$(printf ' \t\n')

That actually won't work, because $(...) strips the trailing newline(s).
This might work:

myIFS=$(printf ' \t\nx') myIFS=${myIFS%x}