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From: Linda Walsh <bash@tlinx.org>
Newsgroups: gnu.bash.bug
Subject: indirection on '$1, $2...' ?
Date: Thu, 17 Sep 2015 22:10:23 -0700
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Xref: csiph.com gnu.bash.bug:11502

Is it documented that ${!1} won't give you indirection
of "$1"?  I guess I missed that, and sorta expected it
to do indirection the same as any other var, but doesn't
seem to work in 4.3.39.

Should it?  Or why shouldn't it?

tnx...
-l