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Date: Sat, 17 Oct 2015 16:40:11 -0700
From: Ray Andrews <rayandrews@eastlink.ca>
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To: Zsh Users <zsh-users@zsh.org>
Subject: following a variable's value.
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Gentlemen,

I discovered by accident the useful 'warncreateglobal' and it has me in 
mind to ask if there's some way of tracing the  value of variable.  I 
know about 'set -x' of course, but some way of following the fortunes of 
a single variable would be very nice.