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CTLESC and CTLNUL removed in certain contexts


From: Grisha Levit
Subject: CTLESC and CTLNUL removed in certain contexts
Date: Thu, 20 Sep 2018 20:23:02 -0400

(this is maybe too edge-case to be worth looking at)

A couple circumstances cause repeated instances of \001 and any
instances of \177 to be removed from as string:

$ a=$'<\001\001><\177\177>'
$ z=$(compgen -W "$a"); echo "address@hidden"
z=$'<\001><>'
$ declare -A A=(); printf -v "A[$a]" X; declare -p A
declare -A A=([$'<\001><>']="X" )

The latter is resolved if assoc_expand_once is turned on.


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