Bash Version: 3.1
Patch Level: 17
Release Status: release
concerns: FAQ E4)

"IFS=." inside a subprocess can not influence the read builtin:
read A B C D < <(IFS=.; echo $(/usr/local/bin/ipaddr))

should be:
IFS="."
read A B C D < <(echo $(/usr/local/bin/ipaddr))



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