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$ corelist List::Util Data for 2019-01-20 List::Util was first released with perl v5.7.3
$ perldoc perlhist |grep 5.7.3 5.7.3 2002-Mar-05 ... t t/**/*(.) (for 1-5.005_56) or **/*.t (for 5.6.0-5.7.3) 5.6.0 5.6.1 5.6.2 5.7.3 Jarkko 5.8.0 2002-Jul-18 1205 31 471 From 5.7 +.3