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$ perl -e'use 5.10;' Perl v5.100.0 required (did you mean v5.10.0?)--this is only v5.12.2, +stopped at -e line 1. BEGIN failed--compilation aborted at -e line 1.
$ perl -M5.014 -e1 Perl v5.14.0 required--this is only v5.12.2, stopped. BEGIN failed--compilation aborted.