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package CriticTest;
...
[~/perl/test]$ perlcritic -1 CriticTest.pm
Private subroutine/method '_build_needs_build' declared but not used a
+t line 14, column 1. Eliminate dead code. (Severity: 3)
Always unpack @_ first at line 14, column 1. See page 178 of PBP. (S
+everity: 4)