$ splain < 2
perl -c packtest.pl
Bareword "PENDULUM" not allowed while "strict subs" in use at packatest.pl line
        9 (#1)
    (F) With "strict subs" in use, a bareword is only allowed as a
    subroutine identifier, in curly brackets or to the left of the "=>"
    symbol.  Perhaps you need to predeclare a subroutine?

packtest.pl had compilation errors (#2)
    (F) The final summary message when a perl -c fails.