I can think of a few reasons why this might fail.
First, I don't see any require Foo nor require Bar (or replace require with use).
Second, you can replace @ISA= qw(Base) with use base qw(Base) which has some advantages. But I have more important reasons for mentioning that: On file systems that ignore upper- vs. lower-case in file names, use Base could end up loading base.pm instead of Base.pm, which would also break your code.
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tye
(but my friends call me "Tye")
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