Nothing is wrong with your recursive uses; the problem is that you are also loading Foo.pm as a script, bypassing the multiple load checks that exist for require or use. The same thing happens without the recursion: 
$ cat>Baz.pm
package Baz;
use strict;
use warnings;
use Baz;
sub baz { }
1;

$ perl Baz.pm
Subroutine baz redefined at Baz.pm line 5.

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If you are going to use the same file both via use or require and as a main script or via do, you should manually put a "BEGIN { $INC{Module.pm} ||= __FILE__ }" in Module.pm before any possible use/require.

In reply to Re: Recursive use causes subroutine redefinition by ysth
in thread Recursive use causes subroutine redefinition by prowler

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