why is it not a syntax error?
In my opinion, it is a syntax error on 5.12. When I add a print to your try.pl file, I get the same error message as you do, and it does not print "foo". On 5.8.8, I get no error message and it does print "foo". 
#!/usr/bin/perl
use strict;
use MyPackage;

MyPackage::close_cnx();
print "foo\n";

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As an aside, you can promote warnings to errors like this: 

use warnings FATAL => 'all';

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In reply to Re: Conflict with INIT block is not an error? by toolic
in thread Conflict with INIT block is not an error? by andal

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