Perl 6 using Perl 5 modules

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When the official release of Perl 6 is released and I start to write some
Perl 6 programs using Perl 5 modules, will I get any errors? How will this
be handled? Will all of the Perl 5 modules have to be ported over and
converted to Perl 6 code? Can I have a basic perl6.pl file while using the
standard perl 5 IO::Socket module or whatehaveyou?