I don't believe that's correct. See this small example: 
my $hash = { a => 'b' };
sub foo { print $_[0], "\n"; return $hash; }
print foo('abcd')->{a};

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No parens required to use the arrow notation with a subroutine return value.

In reply to Re^2: Problematic UploadFile() method in CGI.pm by Errto
in thread Problematic UploadFile() method in CGI.pm by monkfan

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