Why did Perl say() not append newline in FCGI mode?

I have a strange behaviour with Perl's say function in FCGI mode. Newlines won't be append. Why does this happen?

Sample code:

#!/usr/bin/perl -wT
use strict;
use warnings;
use utf8;
use feature qw( say );
use FCGI ();
use CGI qw( header );
my $cnt = 0;
my $req = FCGI::Request();
while ( $req->Accept() >= 0 ) {
    print header( -type => 'text/plain', -charset => 'utf-8' );
    say "Hello, world #$cnt";
    print "\n";
    print "$$\n"
    print 'Test 1234';

Expected result (and actual result via console):

Content-Type: text/plain; charset=utf-8

Hello, world. #1

Test 1234

Actual result via Apache/FCGI:

Content-Type: text/plain; charset=utf-8

Hello, world. #3
Test 1234

Some software info...

Debian Wheezy x86_64 Apache/2.2.22-11 mod_fcgid/1:2.3.6-1.1 Perl/5.14.2-12 FCGI.pm/0.75-1+b1


Unfortunately the implementation of the say() function requires the filehandle to support the $\ variable. Basically say is equivalent to writing:

{ local $\ = "\n"; print LIST }

Using FCGI, your STDOUT is replaced by a tied filehandle, which doesn't support $\. This means that say() doesn't work as intended. Whether this is a bug in FCGI or in say() seems to be debatable.

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