Trying to use FCGI and output capture together

capture.fcgi

#!/usr/bin/perl

use warnings;
use strict;

use CGI::Fast;
use Capture::Tiny qw(capture);
use IPC::Run3 qw(run3);

my $cmd = 'date';
my $fmt = '+%h%m';

while(my $q = CGI::Fast->new){
    print $q->header('text/plain');
    print "Hello!\n Trying Capture::Tiny:\n";
    eval {
        my ($out, $err) = capture {
            0 == system($cmd, $fmt) || die $!;
        };
        print "\nCaptured output: $out\n";
        print "\nCaptured stderr: $err\n";
    };
    if ($@) {
        print "Died with error:\n$@\n";
    }
    print "Trying IPC::Run3:\n";
    eval {
        my ($out, $err);
        run3([$cmd, $fmt], undef, \$out, \$err) || die "Failed: $!";
        print "\nCaptured output: $out\n";
        print "\nCaptured stderr: $err\n";

    };
    if ($@) {
        print "Died with error:\n$@\n";
    }
}

Command Line output:
Content-Type: text/plain; charset=ISO-8859-1

Hello!
Trying Capture::Tiny:

Captured output: Aug08

Captured stderr:
Trying IPC::Run3:

Captured output: Aug08

Captured stderr:

Browser output:
Hello!
Trying Capture::Tiny:
Died with error:
Not a GLOB reference at /evogrid/software/lib/perl5/site_perl/5.12.2/x86_64-linux/FCGI.pm line 125.

Trying IPC::Run3: