I know about Devel::LeakTrace::Fast, but it requires a perl built for debugging, doesn't it?

Test::LeakTrace seems to do what you need, and it does not require a debug build:

#! perl
use strict;
use warnings;
use Test::LeakTrace;

our $ref;

my @info = leaked_info
{
    my @array = ();
    $ref = \@array;
  # undef $ref;
};

print join(', ', @$_) for @info;
[download]

Output (leaked SV, filename, line number):

ARRAY(0x1ddd33c), 99_SoPW.pl, 10
[download]

But, with undef $ref; uncommented, it gives no output (as there is then no leak).

HTH,