URI leaves ".." in absolute path (via new_abs())

[hadjiprocopis]

I wonder if it is expected behaviour from URI's url absolution (ok absolutisation) to still retain relative path components in final url. Someone (ikegami) at perlmonks said that this is violation of section 5.4.2 of RFC 3986

Here is a script to reproduce the problem (using perl 5.22, URI v1.73, LWP::UserAgent v6.33) :

!/usr/bin/env perl

use strict;
use warnings;
use URI;

# a relative url:
my $rel_url = '../../../../../abc.html';
# the base url, where I stand now:
my @base_uris = ('http://server.com/123/xyz',
'http://server.com/1/2/3/4/5',
'http://server.com/1/2/3/4/5/');

# URI's absolute url:
foreach my $abase (@base_uris){
   my $uri = URI->new_abs( $rel_url, $abase );
   print "absolute for base: $abase is\n\t".$uri."\n";
}

yields:

    http://server.com/../../../../abc.html
absolute for base: http://server.com/1/2/3/4/5 is
    http://server.com/../abc.html
absolute for base: http://server.com/1/2/3/4/5/ is
    http://server.com/abc.html

The last response is correct but I wonder whether for the first two cases URI should have used some heuristics to remove that ..