Hi, everyone. I am having some trouble tracking down some odd behaviour with WWW::Mechanize. I am testing a web application. Among other things, I need to generate diffs between a CGI and a newer mod_perl version of the application, to ensure that they behave the same. I am attempting to follow a list of links with the same characteristics from each version of the application, but I am running into an odd problem. I am using code like the following. 

use strict;
use WWW::Mechanize;

my $mech_cgi = WWW::Mechanize->new;
my $mech_mod = WWW::Mechanize->new;

$mech_cgi->get( 'http://www.foo.com/cgi/' );
$mech_mod->get( 'http://www.foo.com/modperl/' );

my @cgi_links = $mech_cgi->find_all_links( text_regex => qr/Example/ )
+;

my @mod_links = $mech_mod->find_all_links( text_regex => qr/Example/ )
+;

# test the first ten
for( 0..9 ) { 
    print "following link: ", $cgi_links[$_]->url, "\n";
    $mech_cgi->follow_link( url => $cgi_links[$_]->url )
      or die "Error following link ", $cgi_links[$_]->url;

    print "following link: ", $mod_links[$_]->url, "\n";
    $mech_mod->follow_link( url => $mod_links[$_]->url )
      or die "Error following link ", $mod_links[$_]->url;

    # do some stuff
    print "finished link $_\n";
}

[download]

Everything seems to go fine up to following the first link in the loop. (#0.) After that, when I attempt to follow the second link, my script dies with the error. Unfortunately I haven't yet figured out how to get a more useful error message from WWW::Mechanize. (I'm sure I'm missing something in the docs.)

Here is the output I get: 

[mike@localhost ~]$ perl webdiff.pl
following link /cgi-bin/m.cgi?mid=261847852
following link /perl/m?mid=261847852
finished link 0
Error following link /cgi-bin/m.cgi?mid=305436842 at webdiff.pl line 9
+1.

[download]

I appreciate any help. Thanks.

Update: Formatting error.

In reply to WWW::Mechanize and following multiple links by friedo

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